Pajarito Mountain Ski Area is located on the north face of Pajarito Mountain, one of the Jemez Mountains in north central New Mexico, west of Los Alamos. It is located on of privately owned land. Pajarito Mountain is owned and operated by volunteers and Mountain Capital Partners. A typical season runs from Christmas to early April, but an outstanding season may run from Thanksgiving to late April. Pajarito now has a snowmaking system and it is producing snow. Season passes are available with discounts available for early season purchase. In summer, Pajarito hosts numerous special events, many involving mountain biking. An extensive network of single and double trackmountain bike trails criss-cross the mountain, including a new singletrack trail going to the summit. Pajarito hosts lift access downhill and freeride mountain biking off the Spruce chair, and has continued to do so after the Las Conchas Fire in 2011. There also are hiking trails, and horse riding is permitted everywhere except on the mountain bike trails. Adjacent to Pajarito is a Los Alamos County campground, Camp May; Santa Fe National Forest; and Valles Caldera National Preserve.
Pajarito Mountain first opened on 23 November 1957 with no toilets, no water, no grooming, no modern lifts and a few short slopes. The Aspen run received a T-bar for the 1962-1963 season. An additional of land was purchased in the late 1960s and the first chairlift installed on the Spruce run for the 1969-1970 season. A similar two person chairlift was installed on the Big Mother run for the 1976-1977 season. A beginners lift was installed, to replace a rope tow, for the 1981-1982 season, and a triple chairlift replaced the T-bar for the following 1982-1983 season. Construction of the new Ski Lodge began in the summer of 1987 and was finished for the 1988-1989 season. A quad chairlift was completed in 1994 for the Townsight run. In the summer of 2011, the Las Conchas Fire burned a portion of the ski area. The fire burned ten of the mountain's 44 runs, and damaged two chairlifts. The most significant damage occurred on the mountain's east side, in the Townsight area. Despite fire damage, Pajarito Mountain opened for the 2011-2012 season with four lifts operating and 34 runs open.