I think you can do it. With a nice break in between to rehydrate and fuel up your body you should have no problem. And think how pleased you'll be when you accomplish something that was a bit of a challenge.

I just did a ride WAY out of my comfort zone. On my recent trip to So. California, I rode 75 miles with 4750 ft of climbing in 80 degree heat on a rented bike. My husband and brother in law kept saying how hard the route was and that they would come looking for us in case I needed a ride home. Nothing gets me going more than someone saying I can't do it. I surpassed my expectations and had a fantastic ride. And now my BIL thinks I'm some kind of super bike rider

For what it's worth I ALWAYS take two Aleve before any ride over 50 miles. bikerHen