can·yon·eer·ing 
(kăn′yə-nîrĭng)
(kăn′yə-nîrĭng)n.
The sport or recreational activity of hiking, biking, or boating through canyons, especially the sport of descending very narrow canyons by rock climbing, rappelling, and swimming. Also called canyoning.
can·yon·eer n.