4.6
(87)
2,446
riders
18
rides
Mountain bike trails around Lac de Mar are situated in the high-altitude Val d'Aran region of the Pyrenees, characterized by a mountainous topography and glacial formations. The area features challenging terrain with significant elevation gains and technical descents, set amidst a landscape of glacial lakes and high mountain peaks. Riders can expect diverse routes that traverse alpine environments and dense coniferous forests, offering varied experiences for mountain biking.
Last updated: May 7, 2026
4.7
(3)
180
riders
21.1km
02:31
870m
870m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
3.5
(2)
113
riders
27.4km
02:54
840m
840m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

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5.0
(5)
85
riders
28.0km
02:28
840m
840m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
5.0
(4)
78
riders
24.2km
02:22
730m
730m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(1)
81
riders
16.1km
02:06
750m
760m
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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Spectacular landscapes, 360º views everywhere you look is worth it.
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In fact, for the Aranese of the Val d'Aran, the real source, the Uelh dera Garona (eye of the Garonne), is located in the pastures of Plã de Béret, near the Baqueira Beret ski resort, therefore after Viehla BUT according to Norbert Casteret (search for the source with dyes in the 1930s), the main source is located to the east of the Maladeta massif, in Aragon, from the northern and eastern snowfields of the Aneto peak, whose water rushes into the Forau d'Aigualluts or Toro hole (altitude: 2,074 m), to change valleys by a resurgence at the Uelhs de Joeu (Eyes of the Jew) (at 1,658 m). It is at Plan dera Artiga de Lin (at the bottom of the small, almost uninhabited valley starting after the village of Es Bordes (instead of continuing on Viehla, leave the road on the right at Es Bordes to enter this small valley at the bottom of which is the resurgence)
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This viewpoint offers an incredible view with Montcorbison and Port de Vielha in the background.
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The Nere river is one of the rivers that falls from the southern side of the Vall d'Aran mountains and collects the waters of the set of mountains, as is the case of Molieres. A river that enters from the south of the city and that crosses it with cold waters.
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Beautiful church that is located in the town of Guasach and that forms one of the towns close to the capital, Vielha. From the road that takes us straight to the church itself, you can see impressive views of the valley and the city of Vielha as a whole.
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If you like mountain biking and narrow trails, you will love this route through the Garonne. It is a path with spectacular views of the riverbed and very easy to navigate.
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Beautiful picture of the Pyrenees.
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The mountain biking around Lac de Mar is characterized by its high-altitude Pyrenean setting, featuring challenging terrain with significant elevation gains and technical descents. You'll ride through diverse landscapes, from dense coniferous forests to stark alpine environments with glacial lakes and high mountain peaks. The area offers a mix of moderate paths and difficult routes with technical sections.
Yes, the Lac de Mar area offers a variety of trails for different abilities. While many routes are challenging and require good fitness, there are also moderate options. For example, the Arties – Sant Julià de Garós Church loop from Garòs is a moderate trail, while the Trail along the Garona River – Bassa d'Oles loop from Garòs is considered difficult.
Riding around Lac de Mar, you'll encounter stunning alpine landscapes. Lac de Mar itself is a beautiful glacial lake at 2,248 meters, featuring a small island called Unhòla. You'll also see impressive peaks like Tossau de Mar, Estany Negre, and the Agujas de Travessani. Some routes pass by the Estanh dera Restanca, fed by a powerful waterfall.
Yes, many of the routes around Lac de Mar are loops. For instance, you can explore the Garonne River – Vielha Viewpoint loop from Casarilh, which offers panoramic views, or the Sant Julià de Garós Church – Nere River in Vielha loop from Garòs.
Given its high-altitude glacial environment, the best time for mountain biking around Lac de Mar is typically during the warmer months, from late spring to early autumn. This avoids snow and ice, ensuring trails are accessible and conditions are more favorable for riding in the Pyrenees.
Yes, the region has mountain refuges that provide essential services. Refugi de la Restanca, located near Estanh dera Restanca at 2010 meters, offers hot showers, food, drinks, and accommodation for up to 80 people. Refugi Ventosa i Calvell is another refuge in the vicinity, offering a place to rest and resupply.
The mountain bike trails around Lac de Mar are highly regarded by the komoot community, with an average rating of 4.6 stars from over 80 reviews. Riders often praise the stunning glacial landscapes, the challenging nature of the routes, and the diverse terrain that makes for an engaging experience.
Access to the Aigüestortes i Estany de Sant Maurici National Park, where Lac de Mar is located, can be challenging with public transport, especially with a mountain bike. It's advisable to research specific bus services to nearby towns like Vielha or Garòs and then plan for onward travel, potentially by taxi or shuttle, to trailheads like Pònt deth Ressec.
For routes accessing the higher areas around Lac de Mar, parking is often available at points like Pònt deth Ressec. It's recommended to check specific trailhead information for parking availability and any potential fees, especially within the national park's peripheral zone.
Absolutely. The Lac de Mar region is known for its mountainous topography and significant elevation gains. For example, the route to Lac de Mar from Pònt deth Ressec involves a substantial climb of 976 meters. Many of the listed routes, such as the Nere River in Vielha – Garonne River loop from Casarilh, also feature considerable ascents and descents.
While the Aigüestortes i Estany de Sant Maurici National Park has regulations regarding dogs, typically they are allowed in the peripheral zone on a leash. However, specific rules can vary for mountain bike trails. It's best to check the current regulations with the park authorities before planning your ride with a dog.


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