It is located just to the east of Mount McLoughlin, which stands 9,495 feet (2,894 m) above sea level.

In 1898, the Fish Lake Water Company was established to help irrigate the Rogue Valley.

[4] The Bushy-tailed Woodrat and Golden-mantled Ground Squirrel, species of least concern, can be found around the lake.

[7] The Pacific Crest Trail passes by about 2 miles (3.2 km) from Fourmile Lake.

[8][11] Popular activities include fishing, swimming, and boating.