according to the webster dictionary:
trek is:
# [noun] a journey by ox wagon (especially an organized migration by a group of settlers)
# [noun] any long and difficult trip
# [verb] journey on foot, especially in the mountains; "We spent the summer trekking in the foothills of the Himalayas"
# [verb] make a long and difficult journey; "They trekked towards the North Pole with sleds and skis"
