Geoparque Unesco

The Glaciers Trail

When exploring the high reaching valleys of the Rivers Ara, Cinca and Cinqueta and their respective tributaries, you'll be able to observe the characteristic relief patterns left by successive layers of the Quaternary period glaciers. Whether it's trough valleys, moraine deposits, glaciolacustrine deposits, tarns, striking rock formations or the last glaciers on the north face of Monte Perdido, you'll find these and many other gems along the way on the Sobrarbe-Pirineos Geopark glacial valleys trail.

Day 1

ROUTE: Aínsa - Ara Valley - Broto Valley - Linás de Broto

TYPE OF ROUTE: A linear route by car from Aínsa to Linás de Broto (there and back on the same road).

It includes short walks to the information tables:

We recommend you download the GR 8 Iron Age Elements. Viu - Sorrosal Geo-Route from the Geopark website to get all the geological details.

STARTING POINT: From Aínsa take the N-260 West towards Linás de Broto.

1st STOP: Linás de Broto.

In Linás de Broto, between the church and the first houses in the village and opposite the drinking trough, take the path that leads to Information Table 6. The legacy of ice. Go back to the start point and drive to the village of Viu.

Geological information:

Table 6. The legacy of ice

Linás de Broto.

2nd STOP: Viu - Fragen - Broto.

Starting point: On the N-260 which runs between Broto and the Cotefablo pass, close to Km. 484,5 is the campsite car park at Viu. From there head to Viu.

  • Route: Viu-Fragen-Broto, taking the El Pueyo path (PR HU-127).
  • Type of route: Linear (return along the same route).
  • Difficulty level: Low. This is not a difficult path, but the second part (between stops 3 and 5) has a very steep drop in a short distance, uncharacteristic of such a low level route.
  • Duration: One and a half hours there. The return leg, being uphill needs two hours.
  • Length: 5 kilometres (one way).
  • Gradient: 400 metres down (only one way).
  • Geo-Route description and geological information: GR 8 Iron Age Elements. Viu - Sorrosal.

Fragen.

Panoramic views of the Sorrosal Waterfall from the "El Pueyo" viewpoints.

Sorrosal Waterfall from the "El Pueyo" viewpoints.

3rd STOP: Broto.

In Broto take the footpath that goes to the information Table 5. A geological race. Sorrosal Waterfall.

Geological information:

Table 5. A geological race. Sorrosal Waterfall.

Table 5. A geological race.

Sorrosal Waterfall.

Day 2

ROUTE: Aínsa - Bielsa - Pineta Valley - Aínsa

TYPE OF ROUTE: A linear route by car between Aínsa and Pineta Valley (there and back on the same road).

This includes the PN5 Pineta - Valle de La Larri Geo-Route.

1st STOP: Pineta Valley - La Larri

  • Starting point: Starting from the Pineta car park at the end of the road near the Parador Hotel, take the path towards the La Larri Valley following the PN 5 Pineta - La Larri Valley Geo-Route.
  • Type of route: Linear (return along the same route).
  • Difficulty level: Low.
  • Duration: 2 hours out and 1 hour return.
  • Length: It's 3,2 Km from the Parador Hotel to "Los Llanos".
  • Gradient: 500 metres.
  • Geo-Route description and geological information: PN 5 Pineta -La Larri Valley.

Pineta Valley.

The Cinca Waterfall.

2nd STOP: Geopark Sobrarbe-Pirineos Visitor Centre in Ainsa Castle

For a good over-view of the Sobrarbe-Pirineos Geo-park's general characteristics, pop in to the Geopark Visitor Centre, in Ainsa castle.

Geo-Route description and geological information:

GR 1 Sobrarbe Geopark Space.

The entrance to the Geo-park visitor centre in the south-east tower of Ainsa Castle.

Day 3

ROUTE: Aínsa - Chistau Valley - Ibón de Plan (Basa de la Mora) - San Juan de Plan

TYPE OF ROUTE: A linear route by car between Aínsa and San Juan de Plan (there and back on the same road).

This includes the GR 18 The Jewel of Cotiella - Plan Glacial Lake Geo-route.

This includes a visit to the Posets-Maladeta Natural Park Visitor Centre, in San Juan de Plan as well.

1st STOP: Ibón de Plan, Basa la Mora

  • Starting point: Lavasar Refuge. Access by vehicle from Saravillo takes a forest track suitable for cars and subject to payment or you can be accessed on foot from Plan.
  • Route: Labasar Refuge-Plan glacial lake.
  • Type of route: Linear (return along the same route).
  • Difficulty level: Low. Being an elevated area there may be snow until well into spring.
  • Duration: 2 hours (there and back).
  • Length: 3,5 kilometres (there and back).
  • Gradient: 80 metre gradient upwards and downwards (there and back).
  • Geo-Route description and geological information: GR 18 The Jewel of Cotiella - Plan Glacial Lake.

Plan Glacial Lake (Basa La Mora). Photo by Nacho Pardinilla.

2nd STOP: Posets-Maladeta Natural Park Visitor Centre

Go to San Juan de Plan, where you'll find the Posets-Maladeta Natural Park Visitor Centre. For further information, please consult the following link:

Posets-Maladeta Natural Park Visitor Centre.

San Juan de Plan.

Avda. Ordesa 79. 22340 Boltaña. Huesca. 974 518 025.