I've been tooling around the Berkshires (1500 ft) all summer on my bike. I took a 15-20 mile ride through rolling hills a couple times a week after work and felt great. I took a 40 mile ride one day and it was tough but I did it. I've just moved to Santa Fe and my bike arrived UPS yesterday. My 3 mile commute today felt like the air was full of chlorine or sand. Can't wait to go back East and fly like the wind!