For those of you who relish long distance challenges, you might want to join this organization.

Website:  http://www.ultracycling.com/index.html

From their website:   UMCA is a not-for-profit membership organization, which promotes endurance bicycling, also known as ultra cycling, around the world. We have members in over 20 countries.

Year Rounder:  Here's something you can do on your own.  If you join UMCA, John Lee Ellis publishes a periodic newsletter highlighting what some of the riders have done around the world.   The UMCA organizes the Year-Rounder which showcases consistent performance in cycling throughout the year. The Y-R includes the Larry Schwartz award which recognizes riders who complete (at least) a century every month. Riders earn certificates, medals and plaques and top riders are recognized in UltraCycling.