Where the Little Crawling Stone River tears out of the Mission Mountains it has left a grayish-white gap that may be seen for many miles. This is the head of the North Crawling Stone Valley. Twenty miles to the right the big river itself bursts through the Mission hills in the canyon known as the Box. Between the confluence of Big and Little Crawling Stone, and on the east side of Little Crawling Stone, lies a vast waste. Standing in the midst of this frightful eruption from the heart of the mountains, one sees, as far as the eye can reach, a landscape utterly forbidding. North for sixty miles lie the high chains of the Mission range, and a cuplike configuration of the mountains close to the valley affords a resting-place for the deepest snows of winter and a precipitous escape for the torrents of June. Here, when the sun reaches its summer height or a sweet-grass wind blows soft or a cloudburst above the peaks strikes the southerly face of the range, winter unfrocks in a single night. A glacier of snow melts within twenty-four hours into a torrent of lava and bursts with incredible fury from a thousand gorges.
When this happens nothing withstands. Whatever lies in the path of the flood is swept from the face of the earth. The mountains, assailed in a moment with the ferocity of a hundred storms, are ripped and torn like hills of clay. The frosted scale of the granite, the desperate root of the cedar, the poised nest of the eagle, the clutch of the crannied vine, the split and start of the mountainside, are all as one before the June thaw. At its height Little Crawling Stone, with a head of forty feet, is a choking flood of rock. Mountains, torn and bleeding, vomit bowlders of thirty, sixty, a hundred tons like pebbles upon the valley. Even there they find no permanent resting-place. Each succeeding year sees them torn groaning from their beds in the wash. New masses of rock are hurled upon them, new waters lift them in fresh caprice, and the crash and the grinding echo in the hills like a roar of mountain thunder.