5.0
(3)
829
runners
44
runs
Jogging around Gaztelu offers a diverse landscape characterized by significant elevation changes and varied terrain. The region features numerous summits, including the Urdelar Summit at over 2000 meters, alongside extensive forested areas. Running routes often traverse hilly landscapes and include loops around local towns, providing a mix of natural and urban environments.
Last updated: July 5, 2026
57
runners
43.1km
07:15
2,510m
2,510m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
54
runners
16.8km
02:44
950m
950m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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5.0
(1)
50
runners
24.0km
03:46
1,130m
1,130m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(1)
45
runners
9.99km
01:35
590m
590m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
24
runners
26.0km
03:54
1,200m
1,200m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
17
runners
20.7km
03:37
1,160m
1,160m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
13
runners
12.2km
01:19
180m
180m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
10
runners
9.02km
01:06
260m
260m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
6
runners
8.67km
01:14
340m
330m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
4
runners
11.9km
01:37
420m
420m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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Point before reaching the summit of Ernio. The pilgrimage takes place on Sundays in September. At this point, the hermit who sells cowbells and ribbons stands.
1
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Scene of a famous battle, in the middle of a large field and surrounded by a herd of horses.
4
0
It is a modest peak, but it is difficult to reach from the Izaskun neighbourhood. You have to be a little careful not to slip in the last few metres of the north face.
4
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One of the most visited places by the inhabitants of Tolosa and its surroundings.
4
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Right where the antennas are, and very close to the San Lorenzo hermitage.
3
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In a mysterious, and even a little gloomy, pine forest.
2
0
Tolosa is a jewel of the Basque Country that stands out for its historical, cultural and gastronomic heritage. Its old town, the Plaza Nueva, the medieval bridge and the Parque de Aranzazu are some of its main attractions. Tolosa is also an excellent starting point to explore the surrounding nature, with beautiful mountains and trails.
2
0
This trail just below the Belabieta peak is very pretty. It has open fields and beautiful views. So if you don't make it to the top, you still have a good experience.
1
0
Gaztelu offers a wide selection of running trails, with over 45 routes available for you to explore. These routes cater to various fitness levels, from moderate forest loops to challenging long-distance trails.
Yes, while many routes in Gaztelu feature significant elevation changes, there are options suitable for beginners. For example, the Harizti-baso misto atlantikoa loop from Tolosa is a moderate 4.0-mile (6.4 km) trail that takes you through an Atlantic mixed forest, offering a less strenuous experience.
Running in Gaztelu means encountering diverse terrain. You'll find routes traversing hilly landscapes, dense forested areas, and paths that include significant summit ascents. The region is known for its elevation changes, offering a mix of natural and sometimes urban environments as routes loop around local towns.
Absolutely. Gaztelu is well-suited for experienced runners looking for a challenge. The Ernio loop from Tolosa-Centro is a difficult 14.6-mile (23.6 km) trail with substantial climbs and panoramic views. Another demanding option is the Urdelar Summit (2049 m) loop from Tolosa-Centro, covering 22.8 km with over 1000 meters of elevation gain.
Yes, many of the running routes in Gaztelu are circular, allowing you to start and finish at the same point. Examples include the Tolosa Old Town loop from Tolosa-Centro, which is a moderate 9.0 km route, and the more challenging Uzturre – Uzturre loop from Tolosa-Centro.
Gaztelu's hilly landscape and numerous summits offer many opportunities for scenic views. Routes like the Berástegui – Larre Summit loop from Berastegi provide expansive vistas from Larre Summit after a challenging ascent. The Ernio loop from Tolosa-Centro is also known for its panoramic views.
The running routes in Gaztelu are highly rated by the komoot community, with an average score of 5.0 stars. Runners often praise the challenging summit ascents, the beauty of the dense forest paths, and the variety offered by circular routes that explore both natural and urban surroundings.
Yes, several routes in Gaztelu offer a blend of natural landscapes and urban settings. The Tolosa Old Town loop from Tolosa-Centro is a great example, allowing you to experience both the natural surroundings and the charm of the historic town.
Gaztelu's running trails are predominantly challenging, with 29 routes rated as difficult and 16 as moderate. There is also one easy route. This indicates that most trails involve significant climbs and varied terrain, making them ideal for runners seeking a good workout.
While specific marking details vary by route, komoot users generally find the trails navigable. It's always recommended to download the route offline on your komoot app to ensure you stay on track, especially on less-trafficked paths.
Given the region's diverse network of trails, it's possible to find less crowded options, especially on weekdays or during off-peak hours. Exploring some of the lesser-known moderate routes, or those slightly further from main towns, might offer a more solitary running experience.


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