I took the trail from west to east, starting in the forested section. Shortly in there is a steep climb and there is a lot of up and down along this trail. Most of the trail is gravel or exposed bedrock but in some places I was glad to have my boots and not just sneakers. Not much shade even in the forested section, so don't forget your hat.
Great park, large well kept serpentine barrens, like going to a different state, completely different from the rest of PA. The trails in the barrens have ZERO shade so I recommend spring and fall. Rolling hills, grasses and a few trees. if you are not familiar I would read up a little one this unique ecosystem before you go, you will appreciate it more.