I've ridden in Death Valley when it's been over 100 and here in the Delta when it's been in the high 90s. I take the heat pretty well once I'm acclimated. I find that if I keep moving and can create my own evaporation system, I do okay. Jobob can attest to how much I sweat even on a coolish day. But you have to be sure you stay hydrated. Everyone is different. There were other folks on that Death Valley ride who cramped up and couldn't move.

V.