Thank you for all your encouragement and advice. I made it!
I was the 3rd person to finish in my group, we had about 15 riders. I think it hit 90 out there (Palm Springs), not too sure. I did not get one flat, but almost everyone in my group did, one gal got 4 flats. I rode my own pace, the first 30 miles, then speed up with the groups help the next 30. There were so many flat tires that we eventually had to split up. It took my about 7 hours.