Smith Conservation Land, 115 acres, is owned and managed by the Littleton Conservation Trust, a nonprofit organization dedicated to preserving and protecting the town's natural resources. The land offers several trails for hiking, biking, and wildlife viewing. Smith Conservation Land is open to the public year-round, from dawn to dusk. Visitors are asked to respect the land and its wildlife and to follow the rules posted at the trailheads.

To the east of Whitcomb Avenue, walk down to the Beaver Brook marshes and view the heron rookery in the distance. To the west of Whitcomb Avenue, enjoy a deep woods walk to a stunning ravine trail with views of Black Pond and scenic marshes. This trail passes an vernal pool and interesting geological features and loops back to the parking lot. With a parking area on Whitcomb Avenue in Littleton, and trail loops now open on both sides of the road, Smith Conservation Land boasts expansive views of both Beaver Brook Marsh and Black Pond Ravine.