O'Neill Forebay

About O'Neill Forebay

O'Neill Dam and Forebay are joint Federal-State facilities located on San Luis Creek 2.5 miles downstream from San Luis Dam. O'Neill Forebay Dam is a feature of the Central Valley Project - San Joaquin Division - San Luis Unit. The reservoir has a surface area of 2,250 acres and 14 miles of shoreline. The Park includes boating, camping, picnic facilities, fishing, hiking, and serves as a major family destination for many in the west central valley. Currently an expansion of the Maderos boat ramp facilities is underway, which will improve boat access and day use facilities.

How to Get There

The site is located about 10 miles west of Los Banos, California on CA Highway 152.

Plan Your Visit to O'Neill Forebay

Heading to O'Neill Forebay? A few things to know before you go:

• Reservations: popular sites fill up fast — check Recreation.gov 6 months in advance
• Fees: day-use and camping fees vary; check current rates on the official park page
• Trash & pack-out: follow Leave No Trace principles
• Wildlife: store food in bear boxes where provided; never feed wildlife
• Weather: the 5-day forecast above is updated every 6 hours; verify just before you go

References & Official Resources

• Official Recreation.gov page
• View on OpenStreetMap
• Driving directions (Google Maps)