(unnamed)

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(unnamed) flows into Río Oca , which it joins at N 42° 44′ 11″, W 3° 24′ 43″ at OSM node n10211810763, and there 1,343 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• arroyo de Penches, which joins it at N 42° 44′ 10″, W 3° 24′ 41″ at OSM node n10211810766, and 23 km of total upstream flows in.
load it's tributaries