The fur trade was the primary reason why Mountain men went west. The demand for beaver pelts was high in the early 19th century, and beaver were plentiful in the Rocky Mountains. Mountain men trapped beaver and other animals, and then sold the pelts to fur companies.
Exploring and mapping the West
Mountain men were also instrumental in exploring and mapping the American West. They travelled through uncharted territory, and their reports and maps helped to create a better understanding of the region.
Hunting and fishing
Mountain men were skilled hunters and fishermen, and they often sold their meat and fish to other settlers and travellers.
Prospecting for gold and other minerals
Some Mountain men also prospected for gold and other minerals. Although few struck it rich, the California Gold Rush of 1849 lured many Mountain men west.