(unnamed)

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(unnamed) flows into Río Nalón , which it joins at N 43° 14′ 21″, W 5° 33′ 50″ at OSM node n10118483703, and there 280 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• Arroyo Merujalín, which joins it at N 43° 14′ 20″, W 5° 33′ 53″ at OSM node n10118493156, and 2 km of total upstream flows in.
load it's tributaries