 The public portion of the trail ends after five miles (8 km) at the Bedford/Billerica town line (marked with a pair of gates in the middle of the woods), after which it becomes sandy (requiring a mountain bike or walking on foot) and continues on private property.The Reformatory Branch Rail Trail follows the old right-of-way from Railroad Avenue at Bedford Depot Park to Concord, though the bridges over the Sudbury River and Assabet River near Egg Rock no longer exist.The unimproved dirt hiking trail passes the Great Meadows National Wildlife Refuge.