I wasn't able to finish this hike to give it a fair rating but wanted to give future hikers a warning about ticks on the trail:
We started this pretty hike on a beautiful fall day with our pup. Unfortunately, we realized about a mile in that she was covered with ticks--so much so that we decided it would be better to turn around, even though we made an hour drive to get there. As another commenter mentioned, the trail is a bit overgrown with vegetation and I think this was what made it so bad for our dog (we were ok with pants, boots, and long socks). Ticks in the woods happen, of course, but this was worse than we've seen elsewhere on the East Coast. We hope to come back after the first hard freeze when hopefully the critters will be gone. In the meantime, I would avoid bringing dogs on this trail during tick season (her tick collar was no match for the bloodsuckers) and recommend humans plan accordingly.
Lisa B. on Gunpowder Falls State Park-Hereford
Pretty fun trail with some rock obstacles to climb. We ended up doing a mix of the South Trail and the Highland Trail.
Really fun trail, but I'm glad I read the other reviews. I wore zip off long pants (I had to wear the pants for the entire middle part of the trail from the western loop to the northern gunpowder trail). I also brought a towel to dry off my feet after I walked across the river (I just walked barefoot - it was fine and the water didn't go above my knees). I'd suggest starting to the left on each loop. One difficult part at the top of the western loop - coming down a steep hill and then there is a section that has a large tree across it. I just crossed the stream and went down 50 feet or so and crossed back.