California / San Joaquin River /

Mossdale Crossing Regional Park Boat Launch Facility

Boat ramp · on San Joaquin River · near Lathrop · California

Golden mussels

California Department of Fish and Wildlife has detected golden mussels (latest detection 2026) in San Joaquin River 4.0 km from this launch. 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

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
Restrooms
Yes
Managed by
County
Website
sjparks.com
Coordinates
37.78698, -121.30714

Directions (Google) Apple Maps

Conditions

Water level

Latest reading loads here; without it, see the USGS page below.

USGS gauge SAN JOAQUIN R NR VERNALIS CA, 8.0 mi from this launch on San Joaquin River: water level, flow, water temperature, a reading every 15 minutes. Readings and history at USGS.

On San Joaquin River

River in California. All launches on San Joaquin River.

Community

Where people who use San Joaquin River 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.