Northwest of Plymouth near Warren, the Warren Recreation Rail Trail is a 7 mile route open to off-road motorcycle trails riding. The trail offers nice views of Black Brook.
To reach the Warren E Haverhill Recreation Rail Trail dirt biking trailhead from US93, use Exit #26. Head west on SR25 for roughly 20 miles into Warren. The trail begins near the very large Redstone rocket display in the town center. The Warren Recreation Rail Trail starts by following a dirt road into the woods located behind the rocket.
Overall, Warren Recreation Rail Trail is the 10th most popular dirt bike trail of all 18 dirt biking rides in New Hampshire.