The River Tellerun was situated in the north-western parts of Tortall, running through the Coastal Hills of Barony Olau. Hansevor Remy spoke with the accent from the river, which indicates that he was born near it. The river ended near Port Caynn and emptied into the Emerald Ocean just north of the port. The Tellerun Road ran parallel to it. Until the mines ran out around 217 HE the best silver mines along the coast could be found east of the Tellerun Valley.