California /

Castaic Lagoon

Reservoir in California · 171 acres · near Castaic

Castaic Lagoon has 1 boat ramp listed as public.

Quagga mussels

Quagga mussels (latest report 2025) reported in this water (USGS Nonindigenous Aquatic Species database). Clean, drain and dry your boat, trailer and gear before you leave, and do not move water, plants or live bait to another water.

USGS Nonindigenous Aquatic Species database · checked October 18, 2026

Past algal blooms

Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2019 and 2026.

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

Launches