Castle Rock to Idaho Falls: Road Trip Guide & Distance

How far is Castle Rock from Idaho Falls?

The distance from Castle Rock to Idaho Falls is 467 miles (751.5 km) as the crow flies. Idaho Falls is located NW of Castle Rock. By car, the driving distance is approximately 560.4 miles, taking about 11h 16min. A direct flight would take roughly 1h 26min. Both are located in United States — Castle Rock in Colorado and Idaho Falls in Idaho.

This is a solid day of driving. Be sure to take breaks every 2-3 hours to avoid driver fatigue, and plan your meals ahead of time. Since you'll be heading mostly West, pack a good pair of sunglasses if you plan to drive during the late afternoon to avoid the harsh sun glare.

Coordinates come from public place data for Castle Rock and Idaho Falls. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.