At 2910 Damon Ave in the 92109 ZIP code, In-N-Out Burger is one of Pacific Beach's busiest American restaurants. Harry and Esther Snyder opened the original 100-square-foot stand in Baldwin Park, California, on October 22, 1948, building what is considered the state's first drive-through by installing a hand-built two-way speaker box so customers could order from their cars. The company has never franchised or gone public, and today granddaughter Lynsi Snyder leads more than 400 locations across nine states as a privately held, debt-free operation. Beachgoers heading to World Famous for oceanfront dining often loop through the Damon Avenue drive-thru first for shakes on the way. This Pacific Beach outpost, store number 69, sits just east of Mission Bay off the Balboa Avenue exit with both a drive-thru lane and a full indoor dining room. Beef patties are ground from fresh, never-frozen cattle, lettuce is hand-leafed, and Kennebec potatoes grown in Southern California are cut into fries on-site every day. A 99-out-of-100 county health inspection score speaks to the kitchen's tight standards, and the free parking lot helps manage a line that regularly stretches down the block. Late-night hours extending to 1 a.m. on weekdays and 1:30 a.m. on weekends make this one of the few Pacific Beach spots still cooking well after midnight. Visitors looking to pair their Double-Double run with a craft beer often continue south on Mission Boulevard to Bare Back Grill for a relaxed evening. More than 6,600 Google reviews and a 4.6-star rating confirm what regulars already know: the line moves fast and the burgers are worth the wait.