Rodeo Beach, Public beach in Marin County, California.

Rodeo Beach is a broad shore of coarse, multi-colored pebbles, tan, brown, gray and reddish, at the mouth of Rodeo Lagoon in the Golden Gate National Recreation Area. A spit about 50 meters wide separates the lagoon from the ocean; for much of the year the lagoon is cut off, making the spit a baymouth bar. Part of the beach lies sheltered by cliffs.

Fort Cronkhite, located near the beach, was built during World War II as a military installation to protect San Francisco Bay. The historic buildings from that era remain standing today as reminders of that period.

The beach's name comes from Rodeo Lagoon, the embayment it separates from the ocean; for much of the year the lagoon is cut off, making the spit a baymouth bar. Visitors comb the shore for semi-precious stones but are asked to look rather than collect.

The beach is easiest to reach from the Alexander Avenue exit and Baker Barry Tunnel, where parking areas are available. Visitors should expect uneven ground and wear appropriate footwear for walking on pebbles.

For much of the year Rodeo Lagoon is cut off from the ocean, so the 50-metre-wide spit of beach acts as a baymouth bar. The beach is largely made of coarse chert grains, both red and green, a composition found on no other California beach.