The Ayai'leh-hirh range is the largest mountain range on the planet Trill, and one of the largest on any inhabited planet known to Federation scientists as of the 2370s. In English, the name of the range translates to Five Thousand Valleys.
Mountains in the range include Arken, Ilrienh, Noraikghe, Oraidhe, and Sethe. (TNG novel: Intellivore)
In 2376, Ezri Dax saw the peaks of Ayai'leh-hirh in the distance as she piloted the USS Rio Grande towards the Caves of Mak'ala. (DS9 - Worlds of DS9 novel: Trill: Unjoined)
| the planet Trillius Prime | ||
|---|---|---|
| cities and settlements | Bana • B'tar • Chi'tar • Gheryzan • Iklan • Kural • Leran Manev • Mak'ala • Murona • New Scirapo • Shator • Tear'c • Tresh • Vrans • Ymoc City |  
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| 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 • Vor'lan mines | |
| bodies of water | Aldar Bay • Dara'air Ocean • Lake Devritane • Lake Ograls • Manev Bay • Sea of Arlibath • Troyval Ocean • Turek Sea • Uzonn Ocean | |
| lifeforms | cutter termite • eomreker • feather-ape • fenza bird • ilrienh • mreker • mudcrawler • noraikghe • sethe • silikh fly • skutfish • yilga moth | |