Cody WY to Chelan Falls WA: Ultimate Road Trip Guide

This 850-mile journey from Cody, Wyoming to Chelan Falls, Washington follows US-14, US-16, and I-90 across the Northern Rockies and Columbia Plateau. A lesser-known fact: near Ten Sleep, Wyoming, US-16 crosses the continental divide at Powder River Pass (9,666 feet), one of the highest paved passes in the state.

The drive takes roughly 14 hours of pure driving time, but plan for 2-3 days to absorb the scenery and attractions. Key milestones: Cody to Ten Sleep (140 miles), Ten Sleep to Missoula, MT (400 miles), Missoula to Chelan Falls (310 miles).

Safety concerns include wildlife (deer, elk) on US-16 at dawn/dusk, and sudden weather changes in mountain passes. Carry chains in spring and fall. Fatigue management: break every 2 hours at towns like Greybull (WY), Hardin (MT), and Kellogg (ID).

• Family-friendly: Cody's rodeo and Buffalo Bill Center of the West.
• Pet-friendly: many motels along I-90; rest areas have pet walks.
• Best stops: Little Bighorn Battlefield (MT), Lake Coeur d'Alene (ID), and Grand Coulee Dam (WA).
• Hidden off-route: Pompeys Pillar National Monument (MT), a Lewis and Clark site.

The route transitions from the Absaroka Range in Wyoming to the Bighorn Basin, then the Bighorn Mountains, and finally the rolling Palouse of Washington. UNESCO sites near the route include Yellowstone National Park (a detour from Cody) and the Glacier National Park (far north, not directly on route). In Wyoming, the Bighorn Canyon National Recreation Area is a gem.

• Must-see: Ten Sleep Canyon, a limestone gorge with climbing routes.
• Local commerce: Buffalo's historic Main Street and Missoula's farmers markets.
• For a break, explore how to find the best stops and hidden gems between cities.

Fuel stops are critical on US-16 and I-90. From Cody to Greybull (60 miles), then Ten Sleep (80 miles further) are the only stations. After that, Buffalo, WY offers services before entering the Bighorn Mountains. In Montana, towns like Hardin, Billings, and Bozeman have ample fuel. On I-90 in Washington, Moses Lake and George are the last major stops before Chelan Falls.

• Estimated fuel cost at $3.50/gal: ~$100 for a 25-mpg car.
• Rest areas every 30-50 miles on I-90; fewer on US-16.
• Cell service: consistent in towns, sparse on mountain passes.
• Road conditions: Check WYDOT and MDOT; snow possible up to May in passes.