The Marmot Trail
- Departure: Cavallers Reservoir
- Arrival: "Ventosa i Calvell" refuge
- Distance: 5,50 km
- Duration: 2h15 m
- Degree of difficulty: 350m
- Dificultad: Demanding
- Type of route: Linear
- Suitable for MTB: No
- Best time of year: All year
* Degree of difficulty obtained by SENDIF method
You have to be very careful with sudden changes in weather. There is "Ventosa i Calvell" shelter on Estany Negre, who provides food and lodging services during the months of most influx of visitors from all the Pyrenees.
* In the summer (from 21 June to 30 September) there is a public transport service, known as the Bus del Parc, or Park bus, that links the L’Alta Ribagorça trails with neighbouring regions. The service consists of 4 bus routes that run daily between the valleys
of Boí and Espot via the Val d’Aran.
