I'm glad you enjoyed SBP. Tons of FORCers have put in hour and hour building and maintaining singletrack that everyone can enjoy, and I think the goal has been pretty well met.

As far as the sustainable part...I'm assuming you are referring mostly to L.T. There are a couple sections that we knew were questionable when we built them, but have actually held up a bit better than expected. That area of SBP is so steep it was quite a challenge to put trail in that we were 100% comfortable would be sustainable.