1. Ride website says: "The 103 mile century ride includes challenging hills with approximately 6100 ft of climbing"
2. The ridewithgps.com route I found, which looks accurate when you compare the elevation profiles, says 8,751 feet of climbing.
3. A mapmyride.com route I found, which also looks accurate, shows only 4,475 feet
I guess I'll find out next weekend. I grew up in SD, Hermes, and think you are right that 6,100 seems more likely to be accurate.
And of course I intend to break all the century rules for this one. I'll (hopefully) be on a new bike, and using a different saddle. The new saddle is a narrower model of what I've been using, and I'm going to ride it this week to show I'm not a total lunatic. If it isn't God's gift to my butt, I'll use the old one.
Nothing shows whether you got the fit right like a hard century, right?