The broad and long Trondheimsfjord is at the center of this county, although the coastal areas stretch somewhat further north. The mountain ranges Dovrefjell and Trollheimen are located in the south, while the Fosen peninsula is located north of the fjord. The highest mountain is the tall Storskrymten, which is located in the county border between Møre og Romsdal, Oppland, and Trondelag. Its longest river is Orkla which runs through Trøndelag and Hedmark.