Innsvatnet is a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in the municipality of Verdal

Verdal

Verdal is a municipality in Nord-Trøndelag county, Norway. It is part of the Innherad region. The administrative centre of the municipality is the town of Verdalsøra...

 in Nord-Trøndelag

Nord-Trøndelag

is a county constituting the northern part of Trøndelag in Norway. As of 2010, the county had 131,555 inhabitants, making it the country's fourth-least populated county. The largest municipalities are Stjørdal, Steinkjer—the county seat, Levanger, Namsos and Verdal, all with between 21,000 and...

 county, Norway

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

. The lake lies in the eastern part of the municipality, just west of the border with Sweden

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

. The lake is the headwaters for the river Inna

Inna (Verdal)

Inna is a river that flows through the municipality of Verdal in Nord-Trøndelag county, Norway. The river begins in the east at the lake Innsvatnet, located near the border to Sweden, and it runs west to Vuku at the confluence of the rivers Inna and Helgåa, which together become the river...

, which later flows into the Verdalselva

Verdalselva

Verdalselva is a long river in the municipality of Verdal in Nord-Trøndelag county, Norway. The river begins at Holmen in the village of Vuku at the confluence of the rivers Inna and Helgåa. The river Inna drains the lake Innsvatnet near the Swedish border and the river Helgåa runs from the...

river. The 3.9 square kilometres (1.5 sq mi) lake sits at an elevation of 415 metres (1,361.5 ft) above sea level.