I can't remember the name of the park, but it was on the north-west side of Rutland right behind a school and along the power line towers. It was small, with a fireroad that ran uphill (I think to a pond), but had one very fun, and very fast downhill switchback that make it worth the effort...
I think I found it on MTBR.com under the trail review section - but could not locate it again...
If you find something good, post it here!