Hiking is a sport. Wikidata lists 6 disciplines or variants under it.
PractitionersHiker, Hiking guide

Family tree
Disciplines and variants
6
AquajoggingAquajogging is a cross-training and rehabilitation method using...
Mountain hikingHiking in mountain terrain
Mudflat hikingType of walking recreation
Naked hikingHiking nude
Thru-hikingStyle of hiking
VolksmarchingFitness walking