On July 30, 1989, at the Cheyenne Frontier Days Rodeo in Cheyenne, Wyoming, after completing a successful 85-point ride on a Brahma bull named Takin' Care of Business, Frost dismounted and landed in the dirt. The bull turned and hit him in the back with his horn (although he was not gored), breaking several of his ribs. He initially rose to his feet, waving at Tuff Hedeman for help. As he took a couple of steps, he fell to the ground, causing his heart and lungs to be punctured by the broken ribs. He was rushed to Memorial Hospital where he was pronounced dead. He was 25 years old. No autopsy was performed. He posthumously finished third in the event.
"Cheyenne 1989 - The Last Ride". Lane Frost. Archived from the original on October 27, 2016. Retrieved February 18, 2020.