Annual Race Planning: A/B/C Race Categorization and Season Scheduling — A Coach Walks You Through Building the Perfect Yearly Race Calendar

Coach’s Opening: First, Ask Yourself on Which Day You Want to Be at Your Best

Every November and December, my inbox fills up with the same type of message. Athletes excitedly send over an Excel spreadsheet, densely listing the dozen or so races they want to sign up for next year—a cycling race in March, Challenge Taiwan in April, a duathlon in May, a city marathon in June, a couple of Sprints in July and August, a half-distance triathlon in September, Puyuma in October, and maybe squeezing in a race in Japan in November. Then it ends with: “Coach, is this too many races? I want to go for a PB in every single one.”

I usually reply with one question: “Tell me, out of this entire coming year, on which single day do you most want to be at your absolute peak?”

This question often stuns people. Because most amateur athletes have never considered that the number of times your body can reach a “true peak” within one year is limited. You can’t be strong in March, strong in May, strong in July, and strong again in October. The physiological reality is: the peak painstakingly built up through a training cycle doesn’t last long, and every time you climb to that peak and then fall off it, your body pays a recovery cost.

I’ve coached athletes ranging from those attempting their first 51.5 finish to those earning Kona slots. Over these fifteen years, the factor that most separates those who “progress” from those who “spin their wheels” is often not whose training plan is tougher, but whose season planning is smarter. Take two people racing eight times a year: one gets stronger with each race and hits a lifetime peak at season’s end; the other burns out mid-year, struggles through the second half carrying fatigue, and gets worse with every race. The difference lies in whether they understand the A/B/C race classification system.

In this article, I want to lay out the entire logic I use to help athletes plan their annual race calendar. From the scientific basis for why you can only truly peak once or twice a year, to how to use B/C races as training, how long to leave between two A races, how long the season should be, and finally, actionable advice you can follow directly based on your level. Grab a pen and paper, let’s begin.

Foundational Concept: Why You Can Only Be “Truly Strong” Once or Twice a Year

A Peak Isn’t a State; It’s a Curve That Fades

Let’s first address a common misconception: peak fitness isn’t something you reach and then stay at forever. It’s more like a curve that rises, then slowly declines.

Sports science often uses the “fitness-fatigue” model to understand this: each day of training accumulates two things simultaneously—long-term fitness (which fades slowly) and short-term fatigue (which fades quickly). Your current performance is roughly equal to “fitness minus fatigue.” During hard training, fitness keeps rising, but fatigue also weighs heavily, so you don’t feel particularly strong. Then, when you start tapering before a race, fatigue drops quickly while fitness hasn’t had time to decline much, and the gap between the two suddenly widens to its maximum—this is what we call the “peak.”

The key point: this peak window is narrow, only about two to three weeks. After that, the freshness from tapering fades, fitness begins to decline, and you slide off the peak. This is why you can’t stay at your strongest all year—your body physically can’t do it.

One to Two A Races a Year Is the Scientifically Validated Ceiling

I’ve checked several mainstream training resources, and the conclusion is highly consistent: most athletes should set only one to two A races per season (i.e., goal races where you go all out). For longer distances like half-distance triathlon (113), a season can support at most one to two peaks, and the two races must be at least eight to ten weeks apart, with a genuine recovery period and a rebuilding period in between. Trying to cram more than a few all-out races into one training cycle will simultaneously undermine your training quality and your A-race performance. (Sources listed at the end of this article)

This number hits many people like a bucket of cold water. You might have thought that scheduling eight races and going all out in each one was “making full use of the season”; in reality, you’re diluting your training, leaving every race in an awkward state of half-recovery, half-fatigue, unable to peak in any of them.

The A/B/C Classification System: Defining the Role of Every Race

The solution is to put a label on every race. This A/B/C classification system is a framework long used in the international coaching community, and it’s always where I start when planning an athlete’s season:

Classification	Role	Taper Strategy	Performance Expectation	Post-Race Recovery
A Race	The most important race of the year; the goal event where you aim for your best performance	Full taper (1–3 weeks, depending on distance)	Go for a PB, qualification, or age-group placing	Full recovery period + mental relaxation
B Race	Important but secondary; race hard but without a full taper	Light taper (3–5 days)	Race seriously; use as a high-quality stimulus and rehearsal	Short recovery (3–7 days)
C Race	Pure training opportunity; practice transitions, test nutrition, gain experience	No taper; treat as a high-intensity workout	No performance expectations	Almost no additional recovery needed

The spirit of this table is: You don’t have to go all out in every race; instead, let every race play a clear role in the overall season. The A race is the protagonist, the B race is an important supporting role and dress rehearsal, and the C race is the prop and practice ground. Once you understand this, your entire year will have rhythm.

B Races and C Races: Treat Races as the Best Workouts

C Races—A High-Quality Training Day You Pay For

I often tell athletes: “A C race is an ultra-realistic training session you buy with your entry fee.” Its value isn’t in the result, but in the things you can’t easily practice elsewhere:

• Transition practice (T1, T2): Fumbling to get your wetsuit off after the swim, struggling to clip into your pedals, wobbly legs on the run—these can only truly be practiced in a race setting. Doing one C race and running through your transitions is a hundred times more useful than simulating them in your head at home.
• Open water experience: No matter how fast you swim in a pool, many people panic when faced with open water waves, crowds, no visible bottom, and the need to sight. A C race is the safest place to build your open-water confidence.
• Nutrition testing: In this race, you can boldly try new energy gels, new salt tablets, and new fueling schedules. Even if your stomach rebels, it doesn’t matter—because this isn’t your goal race. Never try new nutrition for the first time at an A race—that’s an iron rule.
• Pacing discipline practice: A C race is the best place to practice “holding back and not going out too fast.” Many people get swept up in adrenaline at the gun and blast off, feeling great early and crashing late. Practice racing to plan at C races to build discipline.

The key point: Don’t taper or take extra rest for a C race; just fit it into your normal training load. It’s simply a high-intensity long workout. Train as usual the day after.

B Races—Race Seriously, but Don’t Empty Yourself for Them

B races are one step more serious than C races. You race hard and want a good result, but you don’t do a full taper for them—at most, you trim the volume slightly three to five days before. Their role is:

1. A formal dress rehearsal for your A race: If your A race is a 113 half-distance triathlon, scheduling an Olympic-distance (51.5) B race six to eight weeks beforehand is an excellent opportunity to validate your nutrition plan, equipment setup, and race pacing.
2. A high-quality race-intensity stimulus: The intensity and focus of a race are hard to replicate in solo training. A B race gives you a rare “real intensity” workout.
3. Mental calibration: It lets you experience race pressure, pre-start anxiety, and the race-day atmosphere once before your A race, so you won’t feel too raw on the big day.

When I schedule B races for athletes, I have a principle: The B race distance is usually equal to or shorter than the A race. You wouldn’t use a full marathon as the B race for a half-marathon A race—the recovery cost is too high and would eat into your A-race preparation.

A Real Example: Xiao Rou’s 113 Season

Let me illustrate with one of my athletes. Xiao Rou (pseudonym) is a busy office worker whose goal was to complete her first 113 half-distance triathlon by year-end. Here’s how I assigned roles across her entire year:

• January–February: Pure base period, no races scheduled.
• March: A community Sprint triathlon (C race)—her first time practicing transitions and open-water sighting in a race.
• May: An Olympic-distance race (B race)—race seriously, test her energy gel timing and bike pacing.
• July: A city half marathon (C race)—used as a run endurance test, no taper.
• October: Her 113 (A race)—full two-week taper, all-out peak.

As you can see, there’s only one A race all year; everything else serves it as practice and validation. As a result, Xiao Rou not only finished that 113, but had zero nutrition mistakes and almost no drop-off in pacing from start to finish—because she’d already made and corrected all her mistakes in the earlier C and B races.

Laying Out the Whole Year on a Calendar: Xiao Rou’s Annual Framework

Talking about role assignments isn’t specific enough, so let me show you Xiao Rou’s training focus for that year, laid out month by month in a framework table. This isn’t a day-by-day training plan (everyone’s volume needs to be individualized); it’s a skeleton of “what to do this month and what role the race plays”:

Month	Training Phase	Race Schedule	Monthly Focus
January	Base Period	None	High-volume, low-intensity aerobic work; refine technique; build swim foundation
February	Base Period	None	Continue building aerobic base; add strength training; establish weekly routine
March	Build Period	Sprint (C Race)	First race-practice of transitions; open-water sighting
April	Build Period	None	Increase bike and run load; add tempo intensity
May	Build Period	Olympic (B Race)	Race seriously; test nutrition timing and bike pacing
June	Specific Period	None	113-specific intensity; brick sessions (long ride + run)
July	Specific Period	Half Marathon (C Race, no taper)	Run endurance test; heat adaptation
August	Specific Period	None	Highest load month; simulate race-segment pacing
September	Specific Period	None	Wind down load; fine-tune equipment and nutrition
October	Taper + A Race	113 (A Race)	Full two-week taper; all-out peak
November	Transition Period	None	Active recovery; try other sports; recharge mentally and physically
December	Transition/Base	None	Easy restart; plan next season

The most important thing to notice in this table is the rhythm: light at the start, heavy in the middle, taper before the race, rest after. The entire year has only one “all-out” month—October—and everything else either builds toward it or recovers from it. This is what a healthy season should look like: not burning every month, but rising and falling, with tension and release.

Many athletes’ first reaction to this table is: “Only three races? Isn’t that too few?” My answer is always the same: three races with clear roles are far better than eight races all mixed together, each done half-heartedly. The value of racing is never in quantity; it’s in whether you let each race push you toward that final goal.

The Science of Spacing Between Two A Races

Some more ambitious athletes want to set two A races a year—for example, one in spring and one in autumn. This is entirely feasible, but the spacing is the key to success or failure.

Why at Least Eight to Ten Weeks

As mentioned earlier, there should be at least eight to ten weeks between two peaks for longer-distance events. This number isn’t arbitrary; it corresponds to the time needed for a complete “mini-cycle”:

1. Post-race recovery period (1–2 weeks): An A race (especially a long-distance one) causes deep muscle damage, hormonal disruption, immune suppression, and mental exhaustion. During this time, you need active rest, low-intensity activity, plenty of sleep and good food, and to let your body truly reset. Skipping this step is the most common fatal mistake among amateur athletes.
2. Rebuilding period (4–6 weeks): After recovery, you can’t go straight back into a taper, because your fitness has dropped somewhat during the A-race taper and post-race recovery. You need to ramp up training load again to rebuild your fitness base.
3. Second taper period (1–2 weeks): Taper once more to shed fatigue and welcome the second peak.

Adding these three phases together, the minimum is eight weeks; for longer distances, ten weeks or more is safer. If you schedule two A races too close together (e.g., only four weeks apart), the fatigue from the first hasn’t cleared and fitness hasn’t been rebuilt—you’ll be fighting the second race on fumes, and both races will suffer.

The Longer the Distance, the Wider the Spacing

Here’s an intuitive proportional concept, laid out in a table:

A Race Distance	Recommended Minimum Gap Between Two A Races	Full Post-Race Recovery	Notes
Sprint (25.75)	3–4 weeks	3–5 days	Recovers quickly; can be scheduled more densely
Olympic (51.5)	4–6 weeks	5–7 days	Middle distance; needs a small build period
Half Ironman 113	8–10 weeks	10–14 days	Deep damage; slow recovery
Full Ironman 226	Recommend only one per year	3–4+ weeks	One race consumes most of the season

See that 226 row? The destructive impact of a full Ironman is so great that I almost always recommend athletes set only one 226 A race per year. If you’ve signed up for Challenge Taiwan 226 in Taitung this year, that’s your only peak of the year; everything else gets downgraded to B or C races. Trying to squeeze in a second full-distance Ironman in the same year, unless you’re a professional, is usually more loss than gain.

A Practical Layout for Two A Races

Suppose you want two Olympic-distance A races, one in spring and one in autumn. A reasonable skeleton would look like this:

• A Race #1 (April): Full taper, race all out.
• Recovery (late April): 1 week of active recovery.
• Build Period (mid-May to June): Ramp training load back up; can insert a C race in the middle to maintain race sharpness.
• Taper (late June): 1–2 weeks.
• A Race #2 (early July): Second peak.

With about ten weeks between the two races, including recovery, rebuilding, and a second taper, this is a layout that allows you to race well in both events.

How Much to Taper: A Practical Reference

When it comes to tapering, the biggest confusion for many athletes is “how much volume to cut and for how long.” Here’s a practical reference framework—note, these are starting points; adjust based on your personal recovery speed:

Race Distance	Taper Length	Training Volume Reduction	Intensity Handling
Sprint (25.75)	3–5 days	Reduce ~30–40%	Keep a small amount of high-intensity, short bursts
Olympic (51.5)	5–7 days	Reduce ~40–50%	Maintain intensity; cut volume
Half Ironman 113	10–14 days	Reduce ~50–60%	Keep some rhythm; drastically cut long-session hours
Full Ironman 226	2–3 weeks	Reduce ~50–65%	Decrease progressively week by week; almost pure rest in the final week

There are two common tapering mistakes: one is tapering too little, so fatigue hasn’t cleared and your legs still feel heavy on race day; the other is cutting intensity entirely, spending two full weeks only on super-slow easy sessions, causing your body to “forget” how to generate power, leaving you flat on race day. The correct approach is: cut training “volume” significantly, but retain a bit of training “intensity”—use short, sharp high-intensity efforts to keep the body in a race-ready state while shedding fatigue. This is the core principle of tapering; be sure to remember it.

Season Length Control: Don’t Let the Season Eat Your Off-Season

An Often Overlooked Concept: The Off-Season Is Part of Progress

Many athletes stretch their “season” too long. Racing from February all the way to December, year-round without a break. These people usually hit a plateau the following year—because they never give their bodies a true off-season.

I typically recommend a complete annual plan that looks like this:

• Competitive season: About 5–7 months, with A/B/C races concentrated here.
• Off-season/transition period: About 4–6 weeks after the season ends, with active rest, trying other sports (swimming, hiking, yoga—all good), and letting your mind recharge.
• Base building period: About 3–4 months of high-volume, low-intensity aerobic foundation work to build the base for the next season.

Compressing the season to five to seven months isn’t about racing less; it’s about having something to push for when it’s time to push, and truly resting when it’s time to rest. People who race year-round look dedicated, but they’re actually in a chronic state of half-fatigue, and their training quality suffers as a result.

The Actual Rhythm of the Taiwanese Season

Taiwan’s triathlon season has its own geographical and climatic characteristics that must be factored into your annual plan:

• Spring (March–May): Comfortable temperatures and warming water make this the golden window for triathlon events. Asia’s largest event, Challenge Taiwan, falls in late April in Taitung; in 2026, it’s the weekend of April 25–26 (source at the end). Many people set their spring A race here.
• Summer (June–August): High heat and humidity make this the season for heat adaptation and C races to practice fueling and cooling, but be especially careful about heatstroke risk—keep pacing conservative.
• Autumn (September–November): Weather cools again, making it suitable for a second-half A race.
• Winter (December–February): Most people’s off-season and base period; in the humid cold of the north, move indoors to trainers and pools.

Taiwan’s summers are hot and humid. My reminder to athletes is: Almost all summer races should be downgraded to C or B races, treating cooling, hydration, and electrolyte replenishment as the primary training goals—don’t try to force a PB in the scorching heat. It’s smarter to save your true A races for spring and autumn.

Common Mistakes and Corrections

In all my years coaching athletes, I see the same mistakes repeated over and over. Here are the most common ones, along with directions for correction:

Mistake One: Treating Every Race as an A Race

Symptoms: Eight races on the entry list, wanting a PB in every one, tapering before every one.

Consequences: Because you’re constantly cycling through “taper—race—recover,” there’s never a continuous block of training load to improve fitness. Result: fitness stagnates, and you’re burned out by mid-year.

Correction: Be ruthless. Choose only one or two races all year as A races; downgrade everything else. Treat “being willing to let go” as a skill to train.

Mistake Two: A Races Too Close Together

Symptoms: A 113 in May and another 113 in July, with only eight weeks between and no recovery scheduled.

Consequences: The second race is fought on residual fatigue, performance drops significantly, or you even get injured.

Correction: For long distances, leave at least eight to ten weeks between two A races, and make sure the gap includes a full recovery period and a rebuilding period. If it doesn’t fit, downgrade one of them to a B race.

Mistake Three: Season Too Long, No Off-Season

Symptoms: Racing year-round, still competing in December, then jumping straight back into training in January.

Consequences: Chronic fatigue accumulates, motivation drains, progress stalls the following year, and you may even develop overtraining syndrome (poor sleep, elevated resting heart rate, unexplained irritability, declining performance).

Correction: Give yourself four to six weeks of transition after the season ends. Try different sports, relax, and let your body and mind truly reset before restarting.

Mistake Four: Trying Something New for the First Time at an A Race

Symptoms: Wearing new shoes on A-race day, using untested energy gels, or a new saddle.

Consequences: New gear causes blisters, stomach issues, or a sore sit-bones so bad you can’t ride—destroying a year of hard work over details.

Correction: Test all equipment, nutrition, and pacing strategies at C and B races. On A-race day, only do things that have already been proven to work.

Mistake Five: Ignoring Taiwan’s Summer Heat

Symptoms: Treating an August race as an A race and going all out, ending up with heatstroke, dehydration, or cramping.

Consequences: Not only no PB, but potentially dangerous conditions like heat exhaustion.

Correction: Downgrade summer races to C/B races, pace one notch more conservatively than usual, prioritize hydration and electrolyte strategies above all, and treat it as heat-adaptation training.

Actionable Advice for Athletes at Different Levels

Everyone starts from a different point, so season planning should be tailored accordingly. Here are my specific recommendations for three levels of athletes:

For First-Time Triathletes (Goal: Finish)

If your goal this year is to complete your first triathlon, my advice is simple:

• Set only one A race all year—your first triathlon goal race. I recommend starting with Sprint (25.75) or Olympic (51.5) distance.
• Before the A race, schedule one to two C races (shorter, community-level events) purely to practice transitions, open water, and test nutrition.
• Don’t sign up for a 113 or 226 right away. Spend a full year solidifying the “finish” experience; talk about longer distances next year or the year after.
• Mentally: finishing is victory; don’t compare yourself to others’ times. Your opponent is the finish line, not other people.

For Intermediate Athletes (Goal: Break PBs, Compete for Age-Group Placings)

You’ve finished several races and want to start chasing times:

• Set one to two A races, with B/C races supporting them.
• Six to eight weeks before each A race, schedule a shorter-distance B race as a formal dress rehearsal to validate nutrition and pacing.
• Start taking the off-season and base period seriously—your next wave of progress often comes from quietly building aerobic base during the winter.
• Learn to read data: training load, resting heart rate, and sleep quality are all indicators of whether you’ve recovered enough to push intensity again.

For Elite-Oriented Athletes (Goal: Qualification Races, Podium Finishes)

You’re aiming for a Kona slot or age-group podium:

• Season planning needs to be more precise. Typically, set one most important A race (the qualification race), with a possible secondary A race depending on circumstances.
• Strictly adhere to the eight-to-ten-week-plus gap between two A races; recovery and rebuilding are non-negotiable.
• Control season length even more strictly—rather race less but race sharp, than travel everywhere chasing results. Every non-A race must have a clear purpose.
• At this level, I recommend discussing the details of season planning one-on-one with a professional coach, taking into account your personal recovery speed, life stress, and work schedule.

FAQ

Q: I only want to race three times a year. Do I still need to classify them as A/B/C?

A: Yes, and even more so. Even with just three races, clearly pick one as your A race for an all-out peak, and treat the other two as B or C races. That way you know which one deserves a full taper and which ones are just practice, giving your training a clear focus.

Q: Can I go all out at a B race? Will it affect my A race?

A: You can race hard, but understand that without a full taper, you won’t be at your peak. As long as there’s enough gap between the B race and the A race (usually six weeks or more) and you take a few days to recover afterward, it won’t harm your A race. In fact, the race intensity of a B race is a great stimulus.

Q: What if the two A races I want to do are only five weeks apart?

A: Five weeks is too close for longer distances. The most practical approach is to downgrade the race you care less about to a B race, doing a full taper and going all out for only the other one. If you insist on peaking for both, the usual result is that both suffer.

Q: Will I lose a lot of fitness if I do nothing during the off-season?

A: The transition period isn’t about being a couch potato; it’s about staying active in a different way—hiking, swimming, yoga, easy rides—maintaining basic activity while escaping the pressure of structured training. The small fitness loss from a four-to-six-week transition is a very worthwhile trade for complete physical and mental recovery, and the base period will quickly build it back.

Q: Is it absolutely impossible to set an A race in Taiwan’s summer?

A: Not absolutely impossible, but the risk and cost are high. If your goal race naturally falls in summer (e.g., certain classic summer events), then do thorough heat-adaptation training, set conservative pacing targets, and prioritize your fueling strategy above all. But if you have the choice, placing A races in spring and autumn usually yields better results.

Q: How do I know if I’ve recovered well enough to move into the next training cycle?

A: Don’t rely on “feelings” alone; cross-check a few objective indicators for better accuracy: your morning resting heart rate (several consecutive days noticeably above normal means you’re still fatigued), sleep quality (poor sleep or frequent waking is a warning sign), perceived effort during training (the same pace feeling unusually hard), and mental motivation (dreading training is often a sign of physical and mental overload). If two or more of these four indicators show red flags, give yourself a few more recovery days before pushing intensity. Learning to read your body’s signals is more important than any number from an app.

Q: As someone who eats out often, how should I arrange my diet during the season?

A: Eating out is convenient in Taiwan; just grasp a few principles: during high-volume training periods, don’t skimp on staple carbs (rice, noodles)—that’s your fuel; try to include a source of protein at every meal (chicken breast, eggs, tofu, fish) to aid recovery; convenience store items like unsweetened soy milk, tea eggs, sweet potatoes, and bananas are very convenient pre- and post-training snacks. For actual race-day fueling strategy, I recommend consulting a sports nutrition professional for a personalized plan.

Conclusion: Draw the Finish Line First, Then Plan the Route

Back to the question I asked at the start: out of the entire coming year, on which day do you most want to be at your best?

Circle that day—that’s your A race. Then work backward to decide which races will be B races for rehearsal, which will be C races for practice, when the season starts, when to rest, and how to structure the off-season. Draw the finish line first, then plan the route—that’s the entire essence of annual race planning, and the iron rule I’ve validated over and over for all these years.

Peaking truly once or twice a year might sound conservative, even counterintuitive. But precisely because you concentrate your resources on a few races, each one can truly shine. Those who race all-out all year round often never truly peak in a single race. Instead, it’s the athletes who know how to make trade-offs and let B/C races serve the A race who improve steadily year after year, eventually standing on the finish line of their dreams, or even earning that coveted age-group result or qualification.

For the new season, don’t rush to fill up your race calendar. Sit quietly first, figure out your day, and then fit the entire year just right. Less is more;取舍 (making trade-offs) is strategy—that’s the one sentence I most want to pass on to you after fifteen years of coaching. See you at the races.

This article is educational content and cannot replace individual assessment by a physician, physical therapist, or nutritionist. If you have any health conditions, injury history, or special nutritional needs, be sure to consult a professional before starting training or adjusting your season plan.

References

• Challenge Taiwan event information (2026 race dates and Taitung course): https://www.challenge-taiwan.com/index.aspx?lang=US
• Challenge Taiwan set for record-breaking weekend in Taitung (event scale and date report): https://endurance.biz/2026/industry-news/challenge-taiwan-set-for-record-breaking-weekend-in-taitung/
• The ABC of planning your triathlon race season, 220 Triathlon (A/B/C race classification system): https://www.220triathlon.com/training/the-abc-of-planning-your-triathlon-race-season
• Planning Your Race Season, 80/20 Endurance (one-to-two A races, eight-to-ten-week gap principle): https://www.8020endurance.com/planning-your-race-season/
• The Art of Periodization in IRONMAN Training, Inner Athlete Coaching (why you can’t peak multiple times a year): https://www.innerathletecoaching.com/post/the-art-of-periodization-in-ironman-training-why-you-can-t-peak-several-times-a-year

Related Reading

• Triathlon Season Planning: How to Schedule A/B/C Races
• Multi-Marathon Season Planning: Allocating A, B, and C Races
• Annual Race Planning: How to Choose A/B/C Races, Schedule Season Peaks, and Avoid the Fatigue Trap of Racing All Year
• Complete Season Planning Guide: Training Arrangements for A/B/C Goal Races