Adventdalen is a 30 kilometres (18.6 mi) long valley

Valley

In geology, a valley or dale is a depression with predominant extent in one direction. A very deep river valley may be called a canyon or gorge.The terms U-shaped and V-shaped are descriptive terms of geography to characterize the form of valleys...

 that follows Adventdalselva (Advent Valley River) on the island Spitsbergen

Spitsbergen

Spitsbergen is the largest and only permanently populated island of the Svalbard archipelago in Norway. Constituting the western-most bulk of the archipelago, it borders the Arctic Ocean, the Norwegian Sea and the Greenland Sea...

 in Svalbard

Svalbard

Svalbard is an archipelago in the Arctic, constituting the northernmost part of Norway. It is located north of mainland Europe, midway between mainland Norway and the North Pole. The group of islands range from 74° to 81° north latitude , and from 10° to 35° east longitude. Spitsbergen is the...

, 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 valley and the river flow into Adventfjorden

Adventfjorden

Adventfjorden is a 7 km long and 4 km wide bay on the southern side of Isfjorden, on the west coast of Spitsbergen. The name is a corruption of Adventure Bay, which was probably named after the Hull whaleship Adventure, which resorted to Isfjorden in 1656. The fjord was originally known as Klass...

 and further into Isfjorden

Isfjord (Svalbard)

Isfjorden is the second longest fjord in the Norwegian archipelago of Svalbard. It lies on the west side of Spitsbergen, an island in the Arctic Ocean about midway between Norway and the North Pole, and the largest in the archipelago. A portion of Isfjorden is included in the national parks of...

.

The end of the valley is at Haugen in Longyearbyen

Longyearbyen

Longyearbyen is the largest settlement and the administrative centre of Svalbard, Norway. It is located on the western coast of Spitsbergen, the largest island of the Svalbard archipelago, on the southern side on Adventfjorden , which continues inland with Adventdalen...

, close to the University Centre in Svalbard

University Centre in Svalbard

The University Centre in Svalbard is a Norwegian state-owned limited company that provides university-level education in arctic studies. The universities of Oslo, Bergen, Tromsø and the Norwegian University of Science and Technology in Trondheim are represented on its board. The centre is known as...

. The valley originates from the mountains Slottet and Tronfjellet, under the glaciers Hellefonna and Drønbreen. It runs westwards tovards the Adventfjorden. From northwest, the branch valleys are: Mälardalen, Helvetiadalen, Eskerdalen, Janssondalen, Foxdalen, Bolterdalen, Todalen and Endalen.

On the south side of the valley are several closed mines, and there is a road to these. Mine 7 still is still in operation, 15 kilometres (9.3 mi) from Longyearbyen. The valley has snow scooter trails, and the whole valley has mobile telephone service. At the mouth of the valley was the former location of Svalbard Airport

Svalbard Airport

Svalbard Airport, Longyear is the main airport serving Svalbard in Norway. It is located 1.6 nautical miles northwest of Longyearbyen, and it is the northernmost airport in the world with public scheduled flights. The first airport near Longyearbyen was constructed during World War II...

until the current opened in 1975.