The largest freshwater lake in the U.S. at an altitude above 7,000 ft/2,100 m, Yellowstone Lake is approximately 20 mi/32 km long and 14 mi/23 km wide. At several places around the lake, you can see wisps of steam curling up from the sand, another reminder of the volcanic activity percolating beneath the park. At West Thumb, there's a geyser basin with beautiful clear azure pools that overlook the lakeshore and small geyser cones that rise up in the lake itself.
