Scenic Drive: West Yellowstone to Midway, Utah Guide

Departing West Yellowstone, Montana, at the west entrance of Yellowstone National Park, you'll follow US-191 south into Idaho, then I-15 and US-189 into Utah, ending in Midway at 5,560 feet elevation. This 337-mile route traverses three states and two major mountain ranges, the Rockies and the Wasatch, in about 5.5 hours of pure driving time.

Since 1872, Yellowstone has been the world's first national park, but this route also passes near the site of the 1959 Hebgen Lake earthquake, which formed Quake Lake and altered the Madison River's course. You'll cross the Continental Divide twice, once at Targhee Pass (7,072 ft) and again near Monida Pass (6,923 ft), which geologically separates the Missouri and Colorado River watersheds.

The drive traces the Madison River, famous for fly fishing, and skirts the Caribou-Targhee National Forest, where dense pine forest dominates until the landscape opens into sagebrush plains near St. Anthony. Just east of the route, Grand Teton National Park offers a detour through Jackson Hole, but the main road passes the 200,000-acre Craters of the Moon National Monument and Preserve, a volcanic field with lava tubes and cinder cones, about 20 miles off I-15 near Arco.

In Idaho Falls, the Museum of Idaho (admission $10) features rotating natural history exhibits, while the Idaho Falls River Walk offers a scenic path along the Snake River. Farther south, the town of Montpelier preserves a historic 1909 railroad depot, a nod to the region's rail heritage. For local flavor, stop at the Ashton's historic gas station, now a small diner serving huckleberry milkshakes (around $6).

The route crosses no UNESCO World Heritage Sites—Yellowstone is one, but it's your starting point, not an en route stop. For a meal, Bittercreek Ale House in Idaho Falls (208-522-3533) offers a farm-to-table menu, while Midway's culinary scene features Swiss-German influences, such as the Midway Mercantile and its bratwurst. For groceries, Broulim's in Idaho Falls and Ream's in Springville provide supplies, but small towns like St. Anthony have limited options.

The route's primary artery is US-191, a two-lane highway for the first 150 miles until it joins I-15 at Idaho Falls. From there, I-15 offers a modern four-lane interstate through Pocatello and into Utah, before switching to US-189 at Provo for the final 30 miles into Midway. Fuel stations cluster at West Yellowstone, Ashton, St. Anthony, Idaho Falls, Pocatello, and Provo, with gaps of up to 60 miles between them on US-191, so fill up before leaving Yellowstone.

As of 2024, Idaho's gas tax is $0.33 per gallon and Utah's $0.30, contributing to average prices of $3.50 and $3.65 respectively. Budget around $50 for fuel for a standard sedan. For EV drivers, fast chargers are available in Idaho Falls and Provo, but the first 150 miles lack public charging, making a full battery essential.

Road quality on US-191 is generally good, with occasional potholes in spring. I-15 maintains smooth asphalt, but construction zones near Pocatello and Spanish Fork can cause delays. Winter travel requires tire chains or 4WD from November to April, as passes near Island Park and Montpelier see regular snowfall. Cell service is spotty on US-191 between West Yellowstone and Ashton, but becomes reliable from Idaho Falls onward.

US-191 between West Yellowstone and Ashton is a favorite for bison and elk crossings, especially at dawn and dusk, so scan the shoulders and heed wildlife warning signs. Speed limits are 65 mph on US-191 and 80 mph on I-15, but always adjust for weather. The route is family-friendly: Yellowstone's Grizzly & Wolf Discovery Center in West Yellowstone (tickets $15.75 for adults, $10.75 for kids) is an engaging start, while the Idaho Falls Zoo offers an affordable afternoon. For kids needing to burn energy, the Playground in the Park in Pocatello is the largest all-accessible playground in the region.

Furry companions are welcome at most rest stops, but national park facilities and some restaurants have constraints. Off-leash parks exist in Idaho Falls (Tautphaus Park) and Provo (Provo Dog Pond). For overnight stays, allow pets at Mom's West Yellowstone (pet fee $25) and La Quinta in Idaho Falls (no fee). Hydrate regularly—high altitudes and dry air can cause fatigue; take breaks every two hours, and consider stopping at rest areas near St. Anthony and McCammon.

For hidden gems, pull off at Mesa Falls Scenic Byway just north of Ashton—it's 10 miles detour to see Lower Mesa Falls (85 feet) and Upper Mesa Falls (114 feet), less crowded than Yellowstone's waterfalls. Or, near Montpelier, visit the Paris Ice Cave, a lava tube with year-round ice formations, a 15-minute hike from a local farm road. For safer driving, save these for the return trip if short on time; overall, is it worth driving this route? Absolutely—it's the most efficient way to connect two iconic mountain regions, with enough variety to make the journey itself a highlight. For more tips, see how to find the best stops and hidden gems between cities.