Elkhorn Loop features 12 miles of hiking trails near Idaho City, ID.
Take 21 to Idaho City from Boise Go past Idaho city about 15 miles. About half way between Idaho City and Loman there's at switchback with a large parking area on the left and a trail head with a map of the area on the other side of the road. This is a whole network of trails and this is where the Elkhorn loop is.
http://www.tripleblaze.com/trail.php?c=3&i=1119