Menotomy Rocks Park is a 35.5-acre public park that features a variety of natural habitats, including woodlands, wetlands, meadows, and a glacial kettle pond. The park has walking paths, informal playfields, and a 3-acre pond. The park was established in 1896 by the Arlington Land Trust and is named after the Native American word for the Mystic River. The park is open year-round from dawn to dusk and is free of charge.