The Canyons 
Pinnacles in Split Mountain Canyon. 
Photograph by E. O. Beaman, U. S. Colo. Riv. Exp. 
comes the beautiful little Echo Park, really only the head of 
Whirlpool. Its name is derived from a wonderful echo of ten 
words returned from the smooth wall seen in the cut on page 
203. It is only a mile long with walls of 600 feet. At its head 
enter the Yampa River and Canyon, which mark the foot of 
expansion of the walls, 9 miles long,—9 miles of rainbow, for the 
surrounding rocks and marls are of every hue. Whirlpool, 2400 
feet deep, is about 14 miles in length and contains a number of 
rapids, but the whirlpools depend on the stage of water. Then 
