The river and its tributaries provide the course for the ascent up the Rocky Mountains. In the canyon, I-70 enters the Beavertail Mountain Tunnel, the first of several tunnels built to route the freeway across the Rockies.
The river and its branches facilitate the ascent up the Rocky Mountains. In the canyon, I-70 enters the Beavertail Mountain Tunnel, which is one of several tunnels built to guide the freeway across the Rockies.