Philmont Scout Ranch is a ranch located in Colfax County, New Mexico, United States, near the village of Cimarron; it covers 140,177 acres (56,728 ha) of wilderness in the Sangre de Cristo Mountains on the east side of the Cimarron Range of the Rocky Mountains. Donated by oil baron Waite Phillips, the ranch is owned and operated by the Boy Scouts of America. It is a National High Adventure Base where crews of Scouts and Venturers take part in backpacking treks and other outdoor activities. By land area, it is one of the largest youth camps in the world. During the 2019 season, between June 8 and August 22, an estimated 24,000 Scouts and adult leaders backpacked through the Ranch's extensive backcountry. That same year 1,302 staff were responsible for the Ranch's summer operations.

Colfax County is a county in the U.S. state of New Mexico. As of the 2020 census, the population was 12,387. Its county seat is Raton. It is south from the Colorado state line. This county was named for Schuyler Colfax (1823–1885), seventeenth Vice President of the United States under U.S. President Ulysses S. Grant.