GR 11 Trail to Respomuso Refuge

The trail begins at Embalse de la Sarra. You'll find parking available near the dam, which serves as the starting point for many routes in the area. It's advisable to arrive early, especially during peak season, as parking can fill up.

Public transport options to Embalse de la Sarra are limited. The nearest larger town is Sallent de Gállego, and while there might be some local bus services or taxis to the reservoir, it's generally recommended to travel by car for direct access to the trailhead.

Yes, dogs are generally allowed on this trail. However, as the route is within the Ordesa-Viñamala Biosphere Reserve, it's crucial to keep your dog on a leash at all times to protect wildlife and ensure the safety of other trail users. Always clean up after your pet.

No specific permits or entrance fees are required to run this trail to Respomuso Reservoir. However, the route is located within the Ordesa-Viñamala Biosphere Reserve, so please adhere to all general regulations regarding environmental protection, waste disposal, and respecting the natural habitat.

The best time to run this trail is typically from late spring (late May/early June) through early autumn (September/early October). During these months, the weather is generally more stable, and snow has usually melted from the higher sections. Autumn offers spectacular colors. Avoid winter due to snow, ice, and avalanche risk, which can make sections impassable or require specialized equipment.

The terrain is varied and demanding, suitable for experienced trail runners. Initially, it follows the Aguas Limpias river through pastures, but as you ascend, it becomes rockier and narrower. Expect forested areas, rocky slopes, and potentially wet sections, especially near the Barranco de Arriel during snowmelt. Higher up, around Respomuso Reservoir, it's high mountain terrain with rocky areas and possible snowdrifts outside of summer.

This trail is rated as difficult. It requires good to very good fitness and sure-footedness due to significant elevation gain and varied, often technical terrain. Some sections, like the 'Paso del Onso,' are narrow and exposed. While it's a trail run, be prepared to walk some of the steeper or rockier parts, especially if you're not accustomed to high-alpine running.

You'll experience stunning high-mountain landscapes, including views of impressive Pyrenean peaks like Fondellas (3,071m) and Balaitous (3,144m). The route passes by multiple waterfalls, beautiful Ibones (mountain lakes), and culminates at the spectacular Respomuso Reservoir. The cirque of Piedrafita also offers breathtaking panoramic views.

Yes, the route forms part of the well-known GR11, also identified as Senda Pirenaica - E27, which is a long-distance path traversing the Pyrenees. You'll also encounter sections of other local trails such as Sendero al Refugio de Respomuso-La Sarra and Sendero lagos de Arriel.

The primary facility along the route is the Refugio de Respomuso, located near the Respomuso Reservoir at an altitude of 2,200 meters. This mountain hut offers a valuable stop for rest, meals, and even overnight stays, making it a convenient option for longer excursions or multi-day trips. It's advisable to check availability and book in advance, especially during peak season.

While the one-way duration for jogging is approximately 1 hour 49 minutes, a full round trip from Embalse de la Sarra to Respomuso Reservoir and back, covering about 13.9 km with 706m of elevation gain, will typically take experienced trail runners around 3.5 to 4 hours, depending on pace, breaks, and conditions. For hikers, it can take over 5 hours, indicating the strenuous effort involved.