As it climbs to the Forest boundary above Harrington Lake, the route passes through conifer forests, meadows, and bush. The trail is steep in places where elevations range from 1,000 to 5,400 feet. Hiking and equestrian use are permitted. Summer temperatures are hot. Winter brings periodic snow closures.
Camping is unrestricted but a scarcity of water at upper elevations limits site choice.
Sisson-Callahan NRT 9 miles. Shasta-Trinity National Forests. This trail is 6 miles southwest of the town of Mt. Shasta. Beginning at 3,500 feet elevation near Siskiyou Lake, the trail climbs to the 8,020 foot Deadfall Summit, then drops to 7,200 feet to tie in with the Pacific Crest Trail. Scenery is dominated by Mt. Shasta and Mt. Eddy to the north, the Castle Crags to the south and the Trinity Alps to the west.