From the Lost Trail dropoff follow the Saddle Mountain Road as it contours and descends, stay right and go past the Colter Creek and Divide Trail Trailheads. It is another 1.2 miles to the signed singletrack. The trail is very narrow at first, then drops very steeply to the junction with Shields Creek Trail. Here the trail widens and rolls through timber to a wide meadow. This is very near the Porcupine Saddle, just head across the meadow and climb, the trail is just at the tree line. It is just over 3 miles from the road to the meadow and Porcupine Saddle.
From Porcupine Saddle the trail is all single track to the end. You first climb for about a mile before you get on the ridge. The trail follows this ridge north, staying on it or just on the west side. The first 8 miles is mixed climbing and descending. The last 4 miles is all downhill, great single track.
About 4 miles from Porcupine Saddle you will descend a little bit to a hunting camp. From the camp, turn around and face the trail you came in on, look left and you will see where Warm Springs Ridge Trail continues. Other than this tricky spot it is a very easy trail to follow.
The big forest fires of 2000 have left this trail with alot of deadfall so you will need to be alert coming around corners. Bring a trail saw and some gloves to help gradually make it better for everybody.