Midway Geyser Basin

Midway Geyser Basin is much smaller than the other basins found alongside the Firehole River. Despite its small size, it contains two large features, the 200-by-300-foot (61 by 91 m) wide Excelsior Geyser which pours over 4,000 U.S. gallons (15,000 L; 3,300 imp gal) per minute into the Firehole River. The largest hot spring in Yellowstone, the 370-foot (110 m) wide and 121-foot (37 m) deep Grand Prismatic Spring is also found here.