Wasatch Range (wôˈsăch) [key], part of the Rocky Mts., extending c.250 mi (400 km) south from SE Idaho to central Utah. Mt. Timpanogos, the highest peak (12,008 ft/3,660 m), is the site of Timpanogos Cave National Monument. Many streams on the western flank of the Wasatch carry water into the fertile Salt Lake oasis, which stretches along the foothills; Utah's principal cities and most of the state's population are found there. Emigrant Canyon, a site of early Mormon activities, is a major winter resort area. Skiing has become an important industry there.