Lane Clyde Frost (October 12, 1963 – July 30, 1989), born in La Junta, Colorado, was an American professional rodeo cowboy who specialized in bull riding, and competed in the Professional Rodeo Cowboys Association (PRCA). He was the 1987 PRCA World Champion bull rider. He was also the only rider ever to score a qualified ride on Red Rock, the 1987 PRCA Bucking Bull of the Year.
Frost started riding dairy calves around age 5–6. His first rodeo awards were won when he was 10, at the "Little Buckaroos" Rodeos, held in Uintah Basin: first in bareback, second in calf roping, and third in the "bull riding" (calf riding) event. He also competed in wrestling in junior high school. The family then moved to Oklahoma and he attended Atoka High School in Atoka. In Oklahoma, he was the National High School Bull Riding Champion in 1981. He was the Bull Riding Champion of the first Youth National Finals in Fort Worth, Texas, in 1982. On January 5, 1985, Frost married Kellie Kyle (born 1965), a barrel racer from Quanah, Texas.
Frost joined the PRCA and began riding full-time after graduating from high school in 1982. In 1984, he qualified for his first National Finals Rodeo (NFR). In 1986, he won the NFR bull riding average title. In 1987, he became the PRCA World Champion bull rider at the NFR at age 24. He went on to compete at the Rodeo '88 Challenge Cup held as part of the Cultural Olympiad in association with the 1988 Winter Olympics in Calgary. In his lifetime, Frost made it to the NFR for five consecutive years from 1984 to 1988.
In 1988, John Growney created a special competition between the two 1987 Champions, Red Rock and Lane Frost. The bull had never been successfully ridden during his four-year professional career, despite rodeo cowboys making 309 attempts to ride him. It was decided the two would have seven showdowns at different rodeos in states across the West. The event was titled the "Challenge of the Champions." Red Rock was brought out of retirement and Frost rode him to the eight-second whistle for a scoring ride for four of the seven matches.
On July 30, 1989, at Cheyenne Frontier Days 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 mud. The bull then turned, knocked Frost over, pressed his right horn on Frost's back, and pushed him against the muddy arena floor. Frost initially rose to his feet, took a couple of steps, waved for help, and then fell to the ground.
After Frost's death, Cody Lambert, another one of his friends and traveling partners, created the protective vest that professional cowboys now wear when riding bulls. Later, in 1996, the Professional Bull Riders (PBR) made protective vests mandatory, and subsequently all bull riding organizations did as well.