Reserva Natural del Valle de Iruelas
Reserva Natural del Valle de Iruelas
4.7
(7)
501
runners
87
runs
Jogging routes around Reserva Natural del Valle de Iruelas traverse a diverse mid-mountain landscape in the Sierra de Gredos, featuring elevations from 730 meters up to 1,950 meters. The region is characterized by varied forests, including black pine, laricio pine, oak groves, and the extensive chestnut grove of El Castañar de El Tiemblo. Numerous mountain streams, such as the Iruelas stream, and the Burguillo Reservoir add to the scenic beauty and provide varied terrain for running.
Last updated: May 11, 2026
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
11
runners
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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5
runners
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
27
runners
22.3km
03:53
1,110m
1,100m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5
runners
15.3km
02:22
770m
760m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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Popular around Reserva Natural del Valle de Iruelas
phenomenal
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A nice climb from the El Burguillo reservoir. The first part is asphalt in very good condition (as of November 1, 2025), and the second part is a dirt track, also in very good condition. It's a demanding climb; the asphalt section offers some flatter sections, but the dirt track is practically a continuous gradient of around 10%.
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1
Simple and very beautiful route for all levels on bike or foot.
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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.
3
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Path that offers good views of the slopes between forests and some fields of pasture!
1
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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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From the top of this mountain you can see impressive views of the whole area and a stop there is mandatory. The last highest mountain of the eastern end of the Sierra de Gredos.
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There are nearly 90 running routes available in Reserva Natural del Valle de Iruelas, catering to various fitness levels. You'll find options ranging from easy paths to challenging mountain trails.
Yes, while many routes are moderate to difficult, there are 9 easy running paths available. These are perfect for beginners or those looking for a more relaxed jog through the natural beauty of the reserve.
The routes traverse a diverse mid-mountain landscape, offering stunning views of the Sierra de Gredos. You'll run through varied forests, including ancient black pine and laricio pine, oak groves, and the renowned chestnut grove of El Castañar de El Tiemblo. Many trails also feature scenic mountain streams and views of the Burguillo Reservoir.
Yes, many routes in the reserve are circular, allowing you to start and end at the same point. A popular option is the Burguillo Reservoir – El Burguillo Reservoir loop from El Tiemblo, a moderate 10.8 km path. Another challenging circular route is the Ascent to Alto del Mirlo through the Castañar del Tiemblo — circular route through the Pozo de la Nieve.
You can encounter several interesting sights. The El Abuelo Chestnut Tree and The Grand Chestnut of El Tiemblo are magnificent natural monuments. The Puerto de Casillas offers panoramic views, and you might also pass the historic El Tiemblo Snow Well.
Absolutely! Reserva Natural del Valle de Iruelas is a Special Protection Area for birds and home to the largest colony of black vultures in Castilla y León. You might also spot other raptors like the Iberian imperial eagle, as well as deer, roe deer, and wild boars, especially during quieter times of day.
Yes, the reserve offers a variety of trails, including easier options that are suitable for families. Look for the 9 easy-rated routes to find paths that are less strenuous and more enjoyable for all ages.
The running routes in Reserva Natural del Valle de Iruelas are highly rated by the komoot community, with an average score of 4.7 stars from 7 reviews. Runners often praise the diverse terrain, stunning natural beauty, and the challenge offered by the mountainous paths.
Many routes provide excellent viewpoints due to the mountainous terrain. The Alto del Mirlo (Pico Casillas) – Pozo de la Nieve Shelter loop from Puerto de Casillas is known for its notable viewpoints. Panoramic views of the entire valley can also be enjoyed from natural viewpoints such as Puerto de Casillas.
The reserve offers beautiful scenery year-round. Spring and autumn provide pleasant temperatures and vibrant colors, making them ideal for running. Summer mornings are also great to avoid the heat, while winter can offer a unique, serene experience, though some higher trails might require more preparation due to snow or ice.
Definitely. For experienced runners seeking a challenge, routes like the Alto del Mirlo (Pico Casillas) loop from Casillas, which spans 22.1 km with significant elevation gain, are perfect. The reserve features 43 difficult-rated routes, ensuring plenty of options for demanding workouts.
While specific parking details for every trailhead are not provided, areas like Castañar de El Tiemblo and Puerto de Casillas, which serve as starting points for several popular routes, typically offer parking facilities for visitors accessing the reserve.


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