California / O'Neill Forebay /

Medeiros Boat Ramp San Luis Reservoir, O'Neill Forebay

Boat ramp · on O'Neill Forebay · near Gustine · California

Golden mussels

California Department of Fish and Wildlife has detected golden mussels (latest detection 2025) in this water. Clean, drain and dry your boat, trailer and gear before you leave, and do not move water, plants or live bait to another water.

California Department of Fish and Wildlife · checked October 18, 2026

Past algal blooms

Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2016, 2019 to 2022 and 2025.

state reports compiled by U.S. EPA · checked October 18, 2026

Status not reported No closure has been posted for this launch, but its agency does not publish open or closed status. Check with the managing agency before you tow.

At the launch

Type
Boat ramp
Managed by
California State Parks
Website
parks.ca.gov
Coordinates
37.06873, -121.02355

Directions (Google) Apple Maps

Conditions

On O'Neill Forebay

Reservoir in California. All launches on O'Neill Forebay.

Community

Where people who use O'Neill Forebay talk about it.

Nearby launches

Sources

Why it is listed as public: listed by California Boating Facilities (Division of Boating and Waterways survey, CDFW Fishing Guide). Something wrong, or is this launch private? Send a correction; it goes to a person.