Hiking Flagg Hill Conservation Area is a 1.5-hour ramble through the forest and by wetlands, with intriguing signs of earlier land use to consider, plus additional side excursions. Easy except for Erickson Loop, which has a steep section. Trails link to Stow’s Heath Hen Meadow Brook conservation area, and through Boxborough to Windemere Drive. Additional extensions are possible across West Acton Road to Captain Sargent Land, and from there to Red Acre Land.

The Flagg Hill trailhead in Stow is located to the left of a gray-painted concrete storage building on the west side of West Acton Road, 1.3 miles north of the Stow Fire Department (corner of Hartley and Crescent).

The AllTrails website has a description and map of a hike at Flagg Hill Conservation Land.