Cyclocross

 For those unfamiliar, cyclocross is a unique type of competitive racing that combines the speed of road bike races with the terrain of mountain bike events, held on shorter, spectator-friendly courses. Cyclocross bikes resemble road bikes, but with slightly wider, knobby tires for traction on off-road surfaces. Racers typically hop off and carry their bikes up steep uphill sections and over various types of obstacles in races that last between 30 and 60 minutes.