Holbrook Island Sanctuary State Park, Nature reserve in Brooksville, Maine

Holbrook Island Sanctuary State Park is a nature reserve in Maine that combines coastal woodlands, wetlands, rocky shorelines, and open meadows. The property spreads across about 1,345 acres (545 hectares) along the waters of Penobscot Bay.

The sanctuary was established in 1971 when Anita Harris donated land she had acquired during the 1960s to preserve the coastal environment. Her gift transformed this area into a protected space for public use.

The sanctuary keeps the name of Holbrook Island, the offshore island within its boundaries. Anita Harris, who donated most of the land in 1971, asked that it stay in its original state with minimal modern improvements, so the woods, marshes and shore look much as they did when she assembled the parcels from the 1960s onward.

The park has about 11 miles (18 kilometers) of trails open for hiking and cross-country skiing in different seasons. Kayaking and canoeing are possible from Tom Cod Cove, which offers water access.

The preserve covers 1,345 acres, of which 1,230 were donated by Anita Harris in 1971; the offshore Holbrook Island is part of that gift. Harris had been buying land in Brooksville since the 1960s, and the park is kept in its original state with minimal modern improvements.