Cedar Lake, artificial lake in the San Bernardino Mountains, San Bernardino County, California

Cedar Lake is an artificial lake in the San Bernardino Mountains, formed by a dam across a minor tributary of Metcalf Creek. The lake is the centerpiece of Cedar Lake Camp, a private retreat center on 270 acres. Cedar Lake Dam, a variable-radius arch dam, stands 28 feet high and 220 feet long, with its crest at 7,101 feet above sea level.

The Talmadge brothers bought the land in 1913 for cattle grazing and sold it in 1922 to the Bartlett brothers, who built the dam in 1928. Guy Bartlett, a family member, took over in 1937 and charged visitors 25 cents. The First Congregational Church of Los Angeles bought 110 acres in January 1955 and later expanded to 270 acres.

Cedar Lake Camp is a private retreat center owned and operated by Cedar Lake Camp, Inc., a nonprofit public benefit corporation. The lake and camp are not open to the general public; they host organized groups on the 270 acres the First Congregational Church of Los Angeles assembled after buying 110 acres in January 1955.

The lake is accessible by winding mountain roads about two hours from Los Angeles or San Diego. Bring warm clothing as nights get cold, with temperatures dropping into the 30s and 40s Fahrenheit (0-10 Celsius), especially in fall and spring.

The old mill house and its water wheel appear in the Bonanza episode "Thornton's Account", filmed at the lake. More than forty films used the lake, among them High Sierra (1941) and The Parent Trap (1961), plus at least eight episodes of Bonanza.