It’s a lovely hike, but definitely challenging if you’re a casual hiker. The trail is narrow, steep in places with lots of rocks and roots. We got to the rock surface not far from the summit, having covered 5/6ths of the Mud Brook Trail, but chose to eat lunch and head back down. It took us almost 3 hours to get to that point, and we had read that markings toward the top/end of the trail (headed toward connection with Caribou Trail) were not great. Rather than wander in search, we headed back down, reaching the parking area in 2 hours 15 minutes. Saw only one other hiker (clearly experienced based on gear) who set a good pace. No trail markings, but we were mostly able to follow (strayed off twice - once up, once down - but recovered without wandering too far from trail). Bugs bad at summit, but no problem moving along the trail. Need good footing/balance crossing brook in several places, but lovely surroundings make the terrain and summit views worth the challenge.