Thank you Sarah. I go out every summer for 2 weeks & will do the same this summer. The ride will be at the end of my stay. I do not have a problem riding at altitude as long as I keep my heart rate at 150 or below. Once it gets above that for long, I crack. And I have already ridden most of the course. The climb over Juniper Pass is the only one I have not done. I'm hoping to be able to pre-ride that portion before the actual ride.

Thanks so much for your input!