Holbrook Island is a 3 mile loop trail located near Harborside, Maine. The trail is primarily used for hiking and sea kayaking and is accessible from June until August.
This is a beautiful island South of Castine with a loop path and various spur trails through meadow and woodlands. No part of this trail is difficult and many options are available to modify the length. Land dinghy at the dock on the SE side of the island.