Hamlin Peak is a 4,756-foot (1,450 m) mountain located in Baxter State Park in Piscataquis County, Maine. Hamlin Peak is a northern spur of the greater Mount Katahdin massif and is flanked to the south by Baxter Peak, and to the north by the . Since it rises nearly 500 feet (150 m) above the col joining it to the higher Baxter Peak, Hamlin Peak qualifies as a four-thousand footer based on the topographic prominence criterion used by the Appalachian Mountain Club, and is ranked as the second-highest peak in Maine. There are several trails that lead to or near the summit of Hamlin Peak.