Castle Rock to Nampa: Road Trip Guide & Distance

How far is Castle Rock from Nampa?

The distance from Castle Rock to Nampa is 670.3 miles (1078.8 km) as the crow flies. Nampa is located WNW of Castle Rock. By car, the driving distance is approximately 804.4 miles, taking about 16h 11min. A direct flight would take roughly 1h 51min. Both are located in United States — Castle Rock in Colorado and Nampa in Idaho.

This is a serious multi-day road trip! We strongly recommend breaking this journey up with an overnight stay to ensure you arrive safely and refreshed. 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. For a trip of this distance, flying is significantly faster. However, driving offers the flexibility to explore stops along the way.

Coordinates come from public place data for Castle Rock and Nampa. 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.