Northeast of Greenfield near the town of Northfield, the Northfield Mountain Trail System has an extensive network of mountain bike trails.
To reach the trailhead, follow US91 to Exit 28. Head east on SR10 for 5 miles. Just south of Northfield, proceed south on SR63 for five miles and watch for trailhead parking on the left.
Overall, Northfield Mountain is the 30th most popular mountain bike trail of all 35 mountain biking rides in Massachusetts.