noun
trekker
Refers to a person who enjoys trekking, especially in the context of long-distance hiking or mountain trekking. Often used for enthusiasts of outdoor trekking activities.
彼は熱心なトレッカーで、毎年ヒマラヤに行く。
He is an avid trekker and goes to the Himalayas every year.
Borrowed from English 'trekker', derived from 'trek' (from Afrikaans 'trek', meaning a journey or migration).