Albuquerque is the most populous city in the U.S. state of New Mexico. Albuquerque lies within the northern, upper edges of the Chihuahuan Desert ecoregion, based on long-term patterns of climate, associations of plants and wildlife, and landforms, including drainage patterns. It is a high-altitude city and serves as the county seat of Bernalillo County, and it is situated in the central part of the state, straddling the Rio Grande. Albuquerque has a well-developed bicycle network. In and around the City there are trails, bike routes, and paths that provide the residents and visitors with alternatives to motorized travel. The city was recently reviewed as having a major up and coming bike scene in North America. A 2011 study by Walk Score ranked Albuquerque 28th most walkable of the fifty largest U.S. cities.
Northwest Quadrant and Southwest Quadrant are located in Albuquerque West. Northwest Quadrant contains historic Old Town Albuquerque. The area has a mixture of commercial districts and low- to middle-income neighborhoods. Northwest Albuquerque includes the largest section of downtown, Rio Grande Nature Center State Park and the Bosque. Additionally, the “North Valley” area, which has some expensive homes and small ranches along the Rio Grande, is located here. The city of Albuquerque engulfs the village of Los Ranchos de Albuquerque and borders Corrales in the North Valley. The rapidly developing area on the west side of the river is known as the “West Mesa” or “Westside” and consists primarily of traditional residential subdivisions.
Southwest Quadrant is often referred to as the “South Valley.” Although the city limits of Albuquerque do not include all of the area, the South Valley is considered to extend all the way to the Isleta Indian Reservation. This includes the old communities of Atrisco, Los Padillas, Kinney, Westgate, Westside, Mountainview, and Pajarito. The south end of downtown Albuquerque, the Bosque (“woodlands”), the Barelas neighborhood, the National Hispanic Cultural Center, and the Albuquerque Biological Park are also located here.