Trøndelag is one of the most fertile regions of Norway, with large agricultural output. Trøndelag is home to great valleys, major rivers famous for salmon fisheries, and a few major islands as well as thousands of smaller islands.
Gauldal or Gauldalen (English: Gaula River valley) is a valley and traditional district in Trøndelag county, Norway. The river Gaula runs through the 145-kilometre (90 mi) long valley from the Røros mountains near the lake Aursunden to the Trondheimsfjorden.