I've participated in the MS Society's "City to Shore" ride before. For that ride, the first day's main route is 75 miles, but bold riders can choose to extend that to 100 miles by adding on a 25 mile loop -- IF they get to a certain checkpoint in time.

This will be my first time in the Bike to the Bay. It also has a main 75 mile course on the first day with an option for 100 miles. Does anyone know by what time riders need to reach while mile marker to enter the 25 mile loop? If I'm more speedy than usual, I could do that loop TWICE, and reach 125 miles = double metric century

(Crossposted Charity events, regional forum)