looks like they give you 12 hours to finish. If you can manage 8.5 mph, you’ll be fine. I’m sure there will be a lot of other fixed gear riders, and I know Dirt has done many fixed gear century rides. You’ll be fine. Enjoy!
It was a fun ride if you get the chance. I would put in the category of the 50 States ride. Good sights, many neighborhoods, but not too serious. Very diverse crowd, Cervelos to Huffy’s.
Btw, easily done on a fixed gear. Only a few very doable hills. I sometimes forget how many hills we hit in Arlington on even the shortest commute.
Beside, getting some real pizza was worth the sweat.