How far is West Yellowstone Montana to Grand Teton National Park in Wyoming?

West Yellowstone, Montana, and Grand Teton National Park are located in different states. West Yellowstone is close to the western border of Montana, while Grand Teton National Park is in the western part of Wyoming. The shortest driving distance between the two places is about 150 miles (241 km) via US-191 S and US-26 E. The estimated driving time is about 3 hours and 30 minutes.