MOUNT ST. HELENS FROM THE TIMBER-LINE TRAIL ON MOUNT RAINIER 234 _From a photograph by A. H. Barnes_ RAINBOW NATURAL BRIDGE, RAINBOW NATIONAL MONUMENT 238 _From a photograph by the Geological Survey_ ILLECILLEWAET VALLEY, WITH MOUNT SIR DONALD IN THE DISTANCE, GLACIER PARK, CANADA 252 _From a photograph taken for the Commissioner of Dominion Parks_ TETON MOUNTAIN REGION: PROPOSED ADDITION TO YELLOWSTONE PARK 266 _From a photograph by J. E. Stimson_ MOUNT BAKER FROM THE WEST 270 _From a copyright photograph by W. H. Wilcox, Port Townsend, Wash._ MOUNT ST ELIAS FROM EAST SIDE OF AGASSIZ GLACIER, ALASKA 274 _From a photograph by J. C. Russell_ ON THE ROAD TO SHERMAN TREE, GIANT FOREST, SEQUOIA NATIONAL PARK 282 _From a photograph by George F. Belden_ ELK IN JACKSON HOLE 296 _From a photograph by S. N. Leek_ BLACK BEAR CUBS, SEQUOIA NATIONAL PARK 304 _From a photograph by Lindley Eddy_ LONG'S PEAK, FROM CHASM LAKE, ROCKY MOUNTAIN NATIONAL PARK 320 _From a photograph by Enos A. Mills_ ABOVE THE TIMBER-LINE IN THE ROCKY MOUNTAIN NATIONAL PARK, SHOWING LONG'S PEAK 346 _From a photograph by H. T. Cowling_ JOHN MUIR IN MUIR WOODS 360 _From a photograph by Herbert W. Gleason_ TRAIL NEAR TIMBER-LINE, INDIAN HENRY'S PARK, MOUNT RAINIER 388 _From a photograph by Curtis & Miller_ MAP OF YELLOWSTONE NATIONAL PARK 436 MAP OF YOSEMITE NATIONAL PARK 446 MAP OF GLACIER NATIONAL PARK 476 MAP OF ROCKY MOUNTAIN NATIONAL PARK 492 _The maps and bird's-eye view are used by permission of the National Park Service, Department of the Interior._ [Illustration: MAP SHOWING LOCATION OF NATIONAL PARKS AND NATIONAL MONUMENTS, 1917 _By permission of the National Park Service, Department of the Interior_] YOUR NATIONAL PARKS YOUR NATIONAL PARKS I THE YELLOWSTONE NATIONAL PARK 1. A CAMP-FIRE THAT MADE HISTORY On September 19, 1870, a number of men were chatting around a camp-fire in the wilds of northwestern Wyoming. They had been exploring the Yellowstone wonderland. They had seen the geysers,--little hot-water volcanoes,--the pools of boiling colored mud, the great petrified forest, and the golden cañon of the Yellowstone, into whose colored depths the snowy river leaps. The exploration was over, and the men were about to start for their homes.