Cape Cod Rail Trail is a thirty-mile long path that follows the
bed of the former Penn Central Rail Road. It winds through the towns
of Dennis, Harwich, Brewster, Orleans, Eastham and Wellfleet. Miles
of paved bicycle trails go through woods and fields, by cranberry
bogs, freshwater ponds, and saltwater marshes.
Nickerson State Park is the official trail head and overseer of
the trail. The Rail Trail itself extends over 11 miles in each direction
from the park and the park itself has some great paths if you like