Tolmie lies on a split cove and is a destination for beach exploration, swimming, hiking, clamming and crabbing. It is popular with scuba divers because of an underwater park with an artificial reef, and a saltwater marsh offers birdwatching. Part of the park was posted as partly closed through Nov. 30, 2026. Hours are 8 a.m. to dusk in summer and 9 a.m. to dusk in winter.