4.4
(229)
1,842
hikers
14
hikes
Hiking around National Park los Collados del Asón offers a diverse landscape characterized by mountainous terrain, deep river valleys, and dense forests. The region is known for its limestone formations and the source of the Asón River, featuring notable waterfalls. These natural features provide varied environments for exploring the many hiking trails in National Park los Collados del Asón.
Last updated: May 5, 2026
4.0
(1)
32
hikers
9.54km
04:26
640m
640m
Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
2
hikers
11.8km
04:36
520m
520m
Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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4.9
(27)
262
hikers
7.67km
02:21
270m
270m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.5
(2)
33
hikers
10.7km
04:40
650m
650m
Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
4.3
(3)
14
hikers
6.44km
02:26
330m
330m
Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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The panoramic views from the top are spectacular
2
0
Castro Valnera is a beautiful, formidable mountain with its 1,718 meters. It is the highest in the eastern sector of the Cantabrian mountain range.
10
1
A small mountain pass in the easternmost sector of the Cordillera. At 1,316 meters above sea level, it is the third highest mountain pass in Cantabria. The port is closed very frequently in winter, especially in its Cantabrian part, being closed permanently for several months on many occasions.
2
0
Both the waterfall and the environment that surrounds it are simply wonderful. Easily accessible, this waterfall is a waterfall of about 70 meters with a natural pool at its feet. A true paradise that deserves to be visited at any time of the year, although it is recommended in spring-summer.
1
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The Peña Lusa with its summit at 1574 masl is one of the highest peaks of the mountain range known as Las Machorras that separates the Lunada glacial cirque in Burgos, from the deep valley of Asón in the Cantabrian interior.
2
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One of the first peaks with beautiful views if you are doing the Lunada to Castro Valnera trail. Here you will have the first panoramic views, go carefully and firmly because the path is narrow.
2
0
It is difficult to get to the same waterfall. And many times it carries very little water, like the day I was there.
1
0
An unrepeatable experience, with wonderful views, especially to the Cantabrian area that can be seen on a clear day to the sea. Very dangerous with fog, which can go down at any time. And it is also not very advisable to climb it on wet ground or with snow / ice unless you are very expert because a slip is deadly.
7
1
National Park los Collados del Asón offers a diverse network of over a dozen marked hiking trails. These routes vary in difficulty, ranging from easy family-friendly walks to more challenging ascents, ensuring options for all experience levels.
Yes, the park features options suitable for families and those seeking easier walks. While most trails are moderate to difficult, there is at least one easy route available. A good option for a scenic, moderate walk that many families enjoy is the Asón Waterfall loop from Asón, which is about 4.8 miles (7.7 km) long and takes around 2 hours 20 minutes.
The region is rich in natural beauty. Hikers can explore the impressive Asón Waterfall, which is the source of the Asón River. Other highlights include the scenic La Sía Pass, the dramatic Canal Honda gorge, and viewpoints like Alto de la Posadía, offering expansive views of the mountainous landscape.
Yes, several circular routes allow you to start and end at the same point. A popular choice is the Asón Waterfall loop from Asón. For a more challenging circular option, consider the Portillo Lunada – Castro Valnera Summit loop from Portillo de Lunada, which is a difficult 10.7 km trail.
The best time to hike is generally from late spring to early autumn (May to October) when the weather is milder and trails are most accessible. During these months, you'll experience lush landscapes and comfortable temperatures. Autumn also offers beautiful fall foliage, while spring brings blooming wildflowers.
In autumn, the weather can be unpredictable. It's advisable to wear layers, including a waterproof and windproof outer shell, as rain and strong winds are possible. Sturdy hiking boots with good ankle support are essential for the varied terrain. A hat, gloves, and warm base layers are also recommended, especially at higher elevations.
Generally, dogs are permitted on trails within the National Park, but they must be kept on a leash to protect local wildlife and ensure the safety of other hikers. Always check specific trail regulations or local signage, as some protected areas might have stricter rules.
Parking is typically available near the main trailheads and villages that serve as starting points for hikes. However, spaces can be limited, especially during peak season. It's recommended to arrive early, particularly for popular routes, or consider carpooling.
The area is highly rated by the komoot community, with an average score of 4.4 stars from over 180 reviews. Hikers frequently praise the park's diverse landscape, including its mountainous peaks, deep river valleys, and the stunning Asón Waterfall. The challenging ascents and expansive mountain views are also often highlighted.
National Park los Collados del Asón is home to a variety of wildlife. Keep an eye out for chamois and deer in the higher altitudes, and various bird species, including raptors, throughout the park. Patience and quiet observation, especially during dawn or dusk, increase your chances of spotting animals.
Public transport options to reach the more remote trailheads within National Park los Collados del Asón are limited. While some villages might have bus connections, direct access to many starting points often requires a private vehicle. It's advisable to check local bus schedules in advance if you plan to rely on public transport.
Yes, the park is known for its mountainous terrain and offers several difficult high-altitude hikes. For instance, the Portillo Lunada path to Castro Valnera is a difficult 9.5 km trail ascending to Castro Valnera, providing expansive mountain views. Another challenging option is Peña Lusa from Portillo de la Sía, navigating high mountain passes.


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