One Twenty-Three Burger Co.

One Twenty-Three Burger Co. in Upland, CA keeps things focused on one mission: great burgers done right. After starting as a BBQ trailer, the concept shifted to something faster and more focused, led by an owner who has always been a burger enthusiast. The result is a menu built around 100 percent American Wagyu burgers, never frozen and cooked with house seasonings and house sauces that give every order its own personality.

Guests quickly notice the quality and creativity that set this trailer apart. The lineup features American Wagyu burgers, crispy fries, and loaded favorites like bulgogi fries with cheddar jack, ground beef bulgogi, spicy mayo, green onion, and toasted sesame seeds. Chili cheese fries and other craveable sides keep the menu fun while giving burger fans plenty of reasons to return for another round.

One Twenty-Three Burger Co. brings big flavor and easygoing energy to events throughout the Upland area. With premium ingredients, carefully crafted sauces, and a passion for burgers that shows in every order, this trailer turns simple comfort food into something people talk about long after the last fry is gone.