You guys down in the Portland area will obviously know a lot more about it than me but I was told of and rode some trails in back of I think it is called Evergreen Cemetary? I can't remember the street it is on, but near the Westbrook exit. A few walking/biking trail out toward the back of the cemetary. Not great, but not bad for a quick couple hours. I'll try to find my Portland city map and get a little more specific later on.
Has anyone been to Bradbury yet this season? I have never been there but I have a friend that used to live in Topsham and ride there a lot. I want to get there this summer. He was telling me just last night about some trails in/around Biddeford?? Does anyone know about that?
If you want miles of singletrack xc, take a trip to East Burke VT and the Kingdom Trails,
http://www.kingdomtrails.com. A fee is charged and it gets busy at times but they have over 100 miles of trails. Some pedal up to, downhill and freeride stuff up on Burke Mtn Ski Area.
Also highly recommend going to Barre VT and check out Millstone Hill trails. A bunch of riding around old granite quarrys. Pay to ride here too. It's cool stuff too.