The Old Spanish Trail, supposedly the “longest, crookedest, mot arduous pack mule route in the history of America,” passed through this valley. Launched in the late 18th century, the trail was used by caravans from New Mexico carrying blankets to trade for horses and mules in California. In 1826, the fur trader and explorer Jedediah Smith led a band of trappers through the region. Seeking food, beaver hunting grounds, and more knowledge of the area's geography, the party continued west to California and made the first overland crossing of the continent from the American frontier. This valley and much of southern Utah were explored for settlement in 1849 by a company of 50 men led by the Mormon Apostle Parley P. Pratt. The party made systematic observation of land, mineral, and water resources. Following their recommendations, Mormon colonies were established in Juab, Pahvant, Utah, Sanpete, and Little Salt Lake Valleys.