The Kelvin Grade massacre was an incident that occurred on November 2, 1889 when a group of nine imprisoned Apache escaped from police custody during a prisoner transfer near the town of Globe, Arizona. The escape resulted in the deaths of two sheriffs and triggered one of the largest manhunts in Arizona history. Veterans of the Apache Wars scoured the Arizona frontier for nearly a year in search of the fugitives, by the end of which all were caught or killed except for the famous Indian scout known as the Apache Kid.

Haskay-bay-nay-ntayl, better known as the Apache Kid, was born in Aravaipa Canyon, 25 miles south of San Carlos Agency, into one of the three local groups of the Aravaipa/Arivaipa Apache Band of San Carlos Apache, one subgroup of the Western Apache people. As a member of what the U.S. government called the "SI band", Kid developed important skills and became a famous and respected scout and later a notorious renegade active in the borderlands of the U.S. states of Arizona and New Mexico in the late 19th and possibly the early 20th centuries.