Herd Lake Road
Herd Lake Road is a high mountain road located in Custer County, Idaho, United States, climbing up to 2.778m (9,114ft) above the sea level. It’s one of the highest roads of Idaho.

The road is gravel. Not recommended for large RV. 4x4 vehicle recommended. Expect a trail pretty steep. Starting from East Fork Road (Forest Road 120), the road is 23.01km (14.3 miles) long with 14 hairpin turns.
Pic: Smitty Baker