What contributions did the mountain men explores and guides make to the settlement of the new frontier?

Mountain men, as explorers and guides, played a crucial role in the settlement of the American West by mapping uncharted territories and providing vital knowledge about the landscape, resources, and Native American tribes. Their skills in navigation and survival facilitated the movement of settlers, traders, and immigrants along key routes, such as the Oregon and California Trails. Additionally, they established trade networks and connections that laid the groundwork for economic development in the region. Overall, their contributions helped to open up the frontier for further exploration and settlement.