The Glen Alpine Springs Trailhead or Glen Alpine Trailhead is located off Highway 89 a few miles north of South Lake Tahoe, CA at Fallen Leaf Lake just to the west of Lake Tahoe. The road to the trailhead is not plowed in winter.
Some of the destinations most accessed by the trailhead are Susie Lake(5mi) and Grass Lake (California)(2mi) as well as the rest of the Desolation Wilderness.
GPS Coords: 38°52'37.63"N; 120° 4'49.47"W (estimated)
References
Glen Alpine Springs Trailhead Wikipedia(Text) CC BY-SA