The Terrapin Mountain Trail starts at Camping Gap off of Hunting Creek Road. There is a steep water bar right at the beginning of the trail. Past this, the trail continues to climb up a steep grade. There is a left turn about 50 yards up, and from here the trail upgrades to hike-a-bike steepness.
For most mortals, continue hiking for a while until you reach the ridge. This part will be manageable for a bit, so look for another left turn that will go around the side of the mountain (staying straight goes to the top). This part is very technical - narrow, rocky, and off-camber sections make it a little tricky but doable. After a short pitch up, you'll connect back with the trail that comes over the top of the mountain. Continue to the left.
This part becomes a sweet ridge ride with some fast chutes, technical downhill switchbacks, and some short rock garden areas. Watch for a nice overlook on your left, which is a good place to stop because the rock drop just after is hard to navigate.
After the overlook and more switchbacks and rock sections, you'll take a sharp right turn. Just past this, you'll get to a huge downhill rock garden that goes to the left. It may look like the trail ends, but no...this is still the trail. This part IS rideable, but not recommended. After 100 ft or so, there is a large bridge-like rock and the trail turns right.
This part is still rocky, but flatter so it is more manageable. The final part is a fast downhill with loose rocks that is very sketchy. After this, it opens up into a doubletrack section where you can continue onto Terrapin Mountain Lane or take a right onto the Terrapin Mountain Low Road