In 2237, a young Spock prematurely began his kahs-wan when he journeyed across the Forge towards the L-langon Mountains. Once in the foothills, Spock became cornered by a le-matya, only to be saved by his cousin, Selek, and at the expense of his pet sehlat, I-Chaya. (TAS: "Yesteryear") The novelization of "Yesteryear" (in Star Trek Log 1) spells this mountain range "Arlanga."