Blue Ridge

Blue Ridge may refer to any of the following:

Places

In the United States:

In Canada:

Other

Blue

Blue is the colour between violet and green on the optical spectrum of visible light. Human eyes perceive blue when observing light with a wavelength between 450 and 495 nanometres. Blues with a higher frequency and thus a shorter wavelength gradually look more violet, while those with a lower frequency and a longer wavelength gradually appear more green. Pure blue, in the middle, has a wavelength of 470 nanometres. In painting and traditional colour theory, blue is one of the three primary colours of pigments, along with red and yellow, which can be mixed to form a wide gamut of colours. Red and blue mixed together form violet, blue and yellow together form green. Blue is also a primary colour in the RGB colour model, used to create all the colours on the screen of a television or computer monitor.

The modern English word blue comes from Middle English bleu or blewe, from the Old French bleu, a word of Germanic origin, related to the Old High German word blao. The clear sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. When sunlight passes through the atmosphere, the blue wavelengths are scattered more widely by the oxygen and nitrogen molecules, and more blue comes to our eyes. Rayleigh scattering also explains blue eyes; there is no blue pigment in blue eyes. Distant objects appear more blue because of another optical effect called atmospheric perspective.

Ridge

A ridge or mountain ridge is a geological feature consisting of a chain of mountains or hills that form a continuous elevated crest for some distance. Ridges are usually termed hills or mountains as well, depending on size. There are several main types of ridges:-

Blue Ridge Mountain

Blue Ridge Mountain, also known as Blue Mountain, is the colloquial name of the westernmost ridge of the Blue Ridge Mountains in northern Virginia and the Eastern Panhandle of West Virginia. The Appalachian Trail traverses the entire length of the mountain along its western slope and crest.

Geography

The mountain extends from the Potomac River in the north to Chester Gap in the south. Along this section of the Blue Ridge Mountains, Blue Ridge Mountain comprises the sole ridge of the chain in the immediate vicinity and contains few spur ridges or peaks. The notable exceptions are the Bull Run and Catoctin mountains, which lie approximately 20 miles (32 km) to the east across the Loudoun Valley, and Short Hill Mountain, located 4 miles (6 km) to the east, which runs parallel to the Blue Ridge for 12 miles (19 km) near its northern terminus. To the west of the mountain is the lower Shenandoah Valley.

Blue Ridge Mountain is noticeably lower in elevation than other sections of the Blue Ridge Mountains in Virginia. The southern section of the mountain contains the highest peaks, and the ridge gradually loses elevation as it gets closer to the Potomac. Elevations in the gaps are typically around 1,000 feet (300 m), while peaks range from 1,200 feet (370 m) to 2,300 feet (700 m). Across the Potomac the ridge continues as Elk Ridge in Maryland.

Blue Ridge Parkway

The Blue Ridge Parkway is a National Parkway and All-American Road in the United States, noted for its scenic beauty. The parkway, which is America's longest linear park, runs for 469 miles (755 km) through 29 Virginia and North Carolina counties, mostly along the Blue Ridge, a major mountain chain that is part of the Appalachian Mountains. Its southern terminus is on the boundary between Great Smoky Mountains National Park and the Cherokee Indian Reservation in North Carolina, from which it travels north to Shenandoah National Park in Virginia and offers access to the Skyline Drive. While the two roads join together end-to-end, they are separate and distinct entities, built as two different projects and managed by two different National Park Service units. The Blue Ridge Parkway was built to connect Shenandoah National Park to the Great Smoky Mountains National Park.

The parkway, while not a National Park, has been the most visited unit of the National Park System every year since 1946 except two (1949, 2013). Land on either side of the road is owned and maintained by the National Park Service and, in many places, parkway land is bordered by United States Forest Service property. The parkway is on North Carolina's version of the America the Beautiful quarter in 2015.