Road Trip Guide: Boise, ID to Gardiner, MT

This 500-mile journey from Boise, ID to Gardiner, MT traverses the heart of the Rocky Mountains, following US-20, US-26, and I-15. It's a path that crosses the Continental Divide twice, passing through historic railroad towns and volcanic landscapes.

The route passes within 50 miles of Craters of the Moon National Monument, a surreal lava field formed by eruptions 15,000 years ago. This is not just a drive; it's a geological timeline.

For a deeper dive into discovering offbeat attractions, see how to find the best stops and hidden gems between cities.

Route Overview

Best stops Boise, ID to Gardiner, MT include Idaho Falls, West Yellowstone, and smaller towns like Arco. How long to drive Boise, ID to Gardiner, MT? Plan for 7-9 hours of driving time, not including stops.

Is it worth driving Boise, ID to Gardiner, MT? Absolutely, for the dramatic transition from high desert to alpine forests. Things to do between Boise, ID and Gardiner, MT include exploring Craters of the Moon and Mesa Falls Scenic Byway.

Fuel and Route Economics

• Fuel stops every 50-70 miles along US-20 in Idaho; stations are less frequent in Montana sections.
• Gas prices tend to be higher in tourist areas like West Yellowstone; fill up in Idaho Falls or Rexburg.
• Total fuel cost for a standard SUV: approximately $60-80, depending on current rates.
• Rest areas: Rest stops at Mountain Home, Craters of the Moon, and near St. Anthony are well-maintained with restrooms.

Climatic Conditions & Route Aesthetics

• Summer: 80-90°F in Boise, dropping to 70°F in Yellowstone; afternoon thunderstorms common.
• Winter: Sub-zero possible; snow can close US-191; check road reports.
• Spring/Fall: Unpredictable; carry layers for sudden temperature swings.

UNESCO World Heritage Sites: Yellowstone National Park, a UNESCO site since 1978. While the park is the main draw, the drive itself offers lesser-known marvels.

Natural Landscapes & Attractions: Craters of the Moon has cinder cones and lava tubes. Mesa Falls is a short detour on US-20. The Teton Range is visible from ID-33/31 near Victor.

Hidden Off-Route Spots

• Egin Lakes (ID-28): Hot springs and sand dunes, 30 min north of US-20.
• Upper Mesa Falls: a 114-foot waterfall on the Henrys Fork of the Snake River, just off US-20 near Ashton.

Culinary Infrastructure

• Idaho Falls: The Snake Bite for hand-rolled sushi; Great Harvest Bread Co. for fresh bread.
• West Yellowstone: The Buffalo Bar & Grill for bison burgers; Wild West Pizzeria for wood-fired pizza.
• Gardiner: The Corral Drive-In for classic American fare; Yellowstone Mountain Baking Co. for pies.

Local Commerce & Culture

• Idaho Falls: Visit the historic Colonial Theater and the Idaho Falls Arts Council galleries.
• West Yellowstone: Small shops selling Native American crafts and outdoor gear; stop at the Yellowstone Historic Center.
• Gardiner: The Roosevelt Arch is downtown; browse art galleries featuring local wildlife photography.

Infrastructure Safety & Road Quality: US-20 and I-15 are well-maintained; US-191 from West Yellowstone to Gardiner is two-lane, winding, and often narrow. Watch for wildlife at dawn/dusk.

Fatigue Management & Rest Zones: Stop every 2 hours at designated rest areas. The rest area at mile 170 on US-20 (near Arco) has picnic tables and clean restrooms.

Family and Child Suitability

• Craters of the Moon offers a junior ranger program and easy boardwalk trails.
• Mesa Falls Visitor Center has a nature trail with interpretive signs.
• West Yellowstone has a Bear World drive-through zoo and a playground at the city park.

Pet-Friendly Framework

• Pets allowed on leash at Craters of the Moon (not on all trails).
• Many hotels in Idaho Falls and West Yellowstone charge $20-50 pet fees.
• Dogs allowed in Yellowstone but must be leashed and not on most trails or boardwalks.
• Gardiner has pet-friendly motels like the Yellowstone Basin Inn with no weight limit.