half mile of hell
n.— «He competed in the pony chuckwagon and chariot races that are a staple of small town rodeos.…The race itself, around an oval field—affectionately known as the “half mile of hell”—is just as fast and still dangerous.» —“A cowboy’s spine” by Brian Bergman Maclean’s (Can.) July 6, 2005. (source: Double-Tongued Dictionary)