Definition of treks:
(n) :
A slow or difficult journey.
(n) :
A long walk.
(v) :
(intransitive) To make a slow or arduous journey.
(v) :
(intransitive) To journey on foot, especially to hike through mountainous areas.
(v) :
(Nigeria) To travel by walking.
(n) :
(South Africa) A journey by ox wagon.