資料來源 : Webster's Revised Unabridged Dictionary (1913)

Trekker \Trek"ker\, n. [D.]
   One that treks. [Written also {trecker}.] [South Africa]
   --James Bryce.

資料來源 : WordNet®

trekker
     n : a traveler who makes a long arduous journey (as hiking
         through mountainous country)