Definition of through-hike in English:

through-hike

verb

North American
  • no object And with object) to walk the entire length of a long-distance trail (especially the Appalachian Trail) in a single continuous hike.

noun

North American
  • A single continuous hike along the entire length of a long-distance trail (especially the Appalachian Trail).

Origin

1980s; earliest use found in Harper's Bazaar. After through-hiker, through-hike<br>1970s; earliest use found in The New York Times. After through-hiker.