Before Mormon settlement, the Shoshone, Ute, and Paiute had dwelt in the Salt Lake Valley for thousands of years. However, occupation was seasonal, near streams emptying from Canyons into the Salt Lake Valley. The first US explorer in the Salt Lake area is believed to be Jim Bridger in 1825, although others had been in Utah earlier, some as far north as the nearby Utah Valley (the Dominguez-Escalante expedition of 1776 were undoubtedly cognizant of the Salt Lake valley). U.S. Army officer John C. Frémont surveyed the Great Salt Lake and the Salt Lake Valley in 1843 and 1845. The Donner party, a group of ill-fated pioneers, had traveled through the Great Salt Lake Valley in August 1846.