Geyser Country information
With the densest collection of geothermal features in the park, Upper Geyser Basin contains 180 of the park's 250-odd geysers. The most famous is Old Faithful , which spews from 3700 to 8400 gallons of water 100ft to 180ft into the air every 1½ hours or so. For an easy walk, check out the predicted eruption times at the brand new visitor center and then follow the easy boardwalk trail around the Upper Geyser Loop. The park's most beautiful thermal feature is Grand Prismatic Spring in the Midway Geyser Basin. The Firehole and Madison Rivers offer superb fly-fishing and wildlife viewing.