Arroyo Las Positas is a 7.4-mile-long (11.9 km) westward-flowing watercourse in Alameda County, California, which begins at the confluence of Arroyo Seco and Cayetano Creek north of Livermore, and empties into Arroyo Mocho in Dublin, California.
See also
- List of watercourses in the San Francisco Bay Area
References

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