Here is Part 2 of the Bombing Run that was posted last week. I know it is fiction but having ridden in Zion Park through the tunnel it is hard for me to imagine going 100 MPH through there. Of course every time I have been to Zion it has been daytime an you have to wait on the West Side or the East side so one side but not both can enter the tunnel. There are some great swoopy corners on the West side of the tunnel. There are also some great corners in the Escalante Staircase and the Dixie National Forest. There was a great place to eat hamburgers at Blondie's in Hanksville, Utah but I don't know if it is still there. Utah is a great place to ride.
https://www.cycleworld.com/bombing-run-part-2-story-loss-speed-and-dadsGood story.