The trail to Hell Hole Lake is known as Main Fork Stillwater Trail on USDA Forest Service maps. Access to the trail is also available by going down Christmas Meadows Road (057) off of Mirror Lake Highway (Route 150)for one mile then turning right onto the oil exploration road. You may park by the gate (DO NOT BLOCK THE GATE) and continue south down the road, where it will tie into the trail.
Thanks for the info. I added it into the page.