5.5 km, Nearly 12% Average: Alto de Hazallanas — Andalusia's Hidden Hell

Short, but Despairingly So

If Angliru is the archetype of “accumulating suffering through length,” then the Alto de Hazallanas takes the completely opposite approach—it is short, so short it barely qualifies as a “climbing journey,” but it concentrates suffering to the extreme: over just a few kilometers, the average gradient approaches or even exceeds double digits, making it one of the most brutally steep short climbs in the Spanish road cycling community. The road is hidden within the network of farm roads near Granada, at the foot of the Sierra Nevada. Were it not for word of mouth within the road cycling community, most tourists would never even know this road exists.

The Alto de Hazallanas has a character distinct from the other four routes covered in this article—it lacks Angliru’s race pedigree, Covadonga’s historical significance, Veleta’s altitude records, or Teide’s alien landscape. It is famous for one thing and one thing only: the gradient numbers themselves. This type of “plain-faced yet ferocious” route actually shares much in common with the steep farm roads that Taiwanese cyclists whisper about among themselves but which carry no official race prestige—what truly tortures you is often not the famous climbs under the media spotlight, but the hidden routes passed down by word of mouth among local riders, discoverable only through local knowledge.

Route Basic Information Table

Data discipline for the Alto de Hazallanas needs special emphasis: since this is not an officially adopted race segment and has no long-term official survey records, online citations of the route’s precise gradient figures vary considerably. Different climbing databases and different riders’ GPS traces can produce noticeably different average and maximum gradient calculations. This is the norm for this type of “non-race” steep climb—their existence relies more on community word of mouth and sharing among actual challengers than on official unified surveying. Readers planning to attempt it should approach with the mindset that “figures are for reference only; defer to on-site experience and signage.”

Segment Breakdown: No Warm-Up, Straight to Business

The biggest difference between the Alto de Hazallanas and the other routes covered earlier is that it has virtually no “warm-up segment”—the distance is too short, and the gradient starts asserting itself almost from the very beginning. It can be roughly understood in three segments.

Segment One: Start to the Village Edge (Opening Section)

After leaving the foothill village, the gradient almost immediately enters double-digit territory with no buffer whatsoever. This is a major test of a rider’s mental preparation—most long climbs give you a few minutes for your body and cardiovascular system to gradually ease into the effort, but the Alto de Hazallanas offers no such opportunity. From the very first pedal stroke, it is high-intensity output.

Segment Two: The Continuous Steep Core (Middle Section)

This is the most ferocious section of the entire route. The gradient holds steady at high double digits and even approaches the limit locally. In some sections, the road creates a distinct visual illusion—because the gradient is so steep, from the rider’s perspective the road ahead looks almost like a vertical wall. This section tests not endurance, but whether you can sustain power output at or near your personal anaerobic threshold over a short period, while simultaneously managing bike-handling stability at low speeds.

Segment Three: The Final Struggle (Closing Section)

The closer you get to the finish, the more some challengers encounter the steepest sections of the entire route. This “saving the worst for last” design (or perhaps a coincidence of terrain) is somewhat similar to Angliru’s logic of placing its steepest sections in the middle-to-late portion—both demand that you contend with the most punishing gradients while your energy reserves are already heavily depleted. After surviving this final stretch, the sense of relief upon reaching the summit is especially intense—because the suffering density of the entire route is so high, the sense of accomplishment is correspondingly concentrated.

Why Andalusia Produces Steep Climbs of This Caliber

Andalusia’s ability to nurture extreme climbs like the Alto de Hazallanas is closely tied to the region’s topography. The Sierra Nevada rises abruptly from relatively low-altitude foothills to peaks exceeding three thousand meters. This dramatic elevation differential, combined with the fact that early agricultural and pastoral farm roads were generally built following the shortest-distance principle rather than the gentle gradient designs favored by modern road engineering, has resulted in a scattering of farm roads throughout the area with gradients so steep they defy reason. These roads were originally built with absolutely no connection to road cycling—they existed purely to allow mountain farmers and herders to travel between settlements and farmland by the shortest possible route. But precisely because of this, they have left behind these “untamed by modern road engineering” raw climbs, which today have become prized challenge targets in the eyes of road cycling enthusiasts.

This phenomenon is not unique to Andalusia. Many of the world’s climbs famous for steepness share similar origins—the cobbled climbs of Flanders in Belgium, and some of Italy’s renowned “muri” (the Italian word for “walls,” referring to extremely steep short climbs), mostly derive from ancient agricultural or pilgrimage roads rather than being deliberately planned and built for sporting events. The Alto de Hazallanas can be considered the Spanish version of this “accidental heritage.” Its existence reminds modern road cycling enthusiasts that the purest challenges are often hidden in corners that were never designed to test limits, yet naturally became extreme due to terrain constraints.

The Unique Ecosystem of “Non-Race” Steep Climbs

The way the Alto de Hazallanas exists reflects an interesting phenomenon in road cycling culture: not every route worth challenging needs the endorsement of professional racing to become famous. With the proliferation of GPS track-sharing platforms and social media, “hidden routes” like the Alto de Hazallanas—once known only to local riders—have gradually accumulated international recognition through segment leaderboards, rider community discussions, and blog ride reports, attracting climbing enthusiasts from around the world to make the pilgrimage, even though the road has never appeared on any professional race’s official route.

This “bottom-up” route reputation, in a sense, is closer to the pure spirit of challenge than climbs canonized by professional racing—no broadcast cameras, no feed stations, no crowds cheering from the roadside. Just you, the gradient, and a dialogue between yourself and your own willpower. The Alto de Hazallanas is not the only short, steep climb of this nature in Andalusia. The network of farm roads around the Sierra Nevada is scattered with numerous challenge segments of similar caliber, which has made the Granada area, beyond its famous race climbs, another “steep climb hunter’s” holy land worthy of deep exploration in the minds of European road cycling enthusiasts.

Equipment Preparation: Not a Level Standard Climbing Gear Can Handle

Facing an extreme climb of the Alto de Hazallanas’s caliber, the standard configuration of most road bikes will prove inadequate. Here are several key equipment considerations:

Gearing is absolutely critical: To reiterate, the standard climbing gearing most amateur riders are accustomed to (e.g., 34-28) will make seated pedaling nearly impossible on this route. Even 34-32 or lighter combinations will still be extremely demanding on the steepest sections. In recent years, many riders who specialize in tackling this type of extreme short climb have opted for cassettes with wider gear ranges, specifically to ensure cadence can be maintained within a controllable range and to avoid being forced to struggle or even stall on the steepest gradients due to insufficiently light gearing.

Tire traction: Low-speed, high-torque pedaling places extremely high demands on rear-wheel traction. Especially if the road surface is wet or has loose gravel, the risk of rear-wheel spin and slippage increases noticeably. It is recommended to choose tires with excellent grip and to adjust tire pressure appropriately to increase the contact patch.

Frame geometry and center of gravity: On gradients this steep, the fore-aft distribution of the rider’s body weight directly affects whether the front wheel maintains sufficient steering control and whether the rear wheel maintains sufficient drive traction. Most challengers recommend shifting your body weight slightly forward on the steepest sections (but avoiding excessive forward shift that overloads the front wheel and causes rear-wheel slip), and seeking a balance point of front-rear traction by sliding the hips slightly forward on the saddle nose. This requires a certain amount of practice and accumulated experience to master.

Power and Pacing Estimates: How Long Will Riders of Different Abilities Take?

Using the same physical model:

P = (Fg + Fr + Fa) × v / Drivetrain Efficiency

Fg = m × g × sin(arctan(gradient))       Gravitational component
Fr = m × g × cos(arctan(gradient)) × Crr  Rolling resistance
Fa = 0.5 × ρ × CdA × v²                   Air resistance

Calculation assumptions: Total mass m = 70 kg rider + 9 kg bike and equipment = 79 kg; g = 9.81 m/s²; Crr ≈ 0.005; CdA ≈ 0.32 m²; air density adjusted downward for an average elevation of approximately 900 meters over the route; drivetrain efficiency ≈ 0.975. Using approximately 5.5 km in length and 650 meters of total elevation gain (average gradient ≈ 11.8%), the results are as follows:

The above are physical model estimates that do not account for wind direction, road surface quality, body size differences, or gradient fluctuations; actual results will vary. What is particularly noteworthy is that the average speeds shown in this table all fall in the single digits to just over ten kilometers per hour. This means that even an “advanced” rider at 3.0 W/kg averages under 8 km/h for the entire route—close to the walking speed of an average person. This is the core characteristic of the Alto de Hazallanas: the distance is short, but the intensity density is extremely high. The time investment is not necessarily small, and the suffering is disproportionately greater.

If we further examine the instantaneous power demands of the steepest local sections: assuming a 20% gradient, maintaining 6 km/h requires approximately 267 watts (approximately 3.82 W/kg, based on a 70 kg rider); maintaining 8 km/h raises the requirement to approximately 357 watts (approximately 5.10 W/kg). If you unfortunately encounter a section approaching 25%, maintaining 6 km/h requires approximately 329 watts (approximately 4.69 W/kg), while maintaining 8 km/h pushes the requirement to nearly 439 watts (approximately 6.27 W/kg). These numbers explain why, on the steepest sections of the Alto de Hazallanas, most riders (including advanced enthusiasts with a solid training base) find it very difficult to maintain continuous pedaling. Standing out of the saddle and even brief zigzag riding are common coping strategies.

The practical takeaway from these numbers for amateur riders is quite straightforward: when facing gradients of this caliber, gearing must be prepared with the most conservative, easiest mindset possible—requiring significantly lighter climbing gears than for a typical long climb. Otherwise, you will likely be forced to dismount and walk in the middle section when your cadence drops below the critical threshold. On extreme climbs like the Alto de Hazallanas, this is nothing to be ashamed of; in fact, it is a fairly common outcome.

The Real Picture from Rider Accounts

Browsing through rider accounts of the Alto de Hazallanas and similar extreme short climbs reveals several recurring themes. The first is “distorted time perception”—many challengers mention that despite the distance being only a few kilometers, the subjective experience of actually riding it feels far longer than imagined. That lingering torment of being perpetually on the edge of maximum output while the finish remains frustratingly out of sight is entirely different in nature from the fatigue of a long climb. It more closely resembles a high-intensity interval session stretched out indefinitely.

The second common theme is “the prevalence of dismounting and walking.” Many riders openly admit that they or their riding partners were forced to dismount and push on the steepest sections. These accounts repeatedly convey a message: in the face of gradients of this caliber, dismounting and walking is not a symbol of insufficient ability, but rather the normal result of a route whose design (or rather, terrain constraints) approaches the physiological limits of most humans. The third theme relates to “equipment lessons.” Many riders who have completed the climb advise future challengers to prepare gearing one step lighter than what they think is sufficient. This advice appears repeatedly across nearly all related accounts and deserves serious consideration.

A Taiwanese Rider’s Perspective: Translating Your Ability

Route types like the Alto de Hazallanas—“short and extremely steep”—can actually be found in similar forms in Taiwan. Not the famous scenic climbs, but the steep farm roads scattered across mountainous areas, known only to local riders, with some sections whose gradients are in no way inferior to the Alto de Hazallanas. If you have suffered on this type of local Taiwanese steep climb and experienced the helplessness of your cadence dropping to the edge of its limit, you will be relatively mentally prepared for the challenge profile of the Alto de Hazallanas. However, if your climbing experience mostly comes from longer routes with gentler gradients (such as the Beiyi Highway or the western approach to Wuling—routes that are long but relatively uniform in gradient), the impact of the Alto de Hazallanas will be especially severe—it tests an entirely different ability: short-duration maximum power output and low-speed handling stability, rather than long-duration endurance management. In fact, comparing the Alto de Hazallanas with the western approach to Wuling reveals an interesting contrast: Wuling challengers face a multi-hour war of attrition requiring meticulous energy management, while Alto de Hazallanas challengers face a brief but intensely concentrated “explosive power test.” The muscle groups and energy systems trained by the two are completely different—the former relies more on aerobic endurance and long-duration pacing management, while the latter is closer to a limit test of anaerobic threshold and short-duration maximal oxygen uptake. This is also why some long-distance endurance riders can struggle on extreme short climbs like the Alto de Hazallanas, while some riders who specialize in short-duration explosive power training (such as mountain bike cross-country or short time trials) can perform exceptionally well on this type of route.

On the practical side of actually going to ride it: since this type of non-official race route lacks comprehensive signage systems and regular maintenance, it is recommended to confirm the actual route and road conditions through GPS track-sharing platforms or rider communities before attempting it, to avoid accidents from taking the wrong path or inadvertently entering unpaved roads. These routes typically have no feed points along the way, so be sure to bring sufficient water and energy supplies before departing. Since the route is relatively obscure, it is recommended to schedule it as one day within a Granada or Sierra Nevada itinerary, combined with other famous climbs (such as the aforementioned Pico Veleta). This allows you to experience the diverse facets of local road cycling culture while also cross-training across different intensity route types, making the training benefits of the entire trip more complete.

Safety Reminder

The greatest risk on extreme climbs like the Alto de Hazallanas is loss of balance at low speed—when the gradient approaches or exceeds 20%, the bike’s weight distribution is completely different from normal riding conditions. Front-wheel traction can weaken due to rearward weight shift, and especially when cadence drops to the critical threshold and speed approaches zero, the risk of tipping over increases significantly. It is recommended to practice very-low-speed balance techniques on relatively safer, gentler gradients before attempting the climb. Equal vigilance is required on the descent—extremely steep gradients subject the braking system to far greater heat loads than normal road conditions. It is recommended to brake intermittently rather than continuously to avoid reduced braking performance from overheated rotors or brake pads. Since these routes see little traffic and lack formal rescue mechanisms, it is recommended to inform riding partners or family of your complete itinerary and to consider tackling the remote farm-road climbs with companions rather than alone. If you experience warning signs requiring medical attention during extremely high-intensity output—such as chest tightness, abnormal palpitations, or blurred vision—stop immediately and seek help nearby. The advice in this article is for reference only and cannot replace professional medical evaluation. Individual differences in such extreme challenges are enormous; progress gradually and never attempt recklessly without sufficient steep-climb riding experience. Seniors and those with a history of cardiovascular disease or joint-related conditions should consult medical professionals before attempting this type of climb with its instantaneous high loads and low-speed high-torque demands, to assess whether their knee joints and cardiovascular systems can withstand this unique stress profile.

Key Takeaways

• The Alto de Hazallanas is approximately 5.5 km long with about 650 meters of total elevation gain; commonly cited average gradients fall between 11% and 13%, making it one of the steepest short road climbs in Spain, but it is not an official race segment, and figure discrepancies are greater than for other well-known climbs.
• The route has virtually no warm-up section and can be roughly divided into three segments: double-digit gradients from the start, a continuous steep core in the middle, and a final section that often saves the steepest gradients for last.
• Under physical model estimates, even an advanced rider at 3.0 W/kg averages under 8 km/h for the entire route; the time investment is not necessarily small, but the suffering density is far higher than a typical long climb; instantaneous power demands on the steepest local sections can approach or exceed 6 W/kg.
• Gearing must be set up more conservatively than for a typical long climb to avoid being forced to dismount on the steepest sections due to excessively low cadence.
• Lacking signage and en-route feed points, confirm GPS tracks and road conditions before attempting, and bring sufficient supplies.
• Low-speed handling on extreme gradients and brake system overheating on descents are the primary risks; ride with companions and practice very-low-speed balance techniques in advance.
• The energy systems tested by this type of route are completely different from long-distance endurance climbs; prepare with targeted training for anaerobic threshold and short-duration maximum power output.
• It is recommended to plan the trip alongside other nearby famous climbs (such as Pico Veleta) to experience the diverse facets of Andalusian road cycling culture and maximize training benefits.

Related Reading

• 13 Kilometers into Hell: Why the Alto de l’Angliru Is Called the Scariest Climb of the Vuelta
• Complete Guide to Alishan Highway: Southern Taiwan’s 53.57 km, 2,000+ Meter Endurance Pilgrimage
• Paterberg: The 360-Meter Wall of Hell, Flanders’ Killer Final Blow
• How Steep Is 1 in 3 Really? A Full Analysis of the UK’s Most Brutal Climb, Hardknott Pass