I was pleased to see someone who did the 100 mile ride in under 5 hours write about the killer hill:
I feel sorry for anybody doing that ride who didn't know about Maw Bridge in advance. It's pretty shocking to see that wall appear in front of you. Even some of the guys in the front racer pack gasped at the sight of it.I went back Sunday and rode it again because I had a new heart rate monitor and wanted to see how high my heart rate would go on a really serious hill. I hit 195, stayed above 190 for at least a minute. I guess I get to be a member of the Hummingbird Heart Club (by the simplest method my predicted maximum heart rate would be 171).