Applegate Lake is a 988-acre (400 ha) reservoir located in the Rogue River–Siskiyou National Forest about 27 miles (43 km) southwest of Medford in the U.S. state of Oregon.

It is 16 miles (26 km) south of Oregon Route 238 along Applegate River Road and slightly north of the Oregon–California border.

[7] As the reservoir filled with water, it inundated the remnants of Copper, a community that had once had a post office and a few buildings.

[4] Over 5,000 ounces of gold were recovered in the final two years of construction and proceeds were split between the federal government and two engineering firms involved.

[10] The United States Forest Service maintains campgrounds as well as places along the shore for fishing, picnicking, and swimming as well as boating.