Other
Bike ride.com: Bicycling Events Calendar
This resource lists cycling events for the entire U.S. and Canada. There is a searchable database that allows you to put in the city you want and how many miles away you are willing to travel for all types of cycling events.
Cool Math
Coolmath: Coolmath4kids: Dirt Bike Proportions
Find the number which makes the fractions equal in this multiplayer race!
Math Playground
Dirt Bike Proportions: Race by Finding Equivalent Ratios.
Proportions where students determine the missing number to make the proportion true.
Arcademics
Arcademics: Tug Team Comparing Fractions
Play tug of war by comparing fractions correctly.