Lake Hemet, Water reservoir in San Jacinto Mountains, California.

Lake Hemet is an artificial reservoir in the San Jacinto Mountains at 4,340 feet (1,323 m) above sea level, within the San Bernardino National Forest. It covers 470 acres (190 ha) with 12 miles (19 km) of shoreline, and its dark blue water meets a sandy shore below a hillside of scattered trees and dry grass. The reservoir holds 14,000 acre-feet (17,000,000 m3) behind Hemet Dam.

The dam was built in 1895 and initially held the record as the world's largest solid masonry dam until 1911. This early engineering achievement shaped water management in the region.

The reservoir appeared in the CBS television series Airwolf during the 1980s, featuring scenes of a character residing in a lakeside cabin.

Year-round camping facilities, fishing spots, and boat rentals are available for visitors to enjoy. The setup makes it easy for water sports enthusiasts and outdoor lovers to spend time here.

When completed in 1895, the Hemet Dam stood 122.5 feet high and was the tallest solid masonry dam in the world, holding that title until Roosevelt Dam was finished in Arizona in 1911. The dam was raised to 135 feet in 1923.