I rode the Alpine Trail last fall and though I prefer gravel over single track it was fun but a challenge. I parked in Westfir at the Office Bridge parking lot. From there I headed up the National Forest Road-19 ( Aufderheide ) a few miles and then headed on to forest service road NF-1912 for a tough hour climb up to Windy Pass which has a fork and opened intersection. I stayed to the right on to NF-1911 and a short ways further was the trail off to the left. Its a little hard to find the trail, but it is obvious once you see it. From that point you are on single track and it’s a roller coaster ride from there. Be careful and have fun.