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Spain
Santander
Cantabria
Ason

National Park los Collados del Asón

Routes
Hikes
Spain
Santander
Cantabria
Ason

National Park los Collados del Asón

The best walks and hikes around National Park los Collados del Asón

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.

Best hiking trails around National Park los Collados del Asón

  • The most popular hiking route is Portillo Lunada path to Castro Valnera, a 5.9 miles (9.5 km) trail that takes 4 hours 25 minutes to complete. This difficult route ascends to Castro Valnera, offering expansive mountain views.
  • Another top favourite among local hikers is Peña Lusa from Portillo de la Sía, a difficult 7.3 miles (11.8 km) path. This trail navigates high mountain passes and open landscapes.
  • Local hikers also love the Asón Waterfall loop from Asón, a 4.8 miles (7.7 km) trail leading through river valleys and forested areas, often completed in about 2 hours 20 minutes.
  • Hiking around National Park los Collados del Asón is defined by mountainous peaks, river gorges, and lush woodlands. The network of routes offers options for easy family friendly walks as well as more challenging ascents.
  • The routes in National Park los Collados del Asón are highly rated by the komoot community with an average score of 4.4 stars from over 180 reviews. More than 1,400 hikers have used komoot to explore National Park los Collados del Asón's varied terrain.

Last updated: May 5, 2026

4.0

(1)

32

hikers

#1.

Portillo Lunada path to Castro Valnera

9.54km

04:26

640m

640m

Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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Hard

2

hikers

Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard
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4.9

(27)

262

hikers

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate

Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard

Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard
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Popular around National Park los Collados del Asón

Road Cycling Routes around National Park los Collados del Asón

Running Trails around National Park los Collados del Asón

Cycling around National Park los Collados del Asón

MTB Trails around National Park los Collados del Asón

Tips from the Community

Oscar García
August 22, 2023, Castro Valnera Summit

The panoramic views from the top are spectacular

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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.

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10

1

LaraFY
January 5, 2023, Portillo Lunada

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.

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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.

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1

0

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.

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2

0

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.

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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.

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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.

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7

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Frequently Asked Questions

How many hiking trails are available in National Park los Collados del Asón?

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.

Are there easy or family-friendly hiking options in National Park los Collados del Asón?

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.

What are some notable natural attractions to see along the trails?

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.

Are there any circular hiking routes in the park?

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.

What is the best time of year to hike in National Park los Collados del Asón?

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.

What should I wear for hiking in National Park los Collados del Asón, especially in autumn?

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.

Are dogs allowed on the hiking trails in National Park los Collados del Asón?

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.

Is there parking available at the trailheads?

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.

What do other hikers enjoy most about National Park los Collados del Asón?

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.

Are there any opportunities for wildlife spotting?

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.

Can I reach the hiking routes using public transport?

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.

Are there any challenging high-altitude hikes?

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.

Most popular routes around National Park los Collados del Asón

Road Cycling Routes around National Park los Collados del Asón

Most popular attractions around National Park los Collados del Asón

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