Originally Posted by
DarcyInOregon
You should do a full century over similar terrain as the brevet first. It is more than doing the mileage. It is about all of the things that can happen to the body during a long ride, how to recognize incipient signs of problems and what steps to take immediately to avoid having problems. You are over the age of 50, correct? It is different cycling for an older person than it is for a young person, and the older body may struggle with increased distance whereas a younger cyclist may not have any difficulties. You need to do a century first, to find out if anything will happen. It is a big difference between 60 miles and 100 miles.