The meridian 105° west of Greenwich is a line of longitude that extends from the

North Pole The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. It is called the True North Pole to distinguish from the Magn ...

across the

Arctic Ocean The Arctic Ocean is the smallest and shallowest of the world's five major oceans. It spans an area of approximately and is known as the coldest of all the oceans. The International Hydrographic Organization (IHO) recognizes it as an ocean, a ...

, North America, the Pacific Ocean, the Southern Ocean, and

Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest contine ...

to the South Pole. The 105th meridian west forms a

great circle In mathematics, a great circle or orthodrome is the circular intersection of a sphere and a plane passing through the sphere's center point. Any arc of a great circle is a geodesic of the sphere, so that great circles in spherical geometry ...

with the 75th meridian east. It serves as the reference

meridian Meridian or a meridian line (from Latin ''meridies'' via Old French ''meridiane'', meaning “midday”) may refer to Science * Meridian (astronomy), imaginary circle in a plane perpendicular to the planes of the celestial equator and horizon * ...

for the seventh time zone west of Greenwich, known as UTC-07 or the Mountain Time Zone in North America. In the United States, Interstate Highway I-25 roughly parallels the meridian from

Douglas, Wyoming Douglas is a city in Converse County, Wyoming, United States. The population was 6,120 at the 2010 census. It is the county seat of Converse County and the home of the Wyoming State Fair. History Douglas was platted in 1886 when the Wyoming ...

to Las Vegas, New Mexico, and from

Wellington, Colorado Wellington is a statutory town in Larimer County, Colorado, United States. The population was 11,047 at the 2020 census. Geography Wellington is located at (40.702324, -105.005497). According to the United States Census Bureau, the town ha ...

to the Prospect Road interchange (in Fort Collins, Colorado), I-25 happens to be almost exactly aligned along the 105th meridian west. The meridian bisects Denver, Colorado, passing through Denver Union Station. Throughout the Denver metro area, Kalamath Street is the road that most closely corresponds to the 105th meridian.

From Pole to Pole

Starting at the

and heading south to the South Pole, the 105th meridian west passes through: :

From Pole to Pole

See also