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Routes
Mountain biking trails
Spain
Santander
Cantabria
Costera
Arnuero

San Martín Fort – Santoña Marshes loop from Isla

Routes
Mountain biking trails
Spain
Santander
Cantabria
Costera
Arnuero

San Martín Fort – Santoña Marshes loop from Isla

Moderate

7

riders

San Martín Fort – Santoña Marshes loop from Isla

03:42

61.3km

450m

Mountain biking

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: May 29, 2026

Tips

Cycling is not permitted along parts of this route

After 35.6 km for 58 m

After 40.8 km for 210 m

Waypoints

A

Start point

Parking

Get Directions

1

7.07 km

Eucalyptus Trail

Highlight • Trail

It is like entering a cave of vegetation, breathing Eucalyptus

Translated by Google •

Tip by

2

15.6 km

Marisma de Solija

Highlight • Natural

The Solija marsh is located within the Natural Park and is a protected area with a flora and fauna reserve. There are several paths to go through them and some bird watching booths for those who enjoy this activity.

Translated by Google •

Tip by

3

18.3 km

San Martín Fort

Highlight • Historical Site

Stunning views of Laredo, and a very interesting construction.

Translated by Google •

Tip by

4

22.7 km

Santoña Marshes

Highlight • Natural

This natural park is the most important wetland on the Cantabrian coast. Its 6,679 hectares are full of unique marine fauna and are home to more than 121 species of …

Translated by Google •

Tip by

5

41.7 km

Monastery of San Sebastián de Montehano

Highlight • Religious Site

Belonging to the Order of the Capuchin Fathers, this beautiful monastery was founded by the Franciscans at the beginning of the 14th century. Later it was enlarged until it was …

Translated by Google •

Tip by

6

45.9 km

Church of Our Lady of the Virgin of Puerto

Highlight • Religious Site

Small hermitage in the eastern part of the town.

Translated by Google •

Tip by

B

61.3 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

19.9 km

19.2 km

12.2 km

5.54 km

2.93 km

1.54 km

121 m

Surfaces

33.5 km

18.7 km

6.06 km

1.54 km

856 m

703 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (90 m)

Lowest point (0 m)

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Weather

Powered by Foreca

Today

Thursday 2 July

23°C

17°C

15 %

Additional weather tips

Max wind speed: 16.0 km/h

to get more detailed weather forecasts along your route

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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