Getting ashore via dinghy is easy at the prominent float and jetty. Only dinghies can be tied to the inside of the float.
Hiking the Duck Mountain Trail is rewarding — at the peak of Duck Harbor Mountain, you have a great view of your boat and the outer islands if it is a clear day. If you want a very refreshing freshwater swim, carry on to Long Pond. When swimming at Long Pond, you must be careful of the floatplane air traffic on Isle au Haut International Airport. There are quite a few additional trails in the area. There is usually a map on a signboard at the nearby campgrounds. You can find more information about the park and trail maps, plus information about reserving a campsite.
One can also carry on and walk the road that goes right around Isle au Haut. However, that is quite a long distance, about 7-1/2 miles. As always when hiking in Maine, check for ticks upon returning to the boat.