McCall to Pinedale Road Trip: Scenic Drive Guide

This 350-mile route from McCall, Idaho, to Pinedale, Wyoming, traces the southern flank of the Salmon River Mountains, crossing the Snake River Plain before climbing into the Wyoming Range. A little-known fact: the highway crosses the Continental Divide twice—once near Monida Pass and again near South Pass—making it a genuine two-ocean journey.

Most travelers underestimate the drive time; the official route (US-95, I-84, US-20, US-26, and US-189) takes approximately 6.5 hours without stops, but the ever-changing landscapes and roadside attractions can easily turn it into a full-day adventure. For tips on uncovering hidden gems en route, see how to find the best stops and hidden gems between cities.

Below is a quick logistics overview to help you plan.

The route crosses three distinct eco-regions: the Payette River corridor’s ponderosa pine forests, the Snake River Plain’s sagebrush steppe, and the Wyoming Range’s alpine meadows. The most striking natural landmark is Craters of the Moon National Monument & Preserve (near Arco, ID), a surreal volcanic landscape of lava tubes and cinder cones—a must-stop for geology enthusiasts.

• Natural Landscapes & Attractions: Craters of the Moon (80,000 acres of lava fields), Bear World (drive-through wildlife park near Rexburg), and the Palisades Reservoir (turquoise waters, hiking trails).
• Local Commerce: In Pinedale, the Museum of the Mountain Man details the fur trade era; the Green River Rendezvous reenactment happens every July.

For those interested in UNESCO World Heritage Sites, Yellowstone National Park (a UNESCO site) is a 1.5-hour detour north from Idaho Falls via US-20. While not directly on route, it’s a logical side trip if time allows. The park’s geothermal features and wildlife are unparalleled.

• UNESCO site nearby: Yellowstone (geothermal basins, Grand Canyon of the Yellowstone).
• State parks: Harriman State Park (Idaho) offers birdwatching and fly-fishing; Curt Gowdy State Park (Wyoming) has mountain biking.

Climatic conditions vary dramatically: McCall averages 30 inches of precipitation per year, while Pinedale gets only 12 inches but twice the snow (up to 200 inches). Summer temperatures peak at 85°F in the valleys, dropping to 50°F at night. Fall colors peak in late September along US-26.

• Recommended seasonal timing: July–August for warmest weather; September for fewer crowds and autumn colors.
• Wind: The Snake River Plain experiences gusty winds (30–40 mph) in spring; a crosswind warning system exists on I-84.

The drive from McCall to Pinedale requires careful fuel planning, especially in the remote stretches of eastern Idaho and western Wyoming. Gas stations become sparse after leaving Idaho Falls, and the last reliable stop before Pinedale is in Jackson, 80 miles north—but that adds a detour. Better to fill up in Idaho Falls or at the Sinclair station in Alpine, WY (mile marker 10 on US-89).

• Fuel cost estimate: $45–$60 for a standard sedan (gas prices ~$3.50/gal).
• Recommended fuel stops: McCall (start), Boise (if needed), Idaho Falls (full tank), Alpine (top-off).
• Avoid fueling at small stations between Arco and Idaho Falls; prices are higher.

Road conditions are generally excellent along interstates, but US-26 east of Idaho Falls becomes a two-lane highway with occasional wildlife crossings (elk, deer). Winter travel requires chains or snow tires, and summer thunderstorms can cause sudden visibility drops.

• Best travel windows: June–September for clear roads; October–May expect snowpack from Idaho Falls onward.
• Mobile coverage: LTE on interstates; dead zones from Arco to Montpelier (30-mile gap).
• RV/passenger vehicle: OK for standard cars; avoid oversized vehicles on unpaved overlooks.

Infrastructure safety is high on interstates but drops on two-lane segments. US-20 west of Idaho Falls has sections with no shoulder; US-189 has steep grades and sharp curves near Hoback Junction. Keep a distance of at least 4 seconds from the car ahead on winding roads.

• Road quality: I-84 (excellent), US-20 (good), US-26 (fair with some patched asphalt), US-189 (good but winding).
• Emergency services: Idaho State Patrol coverage is good near cities; Wyoming Highway Patrol covers the Pinedale area with response times of 20–30 minutes.
• Cell reception dead zones: Max from Arco to Montpelier; download offline maps.

For family and child suitability, the route offers numerous kid-friendly breaks. Craters of the Moon has a visitor center with interactive exhibits and a Junior Ranger program. Bear World in Rexburg lets children feed bears from the car—a highlight for ages 3–12.

• Best stops for kids: Craters of the Moon (volcanic tubes to explore), Bear World (drive-through wildlife), Teton Scenic Byway (views from the car).
• Rest areas: Rest stops near Arco (picnic tables, restrooms) and Alpine (clean facilities).

Pet-friendly framework is straightforward: many national forest lands allow leashed pets, and Craters of the Moon permits pets on trails (except in caves, to protect bats). Hotels in Idaho Falls and Pinedale typically charge $20–$30 per pet.

• Pet stops: Dog-friendly hiking at Palisades Reservoir; fenced dog parks in Idaho Falls (Tautphaus Park).
• Accommodations: La Quinta in Idaho Falls (no pet fee); Best Western Pinedale Inn ($25 pet fee).

Fatigue management and rest zones are critical: drive time is around 8 hours with stops. Plan a mid-drive break in Arco (2 hours from Boise) to stretch and explore the lava fields. Another good break point is Alpine, where US-89 meets the Snake River Canyon.

• Recommended rest stops: Arco (Craters of the Moon), Idaho Falls (river walk), Jackson (if detouring).
• Fatigue prevention: Switch drivers every 2 hours; avoid driving between 1–3 PM when sleepy.

Hidden off-route spots enrich the journey. Just north of Alpine on US-89, the town of Afton boasts the world’s largest elk antler arch in its park—a quirky photo op. Near Montpelier (exit 5 on US-89), the Oregon-California Trail Interpretive Center offers free exhibits on pioneer history.

• Lesser-known stops: Hell’s Half Acre Lava Field (public fishing access), the ghost town of Shoshone (abandoned mining structures).
• Cultural notes: The Shoshone-Bannock Tribes have reservation land near Fort Hall; the Fort Hall Replica Museum tells their story.