4.7
(24)
413
riders
18
rides
No traffic touring cycling routes in Montes Obarenes-San Zadornil traverse a landscape shaped by dramatic gorges and diverse mountain ranges. The region features deep canyons carved by rivers like the Ebro and Oca, alongside varied elevations from the Montes Obarenes foothills. Cyclists encounter a mix of dense forests, including beeches, holm oaks, and pines, and follow routes along tranquil rivers. This unique geographical position offers a rich variety of terrain for touring cyclists.
Last updated: June 2, 2026
4.6
(8)
34
riders
24.5km
02:17
370m
370m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
22
riders
40.7km
04:17
1,080m
1,070m
Hard bike ride. Very good fitness required. You may need to push your bike for some segments of this route.

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5.0
(2)
16
riders
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
12
riders
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
14
riders
38.7km
04:14
1,140m
1,140m
Hard bike ride. Very good fitness required. You may need to push your bike for some segments of this route.
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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.
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Built to span the Ebro River, this stone bridge is an impressive 143 meters long and features nine arches. The central section boasts a slender defensive tower, adorned with battlements and arrow slits, added in the 14th century. In medieval times, passage was controlled from this tower: anyone wishing to cross the bridge had to pay a toll of a few maravedís. The bridge offers one of the best views of the city of Frías.
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The Castle of the Dukes of Frías was declared a Site of Cultural Interest on April 22, 1949. It is situated on a rocky promontory overlooking the town and almost the entire Tobalina Valley. The oldest surviving remains date from the late 12th and early 13th centuries, but most of what remains is from the 15th century. Visitors can explore the large parade ground, part of the curtain wall, and the rampart walk, and climb the keep. Opening hours are daily from 10:30 a.m. to 2:00 p.m. and from 4:00 p.m. to 7:30 p.m., and the entrance fee is €2.
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Views of the Tobera waterfall
2
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Several waterfalls and areas to see in Tobera
1
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Beautiful medieval bridge over the Ebro River with views of Frias Castle
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One of the most beautiful bridges I know.
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There are 16 dedicated no traffic touring cycling routes in Montes Obarenes-San Zadornil, offering a variety of experiences for cyclists looking to explore the natural park away from vehicle traffic.
The routes in Montes Obarenes-San Zadornil feature a diverse terrain, ranging from undulating hills and forest tracks to sections along rivers like the Ebro. You'll encounter dramatic gorges, varied forests, and mountain ranges, providing a mix of challenging climbs and scenic stretches. The park's unique position between Atlantic and Mediterranean climates contributes to its varied landscapes.
While many routes offer varied difficulty, some sections of the extensive trail network are suitable for families. For a moderate option that explores historical towns, consider the Trespaderne – Oña Historic Town Center loop from Trespaderne, which is around 24 km long and features manageable elevation.
Cyclists can enjoy stunning vistas of dramatic gorges, such as those carved by the Ebro and Oca rivers. The park also offers diverse forests with beech, holm oak, and pine trees, creating picturesque backdrops. You might also encounter viewpoints overlooking the tranquil Ebro River with its well-preserved riparian forest. For a route featuring a specific natural highlight, the Tobera Waterfalls Viewpoint – Frías loop from Frías offers a chance to see the beautiful Tobera Waterfalls.
Yes, many of the no traffic touring cycling routes in Montes Obarenes-San Zadornil are circular, allowing you to start and end in the same location. Examples include the Trespaderne – Oña Historic Town Center loop from Trespaderne and the Frías Medieval Bridge – Hanging Houses of Frías loop from Frías.
The park is rich in cultural heritage. You can cycle through charming urban centers like Frías, known for its castle and picturesque houses, or Oña, home to the exceptional medieval Monastery of San Salvador. Specific highlights include the Oña Historic Center and the Church of St. James. The Oña Historic Center – Town Hall Arch loop from Oña is a great option to explore the town's heritage.
The transitional climate of Montes Obarenes-San Zadornil means spring and autumn generally offer the most pleasant conditions for touring cycling, with mild temperatures and vibrant natural scenery. Summer can be warm, especially in the gorges, while winter can bring colder temperatures and potentially snow at higher elevations.
The area is highly rated by the komoot community, with an average score of 4.66 stars from 21 ratings. Reviewers often praise the diverse scenery, the tranquility of the no traffic routes, and the blend of natural beauty with historical towns like Frías and Oña.
Yes, the park offers several difficult routes for experienced touring cyclists. For example, the Frías Medieval Bridge – Hanging Houses of Frías loop from Frías is a challenging 43.6 km route with over 1000 meters of elevation gain, providing a demanding yet rewarding experience.
Yes, the Montes Obarenes-San Zadornil Natural Park has visitor centers, known as "Casas del Parque," located in Oña and San Zadornil. These centers provide valuable information about the area's environmental points of interest and available routes, which can be helpful for planning your cycling excursions.
The natural park is home to a rich diversity of fauna. While cycling, you might spot various birds such as royal eagles, griffon vultures, and common buzzards. Mammals like roe deer and wild boars are also present, adding to the immersive natural experience.


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