Tanivalis is a valley located in northwestern Hannaderres, on the world of Lezaria, situated within the Thorndelle Mountains. In ancient times it was known by the name Trivallis.

At the northern end of the valley along the coast of the Mirandarine Ocean lies the city of Port Fins. South, in the mountains, lie the ruins of Aurora, which was destroyed in 2337 by the dragon Jeruph.[1] Further up in the mountains not far from the ruins lies Aurora Core, one of the most powerful nodes on Lezaria.[2]