O'Neill Forebay
Reservoir in California · 2,100 acres · near Gustine
O'Neill Forebay has 2 boat ramps listed as public.
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
Launches
- Medeiros Boat Ramp San Luis Reservoir, O'Neill Forebay · Boat ramp · near Gustine
- San Luis Reservoir (O'Neill Forebay Boat Launch Facility) · Boat ramp · near Gustine
Community
Where people who fish, boat and paddle O'Neill Forebay talk about it. Lake associations, clubs and local groups will be added as we find them.
Wikidata: Q7071912