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Old Montana Prison August Gun Show
Sat, Aug 22
|PEN Convention Center
Join us for the OMP August Gun Show at the Pen Convention Center
Time & Location
Aug 22, 2026, 9:00 AM – 6:00 PM
PEN Convention Center, 925 Main St, Deer Lodge, MT 59722, USA
About the event
Step back into the Old West and join us for the Old Montana Prison Gun Show at the Pen Convention Center in historic Deer Lodge, Montana. Spend the weekend exploring tables filled with firearms, ammunition, knives, survival gear, accessories, collectibles, and much more from vendors across the region.
Whether you're an avid collector, outdoor enthusiast, hunter, or simply enjoy Montana history and western heritage, the Old Montana Prison Gun Show offers something for everyone.
Event Schedule
Friday, August 21 — 12:00 p.m. to 6:00 p.m.
Saturday, August 22 — 9:00 a.m. to 6:00 p.m.
Sunday, August 23 — 9:00 a.m. to 2:00 p.m.