Just picked up an R1200GS. I live in Somerville/Boston. I'd like to find some areas *nearby* (not update NY) to do a little bit of light trail riding, gravel, sand, etc... as I'm learning how to manage this beast. Honestly, even short 2 mile trail segments would be fine for me. I just need somewhere to practice for 30 minutes at a time or so. But I can't find anywhere nearby that isn't paved. Its a concrete jungle out there. The nearest I've found is Plum Island, which has a few miles of packed gravel with ruts. Ideas? Again, as close as possible to the city is the best, so I don't have to spent 2 hours getting there, ride for 20 minutes and then 2 hours back.