Big Bear Lake doesn’t have an In-N-Out Burger drive-thru, but this weekend the fast food chain has a huge presence in the San Bernardino Mountains community, and they’re not all there to make Double-Doubles.

Bear Mountain Ski Resort is the site of the In-N-Out Burger Tough Mudder Challenge, which started at 8 a.m. Friday, Sept. 5 and runs through Sunday, Sept. 7.

The event is a fundraiser for Slave 2 Nothing, an organization founded by In-N-Out owner and president Lynsi Snyder-Ellingson and her husband Sean Ellingson. Its mission is to combat substance abuse and human trafficking.

In-N-Out Burger Tough Mudder Challenge features obstacles inspired by their brand as competitors crawl through a potato sack on Friday, Sept. 5, 2025, at Bear Mountain. The event continues throughout the weeke

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