I'm planning to ride the 70 mile course in the Ride to Montauk
June 16. My sister had been planning to do the 30 mile course, but after a friend canceled, she's now thinking of doing the 70 mile route. The route is very flat.
She is not an experienced cyclist. I don't know if she's done more than a ten-mile ride. She owns a hybrid, but we're both renting road bikes for the race (we live out of state and don't want to deal with flying with a bike). On the plus-side, she's pretty fit. She recently completed a half-marathon in about 2 hours and works out / lifts weights regularly. She's also just a generally tough person. I'm not a super-experienced cyclist; I've gotten into it over the past year, and have worked up to doing 55 miles. I'm confident I can complete 70 miles, but I don't have a good sense of what it'll feel like at the end.
I'm bringing a bike computer, so she can get a feel for cadence early on in the ride, and I have padded bike shorts to lend her. My question is, does this ride sound like the kind of thing a fit person can just show up and do, or is she likely biting off more than she can chew with this?