The most uptodate information about vendors, news, and weather for the Colorado Mineral Fossil Fall Show. Check out the show's floor plan and the products that will be sold. The Colorado Mineral Fossil Fall Show starts on 9/6/2019. The Show ends on 9/14/2019. The Show is located at: The Crown Plaza Hotel / Convention Center 15500 E 40th Ave, Denver, Colorado 80239, United States.