Gaulosen is a fjord in Trøndelag county, Norway.

The 11-kilometre (6.8 mi) long fjord is an arm off the large Trondheimsfjorden.

[1] This is the only major river delta in southern Norway that has not been affected by land reclamation, and has been used as an industrial area and airport.

During World War II, the Germans planned to build a large city, Neu-Drontheim at Øysand and in Leinstrand.

You can still see the remains of a submarine harbor in Buvikberga between Øysand and Buvika.