Explorers Jacques Marquette and Louis Jolliet began their journey to map the Mississippi River on May 17th, 1673. The trip started on Lake Michigan. The explorers traveled down the Wisconsin River to reach the Mississippi a month later, near the modern towns of Prairie du Chien, Wisconsin, and Marquette, Iowa.
Marquette and Jolliet passed present-day Kentucky on their trek down the Mississippi. The first Kentucky Derby was run on this day in 1875 — not the first Saturday in May, or even a Saturday at all (it was a Monday). The winning horse was Aristides.
Secretariat set the record for the fastest time at the Kentucky Derby in 1973. “Secretariat” made regular appearances on a late-night talk show (okay, it was two guys in a horse costume) on “The Late Late Show with Craig Ferguson.” Scottish comedian Ferguson was born May 17th, 1962. Before getting the hosting job on “The Late Late Show,” Ferguson played Drew’s boss on “The Drew Carey Show.”
And May 17th is the birthday of an actor famous for roles in movies about a river journey (“Apocalypse Now”) and a motorcycle trek (“Easy Rider”) — Dennis Hopper (born 1936).