4.6
(366)
2,435
hikers
79
hikes
Hiking in Montes Obarenes-San Zadornil offers diverse landscapes at the southernmost foothills of the Cantabrian Mountains, acting as a natural barrier over the plains of La Bureba. The region is characterized by dramatic gorges carved by rivers like the Ebro, Oca, and Purón, alongside varied forest ecosystems where Atlantic and Mediterranean species intermingle. Hikers encounter limestone crests, vertical walls, and a rich blend of arboreal species across approximately 33,064 hectares.
Last updated: May 10, 2026
4.6
(16)
48
hikers
8.34km
02:21
170m
170m
Hike a moderate 5.2-mile (8.3 km) circular route from Frías to Tobera, exploring historic towns and waterfalls in Montes Obarenes-San Zadorn
3.0
(2)
18
hikers
Moderate hike. Good fitness required. Mostly accessible paths. Sure-footedness required.

Sign up for free
3.0
(1)
13
hikers
14.9km
05:04
630m
640m
Hike the difficult 9.3-mile (14.9 km) Ascent to Humión circular route from Cubilla de la Sierra for panoramic views and 2075 feet of gain.
3.7
(3)
12
hikers
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
12
hikers
19.1km
06:04
760m
760m
Hike the difficult 11.9-mile Por la Mesa de Oña Trail, gaining 2499 feet in Montes Obarenes-San Zadornil Natural Park for panoramic views.
Get access to more routes and recommendations from other explorers.
Sign up for free
Already have an account?
Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Start today with a free account
Your next adventure awaits.
Login or Signup
Popular around Montes Obarenes-San Zadornil
Endless valleys and historic villages – Route of the Senses (GR 85)
Mountains with tradition in Spain’s Basque Country – Shepherd's Path (GR 282)
Road Cycling Routes in Montes Obarenes-San Zadornil
MTB Trails in Montes Obarenes-San Zadornil
Cycling in Montes Obarenes-San Zadornil
Running Trails in Montes Obarenes-San Zadornil

Gravel biking in Montes Obarenes-San Zadornil
The truth is that the horizon is tremendous.
1
0
The Hermitage of Our Lady of the Sickle is nestled beneath the cliff, reached by crossing the small bridge over the Molinar River. Dating from the 13th century, it features both Romanesque and Gothic elements and has an arched portico offering fine views of the surrounding area. At its base stands a second, much smaller hermitage, dating from the 17th century, which houses an altar dedicated to Christ of the Remedies.
1
0
Near the center of Frías...easy to see
0
0
Views of the Tobera waterfall
2
0
Several waterfalls and areas to see in Tobera
1
0
The best idea for after eating at one of the town's restaurants.
2
0
One of the many places where the silhouette of the town is impressive.
3
0
In the northern part of the town, it is worth a visit.
2
0
Montes Obarenes-San Zadornil offers a wide variety of hiking experiences with nearly 80 marked trails. These range from easy paths suitable for a leisurely stroll to more challenging routes for experienced hikers.
The park is characterized by diverse terrain, including dramatic gorges carved by rivers like the Ebro, Oca, and Purón. You'll also find limestone crests, vertical walls, and a unique blend of Atlantic and Mediterranean forest ecosystems, offering varied landscapes from dense woodlands to panoramic mountain views.
Yes, Montes Obarenes-San Zadornil has 19 easy trails perfect for beginners or families. These routes allow you to enjoy the natural beauty without significant difficulty. For example, the Revillallanos y Valdelamediana — circular through the Valderejo Natural Park is a moderate option that can be enjoyed by those looking for a slightly longer but still accessible walk.
The park is rich in natural features. You can explore the stunning gorges, such as the Oña Gorge, or enjoy panoramic vistas from various peaks. The View of the Ebro River from Mirador de San Martín de Don offers a breathtaking perspective of the river's course through the landscape. The highest point, Pan Perdido, also provides expansive views.
Yes, many trails in Montes Obarenes-San Zadornil are circular, allowing you to start and end at the same point. The Revillallanos y Valdelamediana — circular through the Valderejo Natural Park is one such route, offering a moderate 7.5 km loop.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 200 reviews. Hikers often praise the dramatic gorges, the unique blend of Atlantic and Mediterranean forest ecosystems, and the opportunities for panoramic views from limestone crests and mountain peaks.
Absolutely. The region is dotted with charming medieval villages and historical constructions. Notable examples include Oña, known for its medieval monastery of San Salvador, and Frías, with its challenging castle and fortified bridge over the Ebro River. These sites offer a cultural dimension to your hiking experience.
The park's diverse ecosystems mean it offers beauty throughout the year. Spring and autumn are particularly pleasant for hiking, with mild temperatures and vibrant colors in the forests. The unique blend of arboreal species, from beech to holm oaks, provides a rich visual experience in these seasons.
Yes, the mountainous terrain of Montes Obarenes offers several trails leading to peaks. The Montes Obarenes form a significant natural wall, with its highest point being Pan Perdido at 1,237 meters. Other notable summits include Humion and El Cueto, providing challenging hikes with rewarding panoramic views.
Montes Obarenes-San Zadornil is home to a rich biodiversity, including 128 cataloged vertebrate species. You might spot mammals like roe deer, wild boar, or even a wildcat. The rocky cliffs are nesting sites for numerous raptors, such as golden eagles, Bonelli's eagles, and griffon vultures, making it an excellent area for birdwatching.
Yes, for experienced hikers seeking a challenge, there are several difficult routes. The Por la Mesa de Oña Trail is a demanding 19.1 km route that takes over 6 hours to complete, offering significant elevation changes and expansive views.


Browse the best Hikes in other regions.