This is a good trail for beginners, it starts as fairly simple single and double track but becomes mildly technical by the end of the ride.<br />
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The trail is still being created but currently has around 8 miles completed so makes for a decent ride especially because of it's proximity to Boston. It is very well marked until its current end at Stonehurst. You can either ride the trail back after completing or follow the road back to the start.
Take Rt. 2 to exit 58. Turn onto pleasant street towards Belmont Center. Take a right at the third light onto Clifton Street followed by your next left onto Fletcher road. Stay left at the fork followed by your next left onto Juniper road. Park at the Habitat Education Center and Wildlife Sanctuary for the full trail.
http://www.singletracks.com/item.php?c=1&i=5738