This is a 14 week plan for the beginner cyclist riding in their first or second metric century (100 kilometers or 62 miles). You'll build base fitness and skills on 5-7 hours over 3-4 rides per week. Then you'll work on bringing up your average speed and working up short climbs/hills. Finally, you'll put it all together to be at your peak for the big day!
You should be able to ride 1 hour by yourself and be willing to ride in a group for 1.5 hours at the start on a weekend working up to a max of 3 hours at the end.
Make sure to start the plan on a Monday or end it on the Sunday AFTER your goal event.