Grouse Creek Road, FS 166, starts as a wide two-lane gravel road with cabins on both sides. After a few hundred yards, the road enters the Boise National Forest and narrows but remains a nice gravel road. The last couple of miles are dirt, a bit rocky, but still accessible by pretty much any vehicle. FS 166 continues slightly beyond this track but becomes a narrow, rocky, two-track trail suitable only for true offroad vehicles and then becomes a snowmobile/ATV route. The primary hazard along the road is blind curves.
FS 166 starts by climbing and winding along the creek drainage. About halfway along the route, the road comes out on the top of a ridge it follows for several miles. The views are spectacular! Like most of this part of Idaho, areas have burned and have standing dead trees. The last couple of miles are rougher as the road winds off the ridge to another drainage. There are many side roads and trails, which should provide ample opportunity for further exploration.
Although there are no designated campsites, there are ample opportunities for dispersed camping, with site sizes ranging from one or two tents to several large RVs. It might be hard to find an open site during hunting season as the area is popular for hunting deer, elk, and bear.