Senior terrain trekker designated a specific position inside the League of XenoExplorers. In the time of the Galactic Empire's rule, Reginald Danfillo was a member of the league and held the rank of Senior terrain trekker, silver leaf, fullbloom cluster.
The title of senior terrain trekker initially appeared in Star Wars: Smuggler's Guide, a sourcebook authored by Daniel Wallace which came out in 2018.