The Jack Dempsey Days Boxing Festival is a one-day Pro-Am boxing event in Cripple Creek, Colorado, where William Harrison “Kid Blackie” Dempsey first fought under the name Jack Dempsey.

The afternoon features amateur bouts honoring Dempsey’s early “Kid Blackie” days — symbolizing the humble beginnings and fighting spirit of all developing boxers. The evening transitions into the pro card, titled “Kid Blackie No More,” marking the moment Dempsey became the fighter the world would remember — and reflecting the transformation many athletes make from amateurs to professionals today.

Hosted by the Kid Blackie Boxing Club, the festival celebrates boxing’s heritage, community, and the enduring path from the mines to the main event.