The attached mock up of a WARNING sign is just to give you an idea of the message we want to convey and the tone...dark humor.
Feel free to go crazy so long as the same message (and text or approximate) is conveyed.
Adventure racing involves mountain biking (not BMX), trekking, orienteering, trail running, white and flat water paddling, ropes (rappelling, ascending) and similar human powered activities, usually in remote, hostile terrain.
I'd love to see some designs that included harsh weather, injuries, mountain biking, paddling, rappelling, trekking, etc.
Maybe imagery of racers doing a face plant over the handle bars of their bike...going over a waterfall in a kayak...falling off a cliff...being chased by a bear.
The goal is a shirt that makes people curious about adventure racing by conveying it as extreme, wild, exciting, etc.