Great loop. We hiked this with 30lb packs as a training hike for an upcoming backpacking trip and it took us about 4 hours. Beautiful views of Blue Hen, Buttermilk and Brandywine Falls. The beginning of the trail is unmarked and took some navigating. It was also confusing once we came out at Brandywine ski resort. We ended up back on the buckeye trail instead of the towpath and had to do some back tracking. Otherwise it was a Beautiful and challenging hike!