The World's Shortest St. Patrick's Day ZERO-K is a lighthearted endurance event held in Hot Springs National Park, where participants sprint, stroll, or saunter a short distance down Historic Bridge Street, starting at OKelley’s Pub. The event celebrates St. Patrick’s Day with friends and family and includes festive activities such as a costume contest. Entry includes a t-shirt, finisher's medal, swag bag, and race bib. The event supports Tri-Lakes CASA, which advocates for foster children in the community, and it is held in conjunction with the World's Shortest St. Patrick's Day Parade.