Best Swimming Lakes in Colorado

Colorado is home to some of the most beautiful swimming lakes in the American West. From alpine lakes above 10,000 feet with crystal-clear snowmelt waters to warm reservoir beaches perfect for families, the state offers swimming experiences for every preference.

The best time to swim in Colorado lakes is typically June through September, though high-altitude lakes may not warm up until July. Always check current conditions — even in summer, many Colorado lakes can be surprisingly cold.