I wasn't really ready or totally in shape, but felt pretty good actually and finished the ride just in time. I had company this time, too, which made it more fun. And it helped that the other rider was also on a fixed gear, which made it much easier to ride together on a route with that amount of climbing. Ride report is here:
If anyone is interested, the ride won't be run next year, but maybe if there are enough requests for it, it will be back. It's a gorgeous, scenic ride at a beautiful time of year for foliage in West Virginia. It is not for the faint of heart - it's a really challenging, relentless ride. But well worth it.