Moderate difficulty. Poorly marked but much of the trail is on old logging road so not too impactful. Exception is the segment along the river beyond the campsite (counterclockwise). Keep alert for the occasional ribbon, have a map & follow the contour above the river. Be aware of potentially significant stream crossing @ Copper Cr. Length is variable as there are many side trails to visit. Only elevation changes are going in/out of the gulf. First 1.5 in and last 4 miles out are pretty pedestrian, but the mid section is worth it. Beautiful falls & rock. One could be forgiven for hiking to Copper Creek and back (counterclockwise)-really wouldn't be missing much.