On March 26, 1872, at 2:30 am, Lone Pine experienced a violent earthquake that destroyed most of the town. At the time, the town consisted of 80 buildings made of mud and adobe; only 20 structures were left standing. As a result of the quake, which formed Diaz Lake, a total of 26 people lost their lives. A mass grave located just north of town commemorates the site of the main fault. One of the few remaining structures pre-dating the earthquake is the 21-inch-thick "Old Adobe Wall" located in the alley behind the Lone Star Bistro, a coffee house.