Ultimate 4wd destination: Seafoam Lake
Seafoam Lake is a high mountain lake at an elevation of 2.474m (8,116ft) above the sea level located in Custer County, in the center of the U.S. state of Idaho.
Tucked away in the Salmon River Mountains, within the Salmon-Challis National Forest, the road to the crystal clear lake is totally unpaved, narrow and rough. It’s called NF-010 (Seafoam Creek Road). Do not travel this road in severe weather conditions. 4x4 vehicles with high clearance required.
The road is pretty steep. Starting from NF-008 road, the road to the lake is 7.72km (4.8 miles) long. Over this distance the elevation gain is 572 meters. The average gradient is 7.40%.
Pic: http://ekkercabin.com/images/Idaho/Stanely/BeaverCreek-2011/Seafoam-Rd-Lake/