Discover the World's Greatest Heavyweight Boxer of the 20th Century! Jack Dempsey, aka "The Manassa Mauler," was the world's heavyweight boxing champion from 1919 to 1926.  OPEN: Holidays, Friday, Saturday, Sunday 11-5 pm or later if called ahead, 719-843-5207.

General Information: Hours of Operation: Open weekend of Memorial Day through Labor Day. Hours are 10:00am-5:00pm. We're open Tuesday-Saturday in June and August, and Monday-Saturday in July., Seasons of Operation: Summer