Casillas – El Abuelo loop from Casillas

Hiking trails & Routes

Casillas – El Abuelo loop from Casillas

Hard

4.7

(6)

hikers

Casillas – El Abuelo loop from Casillas

06:51

19.8km

740m

Hiking

Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required. The starting point of the route is accessible with public transport.

Last updated: August 1, 2026

Waypoints

Start point

Bus stop

Get Directions

420 m

Casillas

Highlight • Settlement

Casillas is a municipality in the province of Ávila, located at an altitude of 1012 m, at the beginning of the Tiétar valley. It is surrounded by an extensive forest of chestnut and oak trees.

If you want to know its resin past, I recommend visiting the ethnographic museum of Resin, which has two exhibitions, in two large resin huts.

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3.81 km

Puerto de Casillas – Entrance to the Valle de Iruelas Nature Reserve

Highlight • Mountain Pass

The ascent to the port of Casillas is one of the simplest and most essential hiking routes in this part of the Central System.

The port of Casillas is one of the entrances to the Valle de Iruelas Natural Reserve, where if we choose a clear day, we will be able to contemplate a wide landscape, not only a large part of the Natural Reserve with the Burguillo Reservoir in the background over the waters of the Alberche river, but also the Sierras de la Paramera on the horizon and the first foothills of the western Madrid mountains.

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7.63 km

El Tiemblo Snow Well

Highlight • Monument

Old construction that represented a well where food was stored for all the inhabitants of this area of the Sierra de Gredos. The place is preserved and beautiful!

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10.1 km

Las Barrancas Picnic Area

Highlight • Rest Area

Picnic area with lots of shade. It has stone tables and a fountain.

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11.3 km

El Abuelo

Highlight • Natural Monument

11.4 km

Castañar del Tiemblo

Highlight • Forest

The San Gregorio Trail ends at the El Regajo recreational area. The trail crosses directly the forest track and enters the most famous chestnut grove in Alto Alberche. Along the way there is an information booth and information panels where the short-distance path PR-AV 54 begins, which runs through the forest in a circular itinerary. The environment changes completely, the previous pine forest gives way to a uniform mass of chestnut trees with some hundred-year-old and monumental specimens, such as the ancient chestnut tree known as El Abuelo, near the Majalavilla Refuge. The route goes up between the chestnut trees and at the first fork it continues straight ahead. The PR-AV 54 path continues to the right towards the Majalavilla Refuge.

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11.7 km

The Grand Chestnut of El Tiemblo

Highlight • Natural Monument

The most spectacular chestnut grove in the downtown area.
Be careful to access the parking lot of the castañar you have to pay, €6 per car + €2 for each occupant.

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