Trojan Peak, Mountain summit in the John Muir Wilderness, Inyo County, California, USA.

Trojan Peak is a mountain summit in the Sierra Nevada range of California, reaching an elevation of 4,251 meters above sea level. The peak stands near Lake Helen of Troy and can be accessed through several hiking routes in the area.

Norman Clyde made the first ascent on June 26, 1926. Chester Versteeg of the Sierra Club proposed the name, which the United States Board on Geographic Names adopted in 1951. Versteeg, first chairman of the club's Committee on Geographic Names, named Trojan Peak and nearby Lake Helen of Troy for his alma mater, the University of Southern California.

The name comes from Lake Helen of Troy, the mountain lake northwest of the summit, which Chester Versteeg named after his alma mater, the University of Southern California. Versteeg, first chairman of the Sierra Club's Committee on Geographic Names, proposed the peak's name; the US Board on Geographic Names adopted it in 1951.

The standard approach follows George Creek from the east, with the upper basin usually holding snow into early summer; the Shepherd Pass Trail gives a longer western alternative. Runoff from the mountain drains east to Owens Valley via George Creek. Above Lake Helen of Troy the slope gains 435 meters in about half a mile, so parties often camp low and start early.

Chester Versteeg, who proposed the peak's name, also named Lake Helen of Troy below it for his alma mater, the University of Southern California. The lake sits about half a mile from the summit, and the mountain rises 435 meters above it. The name was adopted by the United States Board on Geographic Names in 1951.