Dennis the Cat Day
Sun, May 24
|Old Idaho Penitentiary
Join the Old Idaho Penitentiary on a Summer Saturday afternoon and discover the story of the Penitentiary’s historic animal mascot, Dennis the black and white tuxedo cat, during our fifth annual Dennis the Cat Day
Time & Location
May 24, 2026, 12:00 PM – 5:00 PM
Old Idaho Penitentiary, 2445 Old Penitentiary Rd, Boise, ID 83712, USA
About the Event
Register Here: https://store.history.idaho.gov/Performance.aspxpid=31197&cal=https%3a%2f%2fstore.history.idaho.gov%3a443%2fCalendar.aspx
Activities include Prison Pets history presentations, Prison Paws scavenger hunt, games (such as Pin the Tail on Dennis), and more! Music, food trucks, local pet supply vendors, new Dennis merchandise, and more will be available! Registration also available at the door! Be sure to bring donations of unopened pet food for admission to the Prison Pets history presentations! Donations benefit the Idaho Humane Society and Simply Cats. Presentations take place at 12:30, 1:30, 2:30, and 3:30 pm.
Idaho State Historical Society Members receive free admission to this event! Learn more and become a Member at history.idaho.gov/membership. Members must bring pet food donations for presentations.