4.3
(3)
36
riders
3
rides
Mountain biking around Lac du Portillon offers routes through a high-altitude lake region characterized by mountain passes and varied terrain. The area provides challenging ascents and descents suitable for experienced riders. Trails often navigate through alpine landscapes, transitioning from forested paths at lower elevations to more mineral and rocky terrain as they ascend towards the lake and surrounding peaks. This diverse environment ensures a varied riding experience with different surfaces and technical demands.
Last updated: July 4, 2026
3
riders
27.8km
03:40
1,260m
1,270m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.5
(2)
11
riders
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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4.0
(1)
17
riders
Hard mountain bike ride. Great for any fitness level. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
5
riders
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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Lovely stop at the Hospital Plains!
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Check if the valley is going to be crossed at the Ixeia camping site
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Coming from the largest natural lake (not dammed) in the entire Pyrenees, it is normal for this ravine to always descend with abundant water.
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The GR 11 has more than one variant as it passes through the Benasque valley, offering different ways to cross it. The GR 11.5 variant passes through the Acampament area, a continuation of the Plans dels Banys and Turpí, where the campsite and hotel of the same name is located. These plains are old glacial lakes that filled up over time and were areas that were used to set up summer camps for centuries, something that is now absolutely prohibited outside the campsites. The Natural Park regulations only allow free camping above 2,000 m, as long as there is no shelter less than 500 m away.
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It is worth crossing the wooden bridge and entering the beech forest in a second, shorter loop that many people skip but which is truly beautiful at all times of the year.
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The historic spa of Baños de Benasque was active from the beginning of the 16th century until 2019, when it was permanently closed. The use of the water from these baths has been documented since 1522, when the Benasque apothecary Francisco Frigoiti administered them. In 1801 the first building was built, which was successively improved and expanded over time, including a reconstruction after the Spanish Civil War, when the building was burned. The difficulties of maintaining road access during the winter months and the cost of renovating the current buildings led to its closure in 2019.
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Mountain biking around Lac du Portillon is primarily characterized by moderate to difficult routes. The terrain often includes challenging ascents and descents through high-altitude alpine landscapes and mountain passes, making it suitable for experienced riders.
While the region is known for its more challenging terrain, some routes offer sections that might be manageable for riders with basic experience. However, the overall network focuses on moderate to difficult trails, so true beginner-specific routes are less common. It's best to check individual route details for elevation and technical demands.
Advanced mountain bikers will find significant elevation changes and varied terrain, including demanding climbs and technical descents through mountain passes and alpine valleys. Routes like the Peyresourde Pass – Peyresourde Pass loop from Granges d'Astau, which covers 17.4 miles with over 1200 meters of elevation gain, offer a substantial challenge.
Yes, several routes in the area are designed as loops. For example, the Puente de Cubera – Baños de Benasque Hot Spring loop from Benasque is a moderate 13.3-mile circular path, and the Benasque Village Center – Castejón de Sos loop from Aparcamiento de Estós is a longer 28.2-mile loop through mountain valleys.
Route durations vary significantly based on distance, elevation, and rider pace. For instance, a moderate 13.3-mile route like the Puente de Cubera – Baños de Benasque Hot Spring loop from Benasque can take around 2 hours, while a difficult 17.4-mile trail such as the Peyresourde Pass – Peyresourde Pass loop from Granges d'Astau might take closer to 3 hours 40 minutes.
Many trailheads, especially those starting from villages or popular access points, offer designated parking areas. For example, routes like the Benasque Village Center – Castejón de Sos loop often start from locations with available parking, such as Aparcamiento de Estós. It's advisable to check specific route descriptions for detailed parking information.
Given the region's focus on moderate to difficult terrain with significant elevation changes, truly family-friendly trails suitable for young children or absolute beginners are limited. Most routes require a good level of fitness and mountain biking experience. Families with older, experienced riders might find some moderate sections enjoyable.
The best time for mountain biking around Lac du Portillon is typically during the late spring, summer, and early autumn months (roughly June to October). During this period, the high-altitude trails are generally free of snow, and the weather conditions are more stable and pleasant for riding. Always check local weather forecasts before heading out.
Mountain biking in winter around Lac du Portillon is generally not recommended due to heavy snowfall at high altitudes. Many trails become impassable or require specialized winter equipment and expertise. The region is known for its alpine conditions, so winter riding is often limited or impossible on most routes.
Due to its high-altitude nature, weather around Lac du Portillon can change rapidly. Expect cooler temperatures, especially at higher elevations, and be prepared for sudden shifts including rain, strong winds, or even unexpected snowfall, even in summer. Always carry appropriate layers and check the forecast before your ride.
While some routes may pass through or near villages like Benasque, which offer cafes and restaurants, many trails traverse remote alpine areas. It's always best to carry sufficient water and snacks, especially on longer routes. Plan your stops in advance if you rely on external refueling points.
The mountain bike trails around Lac du Portillon are highly rated by the komoot community, with an average score of 3.75 stars from over 5 reviews. Riders often praise the diverse terrain, challenging ascents, and the stunning alpine scenery encountered on routes through mountain passes and high-altitude lakes.
The entire Lac du Portillon region, being a high-altitude area with mountain passes, offers numerous panoramic viewpoints. Trails often provide breathtaking vistas of alpine lakes, rugged peaks, and expansive valleys. Specific viewpoints are often found at the summits of passes or along ridge lines, offering spectacular photographic opportunities.


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