[verb] [I usually + adverb or preposition] -kk- - to walk a long distance, usually over land such as hills, mountains or forestsWe spent the day trekking through forests and over mountains.He's going trekking in Peru this summer.(informal) I trekked (= walked a long and tiring distance) all the way into town to meet him and he didn't even turn up.
TREK
Meaning of TREK in English
Cambridge English vocab. Кембриджский английский словарь. 2012