The Arlanga Mountains were a mountain range on the planet Vulcan.
History and specifics
The mountains were located within walking distance east of the city of ShiKahr, in the opposite direction of the Sas-shar desert to the city's west.
Young Spock chose to undergo his personal maturity test in the Arlanga Mountains because they were known to be more dangerous than where his formal kahs-wan ordeal was scheduled to occur months later. He reasoned that if he could survive the harder challenge, then he would not fail the actual test in Sas-shar. (TOS novel: Mindshadow)
- Since he was attacked by a le-matya in the foothills of the Llangon Mountains during his personal test, in TAS episode: "Yesteryear", the Arlanga Mountains were either past the Llangon Mountains or another term for them.