The freeway goes through the forest and plains north of I-90 before winding along Bison Creek and later the Boulder River.
Mississippi River | River Thames | Amazon River | Columbia River | Hudson River | Colorado River | Potomac River | river | Ohio River | Missouri River | Delaware River | Murray River | River Tyne | Madeira River | Boulder, Colorado | Volga River | River Nene | River Clyde | River Trent | River Severn | Amur River | River Wear | Allegheny River | Red River | Dnieper River | Yarra River | Paraná River | River Tees | Fraser River | Yangtze River |
Common vegetation in Boulder River Wilderness includes old-growth Douglas fir, true fir, western hemlock, and western red cedar, as well as bigleaf maple, alder, willow, and devil's club.