Diamond Valley Lake

Reservoir in California · 4,343 acres · near Hemet

Diamond Valley Lake has 1 boat ramp listed as public.

Golden mussels

California Department of Fish and Wildlife has detected golden mussels (latest detection 2026) 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): 2018 and 2023 to 2026.

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

Launches

Diamond Valley Lake BLF · Boat ramp · near Hemet

Community

Where people who fish, boat and paddle Diamond Valley Lake talk about it. Lake associations, clubs and local groups will be added as we find them.

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Wikidata: Q3026102