Saltfjellet in the context of "Nordland"

A polar circle is a geographic term for a conditional circular line (arc) referring either to the Arctic Circle or the Antarctic Circle. These are two of the keynote circles of latitude (parallels). On Earth, the Arctic Circle is currently drifting northwards at a speed of about 14.5 m per year and is now at a mean latitude (i.e. without taking into account the astronomical nutation) of 66°33′50.7″ N; the Antarctic Circle is currently drifting southwards at a speed of about 14.5 m per year and is now at a mean latitude of 66°33′50.7″ S. Polar circles are often equated with polar regions of Earth. Due to their inherent climate environment, the bulk of the Arctic Circle, much of which is sea, is sparsely settled whereas this applies to all of Antarctica which is mainly land and sheltered ice shelves.

If Earth had no atmosphere, then both polar circles (arcs) would see at least a day a year when the center of the Sun is continuously above the horizon and at least a day a year when it is always below the horizon – a polar day and a polar night as is the case for longer, within the circles. Up to and including the associated poles (North and South), known geographically as the frigid zones, such duration extends up to half of the year, namely, close to the poles. Instead, atmospheric refraction and the Sun's light reaching the planet as an extended object rather than a point source means that just within each circle the Earth's surface does not experience any proper polar night, 24 hours where the sun does not rise. By these same two factors, just outward of each circle still experiences a polar day (a day in which the sun does not fully set).

Helgeland is the most southerly district in Northern Norway. Generally speaking, Helgeland refers to the part of Nordland county that is located south of the Arctic Circle. It is bordered in the north by the Saltfjellet mountains and Svartisen glacier, which form a natural border with the Salten district. In the south, Helgeland borders Trøndelag county.

The district covers an area of about 18,832 square kilometres (7,271 sq mi), with nearly 79,000 inhabitants. There are four towns in the district: from south to north these are Brønnøysund, Mosjøen, Sandnessjøen, and Mo i Rana.

Salten is a traditional district in Nordland county, Norway. It includes the municipalities of Gildeskål, Bodø, Beiarn, Saltdal, Fauske, Sørfold, Steigen, and Hamarøy. Salten covers an area of about 9,354 square kilometres (3,612 sq mi) and has a population (2016) of about 73,375 people.

The district borders Helgeland in the south (see Saltfjellet), Ofoten in the north, Sweden in the east, and Vestfjorden (and Lofoten) in the west. The geology in Salten is known in Norway for having the country's largest areas with marble. There are many fjords, and mountains often reaching to the sea. The town of Bodø is the main population center of the district, while the town of Fauske is a secondary center.

Lurøy is a municipality in Nordland county, Norway. It is part of the Helgeland traditional region. The administrative centre of the municipality is located on the island of Onøya. Other villages in Lurøy include Aldra, Haugland, Konsvikosen, Lovund, Lurøy, Sleneset / Solværøyene, Stokkvågen, and Tonnes.

The municipality is located on the coast just south of the Arctic Circle, on the western edge of the Saltfjellet mountain range. The Lurøygården (Lurøy Farm) on the island of Lurøya is a more-than-200-year-old renaissance garden with old plants, a pool, and a nearly 20-metre (66 ft) high Copper Beech.