1) Bikepacking
Bikepacking is essentially backpacking, but with a bike. Any ride that includes an overnight stay, bikepacking trips are usually off-road and light on gear (as opposed to fully fledged touring).
Instead of taking your bike camping, try taking camping on your bike.
2) Gravity Endruo
Gravity Enduro is a discipline that combines elements of downhill and cross country riding. Tracks are less technical than traditional downhill, with riders competing for the fastest time in a stage-race format. Get timed charging the downhill section, then ride over the to the next stage and repeat.
3) Off Road Triathlon
Off Road Triathlon is the three discipline format we all know, just transplanted to an off road setting. Swim (sometimes kayak) through a creek, followed by trail riding and running. In case triathlon wasn't demanding enough for you, add the technical demands of an off road course to keep it interesting.
4) Cyclocross
Cyclocross racing involves laps of a short course featuring terrain such as pavement, grass, hills, and obstacles that require the riders to dismount and carry their bikes around/over/through. If you can't decide whether you prefer road racing, mountain biking or Tough Mudder, this is the event for you.
