Highline Trail is a great little trail that will test you in the beginning then rewards you with a fast following end.
Start the trail by taking a right off of the forest service road. It climbs right from the get go and is filled with tight turns. At your first descent you'll come a pile of bones, which you should circle in a clockwise direction, then exit to the west.
Gain speed as you exit the circle and you'll be going up hill quickly. Once to the top of the hill you'll side hill to another short climb. After a few turns through the sage you'll have another quick descent and climb followed by the fast romp through the sage.
You'll exit back on a forest service road. Straight across is The Plunge
Trail, following the road downhill to the right will led to The Trough
and Father of Ginormous
, downhill to the left leads back to South Porcupine
Trail, Prince Creek Road, and/or the start of Highline.