Olstappen 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 municipalities of Sør-Fron

Sør-Fron

Sør-Fron is a municipality in Oppland county, Norway. It is part of the traditional region of Gudbrandsdal. The administrative centre of the municipality is the village of Hundorp....

 and Nord-Fron

Nord-Fron

Nord-Fron is a municipality in Oppland county, Norway. It is part of the traditional region of Gudbrandsdal. The administrative centre of the municipality is the village of Vinstra. The old municipality of Fron was divided into Nord-Fron and Sør-Fron in 1851...

 in Oppland

Oppland

is a county in Norway, bordering Sør-Trøndelag, Møre og Romsdal, Sogn og Fjordane, Buskerud, Akershus, Oslo and Hedmark. The county administration is in Lillehammer. Oppland is, together with Hedmark, one of the only two landlocked counties of Norway....

 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 Vinstra

Vinstra

Vinstra is the name of both a village and a river in Gudbrandsdalen. The village lies in Nord-Fron municipality in Oppland County, Norway. The administrative centre of Nord-Fron, the population is 2449. The village has rail connections via the Dovre railroad and has a high school. Highway E6...

 River, coming from the southwest, flows into the west side of Olstappen and flows out of Olstappen’s northeast corner, thence east into Gudbrandsdalslågen

Gudbrandsdalslågen

The Gudbrandsdalslågen river flows through the Gudbrandsdal of Norway.The Gudbrandsdalslågen begins in the lake Lesjaskogsvatnet , which lies in Lesja municipality in Oppland. Lesjavatn is the only lake in Norway which has two outlets; they flow into two of Norway’s more famous rivers...

at the town of Vinstra. The Espa River flows into Olstappen from the south, making it a tributary of the Vinstra. Olstappen lies south of the town of Skåbu.