S Saddlehorn, 40, _101_ campground, 86, 101 picnic area, 86, 101 views, 101, 102, _106_ Sagebrush, 120 Sahara, 29 Salt Wash Member, Morrison Formation, _47_, 90, 94, 107 uranium, 49 views, 41, _48_, 92, 95 water, 15 San Miguel River, ancestral, 72 San Rafael Swell, 36, 45, 128, 129 Sand dunes, 29, 36 Schist, 24 Seagoing reptiles, 56 Sentinal Spire, 30 Serpents Trail, 1, 2, _111_ views, 30, 49, 66, 113, _114_ Sharks, 56 Sheep, 99 Silica, 35 Size, Colorado National Monument, 5 Slick Rim, 42 Slick Rock, Colo., 40 Slick Rock Member, 38, 39, _40_, 42, 45 views, 31, 37, _41_, 42, _43_, 44 Snail shell, 53 South Broadway, 86, _89_-92, 118 South Camp Road, 86, _89_, 90, 108, 118 Squaw Fingers, 30 _Stegosaurus_, 50 view, 52 Stream cutting, 79 Summerville Formation, 39, _45_, 47 road cuts, 105, 108 views, 41, 42, _46_ Sunset Crater National Monument, 130 Synclines, 61