River Radamus (born February 12, 1998) is an American World Cup alpine ski racer from Colorado. He is a three-time Youth Olympic Games gold medalist and a two-time Junior World Champion. At the World Cup level, Radamus focuses on giant slalom, and also competes in super-G and slalom. He is the son of Aldo Radamus, former U.S. Ski Team coach and Team Summit Colorado Alpine Program Director.
Radamus represented the United States at the 2022 Winter Olympics, and just missed a medal, finishing fourth in the giant slalom. He made a second Olympic appearance at the 2026 Winter Olympics, where his best finish was seventeenth in the giant slalom and in the men's team combined he finished 19th with teammate Kyle Negomir.