School's out, so there's no better time to tour the campus. Cruise 2 miles to earn your Campus Loop badge, and if you're feeling loopy then by all means stay up late and study the course as long as it takes to get an A.
Ride as many times as you like. No need to register, you just need to sign in on the Bike and finish your ride during the week! The ride of the week starts and stops at midnight USA Eastern.
Here is suggested listening for Campus Loop to help get you going!