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From Boise on Idaho 21 northeast to the junction of Idaho 75 at Stanley.

Length
130.9 miles. Allow 3 hours.

Roadway
A narrow, winding road with some steep grades. Two lanes with some passing lanes. There usually is a snow floor north of Lowman during winter. Severe avalanche conditions exist in the Banner Summit area and road closures can be frequent. Check conditions before traveling in winter.

When to see it
Year round. May be closed in winter.

Special attractions
Lucky Peak and Arrow Rock Reservoirs; Lucky Peak State Park; Idaho City; Sawtooth Wilderness; Granite Creek Interpretive Trail; Lowman Fire Interpretive Signs; Kirkham Hot Springs; Stanley Lake; Boise, Salmon-Challis and Sawtooth National Forests; auto tour cassette and tape player available at the Idaho Department of Parks & Recreation office, Forest Service/BLM Visitor Information Center in Boise, and the Idaho City, Lowman, and Stanley Ranger Stations.