The Cape Cod Rail Trail is a 27 mile mountain bike route from SR134 in Dennis to Le Count Hollow Road in Wellfleet. The mountain bike route passes by salt marshes, cranberry bogs and ponds. It connects with multi-purpose paths into Nickerson State Park and Cape Cod National Seashore (via Nauset Bike Path).
There are three nice side trips: the spur trail to the Chatham town line, the Nauset Trail (1.6 miles) from the Salt Pond Visitor Center to Coast Guard Beach, and the trip east on Le Count Hollow Road to Cahoon Hollow Beach for lunch at the Beach Comber Restaurant on the water.
Overall, Cape Cod Rail Trail is the 13th most popular mountain bike trail of all 35 mountain biking rides in Massachusetts.