(unnamed)

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(unnamed) flows into Río Pisuerga , which it joins at N 42° 43′ 15″, W 4° 17′ 5″ at OSM node n3059418908, and there 364 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• Arroyo Udrias, which joins it at N 42° 43′ 12″, W 4° 17′ 31″ at OSM node n5453752356, and 4 km of total upstream flows in.
load it's tributaries