A mix of super-cross and enduro held indoors over obstacles resembling a trials track. Tracks incorporate various elements of off-road riding, including rocks, boulders, logs, sand, mud, a water-hole and special obstacles (like giant tires). Riders usually crash numerous times. Pretty much the greatest thing since sliced bread.
Person 1: "Hey, you wanna go over to that off road park and do some Enduro riding?"
Person2: "Sounds fun, but I'd rather ride Motocross."
Person 1: "Why don't we just ride some Endurocross?"
Person 2: "Good idea!"
Enduro is the concept of riding your overpriced bicycle up a hill slowly while telling misses jokes and drinking electrolytes. Then at the top you ride down as fast as you can in your unfit state. You repeat this process several times and then upon termination of the event you come up with inventive excuses as to why you didn't win.