The Nansa River is one of the few remaining rivers in the region with a healthy population of Atlantic salmon.
The trail features a wooden walkway section suspended over the water, designed to minimize impact on the riverbank vegetation.
This route connects Muñorrodero to the Cueva del Soplao region conceptually, forming part of a larger network of walking paths in the Nansa Valley.
The path follows the path of an old fishermen's route historically used to access prime salmon fishing pools.
The river valley contains unique geological formations that contribute to the specific alkalinity of the water, supporting rich biodiversity.
The Senda Fluvial del Nansa, tramo 1º, is a 7.5-kilometer linear riverside trail that follows the lower course of the Nansa River in western Cantabria. This specific section starts in the village of Muñorrodero and concludes at the Pesquería bridge, winding through a sheltered riverine forest. The path is largely flat, utilizing boardwalks and dirt paths that hug the riverbank, providing a primary habitat for Atlantic salmon and European eel. It serves as a vital ecological corridor linking the limestone mountains of the Picos de Europa to the Cantabrian Sea. The area is characterized by dense riparian vegetation including alders, ashes, and willows that create a natural canopy over the water. Throughout the route, travelers will encounter remnants of historical industrial architecture related to river use. The trail is part of a larger network designed to balance environmental conservation with outdoor recreation.
The elevated wooden boardwalk section that allows a direct view over the river pools.
Bring polarized sunglasses to better see the trout and salmon swimming in the clear river water.
Check the weather forecast for heavy rain, as the river-level trail can become muddy or inaccessible during floods.
Carry insect repellent, as the humid, shaded riverbank environment attracts mosquitoes and flies.
Do not attempt to traverse the path immediately after heavy rainfall, as the low-lying sections near the riverbank are prone to flooding.
Maintain silence to avoid disturbing local wildlife; dogs should be kept on a leash to protect riverbank nesting birds.
