Tunnel

Tunnel is a 2.6-mile-long single track in the Manzanita Mountain Trail System. It is accessed either from the Tunnel Trailhead or Otero Trailhead off State Highway 337, south of the town of Tijeras, New Mexico. The trail is full of tight curves, switchbacks, and rock obstacles. The south end is pretty fast and flowy and flat, gaining 300 feet in the first mile, then dropping 500 feet over the next 1.6 miles as it heads north. The trail has lots of intermittent small rock ledges that are one- to two-foot-tall blunt ledges and are kind of jarring. There are lots of sections of shelfy narrow flowy trail between the obstacles. Some of the ledges are on the shelfy sections as well, which makes them more difficult. You can make this a loop with Birdhouse, which is more difficult.