(Maine)
Gero Island is a large island on Chesuncook Lake in Piscataquis County, Maine, United States. The island is 3,175 acres (1,285 ha) in area, with all but 133 acres (54 ha) regulated. It is known for exemplary natural communities of slender rush as well as white pine forest and lower elevation spruce-fir forest. Chesuncook Lake was created by damming the West Branch Penobscot River in the 19th and early 20th centuries. (Ref: https://en.wikipedia.org/wiki/Gero_Island)