How about a short video of some of my favorite orange sections in the Fells:
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I moved to the Blackstone Valley ~9-10 years ago, but it used to be Yokun Ridge then everywhere else. Yokun is the area up on the hill beyond Kennedy Park. (Bring your legs and lungs, you'll need them). However, one of the few places where it seems your downhills are as long as the climbs.
I hear there's been a bunch of trail work done at Pittsfield SF recently, but I haven't seen any of it.
Last weekend was the official NEMBA opening of the fells, even though they'd unofficially been open for a couple of weeks. Here's some shots of folks out enjoying the great weather and trails. Saw a couple of great looking Fat Bikes out there too.