(unnamed)

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(unnamed) flows into Río Lozoya o de la Angostura , which it joins at N 40° 49′ 46″, W 3° 55′ 22″ at OSM node n1177590566, and there 42 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• Arroyo Peña Mala, which joins it at N 40° 49′ 45″, W 3° 55′ 22″ at OSM node n3698957603, and 5 km of total upstream flows in.
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