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Idaho: Boise, Stanley & the Sawtooths – Route Guide
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Follow Idaho 21 from Boise through the public history of Idaho City and the Ponderosa Pine Scenic Byway to Stanley, then cross the Sawtooth Scenic Byway to Ketchum and Sun Valley. Redfish Lake and signed public stops define the route; rafting, boats, hot springs, long hikes, lifts and providers require separate decisions.
Idaho: Boise, Stanley & the Sawtooths is a 310 km one-way journey (self-drive). It works best as a 4-day trip; the plan below is the 4-day version for August, built from 125 verified places, with real road-routed transit times, opening hours and daylight checked.
Plan your own version → 4-day plan · best time to go
The route
What you'll see
Choose your length
When to go
Best months: July, August, September
The Ponderosa Pine and Sawtooth scenic byways, Redfish Lake and public town stops form the baseline. Check Idaho 511, wildfire, smoke, forest restrictions, trail status and early snow; rafting, boats, hot springs, lifts and guided activities remain optional.
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