Lake Interim is a small lake found halfway along the Termina River, forming part of the border between Tersodia and Towerfirth. It is fed from the north and flows out to the south, eventually reaching Crater Lake in Palprofundia.
The town of Firthedge is located on the shore of Lake Interim, granting the city access to water transport along the Termina. While the river does not reach the ocean, its connection to Crater Lake connects Firthedge with the town of Northlon.