Seasonal conditions
April to November — summit snow can linger into April; the byway is plowed year-round but rides best June-October.
ROUTE
Ponderosa Pine Scenic Byway — Boise to Lowman over the Summit
The Boise pole route: 121 km of gold-rush history and ponderosa forest from Boise over Mores Creek to the Boise National Forest’s summit country at Lowman — the classic half-day Idaho ride.
scenic-road121 km3.5 hmoderate
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/107640324@N05">Intermountain Forest Service, / Wikimedia Commons / Public domain
ABOUT THIS ROUTE
The route in detail
Highway 21, the Ponderosa Pine Scenic Byway, climbs out of Boise’s dry bench into the Boise National Forest through the richest gold district in Idaho. Idaho City — once bigger than Portland or Seattle — sits at the junction where the pavement turns to real mountain road, and the switchbacks over the summit deliver you to the Salmon River country at Lowman. Fuel in Boise and Idaho City only; the forest between is empty, shady and quintessentially Idaho.
Highway 21, the Ponderosa Pine Scenic Byway, climbs out of Boise’s dry bench into the Boise National Forest through the richest gold district in Idaho. Idaho City — once bigger than Portland or Seattle — sits at the junction where the pavement turns to real mountain road, and the switchbacks over the summit deliver you to the Salmon River country at Lowman. Fuel in Boise and Idaho City only; the forest between is empty, shady and quintessentially Idaho.
PLAN RESPONSIBLY
Season & safety
Key hazards
- Deer and elk on the roadway at dawn and dusk.
- Log trucks on weekday mornings.
- Ice patches possible in shaded summit curves in shoulder season.
- No fuel or services between Idaho City and Lowman.
Required gear
- Certified motorcycle helmet and full protective riding gear.
- Warm layer for the summit section.
WAYPOINTS
Route points
- 01
Idaho City — the gold-rush boomtown (junction to the byway’s high country)
waypoint
MAP & ROUTE
On the atlas
Elevation1,869 m high point824 m low point1,713 m total climbing11% steepest stretch (km 78.6)
DESTINATIONS
Places on this route
Boise & the Treasure Valley
The City of Trees on the Boise River: a greenbelt capital under Table Rock, the world’s raptor capital, and the biggest Basque community outside Spain.
Southwest Idaho
McCall & Payette Lake
A sawmill town turned alpine playground on Payette Lake: Brundage powder, Ponderosa pines, Loon Lake wilderness and the Winter Carnival.
Southwest Idaho
INTERESTS
Why riders & travellers love it
WEATHER
Weather along the route
Forecast data from Open-Meteo. Updated regularly.
REGIONS
Explore the region
KEEP EXPLORING
The atlas continues
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