Trail maps for Pine Mountain can sometimes be found at the trailhead on the East side on Grantville Rd.
Hike down the white blazed Billings Trail {Called the Tait Section} until you get near the geocache GC16E3A "Got Wood? Series: Stumped". From there, you will see a trail heading down the hill to a small bridge. Over the river and through the woods, there will be an intersection. Take the Scarlet Tanager trail loop on the left up to the Pine Mountain summit and cache.
Keep following the trail which becomes the Pine Mountain trail until you get to another intersection, then you can either take a left and start climbing the East Summit trail loop and grab that cache, or take a right at the intersection to return to the Billings Trail.
It is recommended you take coordinates at any intersection to avoid getting lost. This is a very large forest!