Arken is a mountain in the Ayai'leh-hirh range on Trill. It commands of a view of the entire Ayai'leh-hirh.

According to Gohod Clif, the first time one climbs it, one should climb it alone. He says it saves the need to think one has to say something while taking it all in. Clif owned a holodeck program simulating the mountain called "Arken One." (TNG novel: Intellivore)

the planet Trillius Prime
cities and settlements	B'tar • Chi'tar • Gheryzan • Iklan • Kural • Leran Manev • Mak'ala • Murona • Shator • Tear'c • Vor'lan • Vrans
landmarks and geography	Ayai'leh-hirh (Mount Arken • Ilrienh • Noraikghe • Oraidhe • Sethe) • Caves of Mak'ala • Deln Mountains • Devritane Museum • Dorabi subcontinent • Dorvan mines • Ganses Peninsula • Hoobishan Baths • Irnek Peninsula • Kem'alta Institute • Korchub Mountains • Lekarna Mountains • Manevri • Najana Library • Nalep Mountains • Tash Mountains • Tenar • Tenara (Tenaran Ice Cliffs • Tenaran Music Academy) • Thorain Mountains • Trill Senate Tower • Urot Mountains • Venar Mountains
bodies of water	Aldar Bay • Dara'air Ocean • Lake Ograls • Manev Bay • Sea of Arlibath • Troyval Ocean • Turek Sea • Uzonn Ocean