Santa Catalina Mountains

Mount Lemmon, with a summit elevation of 9,159 feet (2,792 m), is the highest point in the Santa Catalina Mountains. It is located in the Coronado National Forest north of Tucson, Arizona, United States. Mount Lemmon was named for botanist Sara Plummer Lemmon, who trekked to the top of the mountain with her husband and E. O. Stratton, a local rancher, by horse and foot in 1881. Mount Lemmon is also known as Babad Do'ag, or Frog Mountain to the Tohono O'odham.

Mount Lemmon Survey (MLS) is a part of the Catalina Sky Survey with observatory code G96. MLS uses a 1.52 m (60 in) cassegrain reflector telescope (with 10560x10560-pixel camera at the f/1.6 prime focus, for a five square degree field of view) operated by the Steward Observatory at Mount Lemmon Observatory, which is located at 2,791 meters (9,157 ft) in the Santa Catalina Mountains northeast of Tucson, Arizona. It is currently one of the most prolific surveys worldwide, especially for discovering near-Earth objects. MLS ranks among the top discoverers on the Minor Planet Center's discovery chart with a total of more than 50,000 numbered minor planets.

Mount Lemmon Observatory (MLO), also known as the Mount Lemmon Infrared Observatory, is an astronomical observatory located on Mount Lemmon in the Santa Catalina Mountains approximately 28 kilometers (17 mi) northeast of Tucson, Arizona (US). The site in the Coronado National Forest is used with special permission from the U.S. Forest Service by the University of Arizona's Steward Observatory, and contains a number of independently managed telescopes.

Mount Lemmon Air Force Station (ADC ID: M-92, NORAD ID: Z-92) is a closed United States Air Force General Surveillance Radar station. It is located 17.2 miles (27.7 km) north-northeast of Tucson, Arizona. It was closed in 1969.

Mount Lemmon Ski Valley is a recreational ski area in the U.S. state of Arizona, and the southernmost ski destination in the continental United States. Mount Lemmon Ski Valley is located on the slopes of Mount Lemmon in the Santa Catalina Mountains just north of Tucson, Arizona. It is part of the Coronado National Forest, located near the mountaintop village of Summerhaven. The summit is 9,157 feet (2,791 m) above sea level, and receives approximately 180 inches (4.6 m) of snow annually. Winter storms on Mount Lemmon are frequent, leaving untouched powder areas. The ski season on Mount Lemmon usually occurs between mid-December and April. The weather is usually mild enough to ski in a sweater and denim jeans, with temperatures ranging from 20 to 50 °F (−7 to 10 °C). There is no grooming at Mount Lemmon, which makes even the mild terrain challenging. Ski Valley is accessible via the Catalina Highway. Parking is limited at the ski area. The ski area is regularly closed some weekdays even when they have snow, but the specific days of closure vary. The highway is frequently closed for a day or so following substantial snowfalls until plows can clear the road. On April 12, 1973, Mount Lemmon received record snowfall totaling 26 inches. Restrictions limiting travel to vehicles with chains or four-wheel-drive above certain elevations may also be in effect during these times.The "back" road to Mount Lemmon from the town of Oracle, Arizona, is dirt and is closed from December through March, and so provides no access during the ski season. The ski lift runs year round, as a "Sky Ride" experience in the summertime, offering views of the Ski Valley area, forest and grass-covered slopes, and the long distance vistas of the mountains and valleys in the distance north of the Santa Catalinas.The Ski Valley is on United States Forest Service land, but is operated as a private concession by permit with the Forest Service.

The Aspen Fire burned from June 17, 2003, for about a month on Mount Lemmon, part of the Santa Catalina Mountains located in the Coronado National Forest north of Tucson, Arizona, and in the surrounding area. It burned 84,750 acres (343.0 km2) (132.4 sq mi) of land, and destroyed 340 homes and businesses of the town of Summerhaven. Damages to electric lines, phone lines, water facilities, streets and sewers totaled $4.1 million. Firefighting cost was about $17 million, and the Forest Service is spending $2.7 million to prevent soil loss. In 2002, the year before the fire started, Congress had been requested to allocate about $2 million to cover the implementation of fire prevention measures in the Coronado National Forest. However, that allocation was reduced to about $150,000 in the Congressional budget process. There were originally suspicions that the fire was caused by a lightning strike, but it was eventually determined to be human-caused.

Summerhaven is a small unincorporated community and census-designated place (CDP) on Mount Lemmon in the Santa Catalina Mountains north of Tucson in Pima County, Arizona, United States. As of the 2010 census it had a permanent population of 40. Summerhaven sits at an elevation of approximately 7,600 to 8,200 feet (2,300 to 2,500 m) above sea level. Summerhaven is accessed via the Catalina Highway from suburban northeast Tucson, and it is about 24.5 miles (39.4 km) from the base of the mountains to Summerhaven.

Soldier Camp is a populated place situated in Pima County, Arizona, United States. It is located along the Catalina Highway in the Coronado National Forest. It has an estimated elevation of 7,720 feet (2,350 m) above sea level. Soldier Camp is a community of USFS Recreation Residences.

Catalina Sky Survey (CSS; obs. code: 703) is an astronomical survey to discover comets and asteroids. It is conducted at the Steward Observatory's Catalina Station, located near Tucson, Arizona, in the United States. CSS focuses on the search for near-Earth objects, in particular on any potentially hazardous asteroid that may pose a threat of impact. Its counterpart in the southern hemisphere was the Siding Spring Survey (SSS), closed in 2013 due to loss of funding. CSS supersedes the photographic Bigelow Sky Survey.

Catalina Station (CS), also known as Steward Observatory Catalina Station, is an astronomical observing facility located on Mount Bigelow in the Santa Catalina Mountains approximately 29 kilometers (18 mi) northeast of Tucson, Arizona. The site in the Coronado National Forest is used with special permission from the United States Forest Service (USFS) by the Steward Observatory of the University of Arizona.

KXCI (91.3 MHz) is a non-commercial, listener-supported, FM radio station in Tucson, Arizona. It is owned by the non-profit Foundation for Creative Broadcasting. Its call sign comes from the Roman numeral for 91 (XCI). The studios and offices are on South 4th Avenue. Its transmitter is on East Mount Bigelow Road in Whitetail, Arizona.Primarily a music station, its programming also includes short-form features about local issues and the syndicated political show "Democracy Now!" on weekdays. There are also programs on native people, the LGBTQ community and the Latino community. KXCI plays a variety of musical genres, featuring both independent artists and bands/musicians on major labels. They include alternative, progressive country, Americana, blues, jazz, Latin jazz, cumbia, reggaeton, punk rock and folk.

KUAT-FM is a radio station in Tucson, Arizona, United States. One of two radio services operated by the University of Arizona (UA) through its Arizona Public Media arm, it broadcasts a classical format throughout Southern Arizona. Studios are in the Modern Languages Building on the UA campus.