Find the Rockland Trust bank between Main St and Stow St just east of 95/128. (Riding up Main St isn’t great but you could go through Brandeis and Cedarwood, also a big hill but no traffic, or take the 70 bus to the end.)

Exiting the bank parking lot, across Stow St is the unofficial entrance behind a gate that’s usually open or you go around it. Follow the informal path across the old rail bridge, keep going straight and follow the power lines. It’s all rideable except the second bridge which is short. After the second bridge (over the MBTA Fitchburg Line) the pavement starts. On the left there are some easy MTB trails too.

If you want only pavement, find Kendal Green T station and go south about a half mile to the trail. Getting there is more sketchy than some dirt because it’s hilly and shoulder less.