Noun
canyoneering (uncountable)
(US) Canyoning, a hybrid outdoor sport involving the traversal of river canyons.
It begins with a letter from then-superintendent Walt Dabney, to Matt Moore, the owner of one of the canyoneering companies. Source: Internet
It was also apparent that the Arches staff does not see a current problem with commercial canyoneering or its climbing policy. Source: Internet