Designed for those ready for an extended ride in the backcountry, this trail has steep climbs with long, fast descents. The loop follows the Toiyabe Ridge, past the radio towers, to the top of the drop to Birch Creek. This drop is a great descent! Birch Creek is a beautiful canyon with aspens, junipers, and a multitude of springs. Then get ready to climb out through the canyon on an old pack trail. A mine at the top marks the end of the long climb. You then descend through switchbacks to the return trail connecting to the Castle Loop Trail #1.