Buena Vista Night-O
I'm not sure how I pulled it off, but I finished ahead of John (by just two seconds, whereas I'm usually 10+ minutes behind him), and also ahead of Sharon and a few other usual competitors.
Also, after the race, I survived sleeping in a tent -- which seemed very entertaining to lots of people (I apparently have a reputation as someone who hates camping). ;-)
* Update with tracks: I didn't realize I had drifted so far off the line on my way to #5; luckily, the reentrant caught me. I drifted way too far off my bearing and lost track of the reentrants on my way to #11. #14 didn't have a reflector, or I bet I would have spotted it from a long ways away (open forest in that area).