National Geographic : 1940 Jun
C National Geographic Society Kodachrome byEdwin 1.iser RIDING BACK FROM MYSTIC FALLS, THEY WADE A RIVER "THAT GETS HOT ON THE BOTTOM" Trapper Jim Bridger a century ago reported that a stream in the Yellowstone ran so fast that the friction heated itsstones! Intruth, the Firehole River is hot on the bottom in certain spots, but because of warm springs in its bed, not friction of running water. Mystic Falls, on the Little Firehole, is a favorite spot for riders from Old Faithful. The man in cowboy garb is the "dude wrangler," or horseman-guide.