Originally Posted by jsigone

I don't have anywhere that flat for that distance in under 110* temps. Desert riding has other elements in mind as well and not appealing to me. Like lack of Water and wind.

My last weekend's century was the closest I got to a 5hr century ride in a long time and what I'd call close to flattest I can get though I did pick the hard way home. I hit the 100 mile mark around 5h20 min range and was still climbing. I had 19.4mph ave before the real climb started at mile 93.
107.9mi Distance
3,862ft Elevation
05:52:29 Moving Time
4,858 Calories
Elapsed Time 06:31:59
Max Speed 41.4mi/h
Avg Speed 18.4mi/h

http://app.strava.com/activities/75444598