The Colorado Collectors Forum Fall Showcase wraps its two-day run at the Marriott Denver South in Lone Tree on Sunday, September 27, 2026, with roughly 225 dealer tables filling the hotel's ballroom space. The Collectors Forum is one of Colorado's longest-running and most respected show operations, and its events draw a particular kind of dealer — established shops, serious private collectors, and vintage specialists rather than the pop-up modern-wax crowd. If you collect anything older than 1990, this is a show worth marking on the calendar, and Sunday is when its inventory becomes most negotiable.
The floor skews toward depth over volume. Sports card dealers cover MLB, NBA, NFL, NHL, UFC, boxing, and soccer with genuine vintage strength: 1950s and 1960s Topps and Bowman, 1970s and 1980s Topps, Fleer, and Donruss in quantity, plus pre-war material at some tables. Modern inventory is present too — Panini Prizm, National Treasures, Donruss Optic, Select, Topps Chrome, and Bowman Draft — but the Forum's reputation rests on the older cases. Colorado Rockies, Denver Broncos, Denver Nuggets, and Colorado Avalanche collectors will find dedicated inventory, and late September timing catches the NFL season in full swing and the baseball postseason race. Trading card game tables carry Pokemon from vintage Wizards of the Coast through Scarlet and Violet and Japanese sets, Magic: The Gathering including Reserved List and Commander staples, Yu-Gi-Oh!, One Piece, Disney Lorcana, and Dragon Ball Z. Locked cases display PSA, BGS, SGC, and CGC graded slabs, with autographed memorabilia, comics, and supplies rounding out the room.
Sunday hours run 10:00 AM to 4:00 PM Mountain Time — a compact six-hour window, so arriving after noon costs you a meaningful share of the day. Admission is free, and children are welcome at no charge, which is notable for a show with this dealer caliber.
The Marriott Denver South sits at Park Meadows in Lone Tree, directly accessible from I-25 and C-470 in the south metro, with free on-site hotel parking. The ballroom is ground-level and ADA-accessible, and hotel dining is available on site. For collectors in Lone Tree, Highlands Ranch, Centennial, Parker, Castle Rock, and Littleton, it is by far the most convenient serious show of the fall.
This showcase suits vintage collectors, set builders, and buyers who value dealer expertise over sheer table count. The Forum's dealers tend to know their material well, which makes them good sources of information as much as inventory — worth remembering if you are trying to understand what a raw vintage card might grade at. Sunday specifically favors negotiators, sellers looking to place a collection with established buyers, and families who prefer a calmer floor.
To use the day well, arrive at 10:00 AM and revisit anything you flagged Saturday with a specific number in mind. Bring cash, which carries real weight with vintage dealers, plus a want list organized by set and year. Pack penny sleeves, top loaders, and a box. The final ninety minutes, roughly 2:30 PM onward, is when pricing loosens most. Check the Colorado Collectors Forum's listings and Colorado hobby groups on Facebook for the confirmed dealer roster before you go.