Usually held in October. This is one of Montana's signature events. Next year's dates aren't posted yet; this page shows the last one.
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The Monster Mash is a weekend barrel race held at Cottonwood Equine Center in Joliet, Montana, with classes split by age group and prizes paid on fastest average over the weekend.
Pre-entry runs September 17 through October 21, 2026. A W-9 form is required to receive prize payouts.
Listed from Visit Montana
