Driving Distances from Boise, ID to Yellowstone National Park

Distances from Boise to key Yellowstone entry points:

• West Yellowstone, MT: ~285 miles (459 km) via Idaho Falls and Pocatello.
• Mammoth Hot Springs, WY: ~345 miles (555 km), continuing deeper into the park.

Drive time is typically 4–6 hours without major delays. Conditions vary with traffic, weather, and stops.