This route is best accessed from the cow trough that marks the end of the Afterthought
Trail. At this same intersection, you'll also find the start of the Ditch Trail. To access Lost Forest, continue across the dirt road and follow the trail until you come upon a fence and doubletrack. Take a left and follow the fence until the singletrack returns on your left. This first portion of the trail will be mostly uphill, but the gentle slopes make it an easier route.
Follow the trail until you come upon the dirt road and take a right onto it. You'll notice that the singletrack begins again on the other side soon. You'll have to ride over the cattle guard to get to the other half of the trail. Take a left immediately and follow the singletrack as it starts a fun descent. Nearing the end, you'll notice that Ed's Crazy Climb will join the trail on the right, but continue straight to follow this track.
The trail eventually ends at Giants Grave Spring.