• 5,000 Calories. One Shot to Win BIG •
Participate in the 5K challenge at your local Fat Shack. Share your attempt. Get entered for a chance to win additional prizes!
Think you've got what it takes to conquer the 5K? All January long, we're inviting challengers nationwide to take on 5,000 calories in 15 minutes or less at their local Fat Shack!
Show us what you've got! Post your challenge video, tag Fat Shack, and you'll be entered for a chance to win additional prizes. And here's the best part: You don't have to finish to win!
Check back soon for additional details!
• Solo Challenge – Available Daily until 10 pm •
An abbreviated tour of our menu...
Totalling over 5,000 Calories...
All in 15 minutes or less.
Think you have what it takes to attempt our BRAND NEW eating challenge?
Please reach us at info@fatshack.com if you cannot find an answer to your question.
Our old challenge, 3 Whole Fat Shack sandwiches in 30 minutes or less, will officially be retired once the new 5K Challenge is live.
Competitors that sign up for local qualifying rounds will compete against the clock! While the Challenge is focused on attempting to eat the food in under 15 minutes, qualifying rounds are about finishing Challenge the fastest. The top 8 finishers across all locations will be awarded entry into our 5K Main Event. The Main Event is where they will have the chance to compete against other qualifying winners to race for $5000 in cash prizes.
The only way to enter our 2026 Main Event and have a chance to compete for $5,000 in cash prizes is to complete the Challenge (adhering to all the rules listed in the Official Rules and Waiver) at one of our qualifying race challenges during the month of November held at your local participating Fat Shack.
The Main Event eating competition will be hosted at our Fort Collins, CO location on Saturday January 10th, 2026 at 2PM MT
We will be collecting the contact information for all finishers at all qualifying rounds. If any of the Top 8 finishers cannot attend the Main Event, then we will extend invitations to the next fastest finishers.
Fat Shack 5k Challenge
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