If you ever want to see the perfect example of text book singletrack, and you happen to find yourself in the northwest suburbs of Boston then head over to the soccer fields off of Mill Rd in Chelmsford, MA and ride this section of open space. All I can say is UFB! From the gate, there is 500 feet benching that runs between the access road and the water that is perfectly benched with grade reversals and rolling dips.
From this trail you can delve deeper into the trails or have a bit of fun on a pump track nestled into a small knoll between the soccer fields and a swamp.
After a few circuits on the pump track we headed off into the main trail system for some insanely twisty and flowy single track. These are truly text book trails. Skinnies galore, every rideable rock the trail accesses and technical sections are plenty.
At one point we rode up to a big rock, what I like to call a BFR. It turns out that it's a roller and two guys from our group showed us how it's done.