Bommer Canyon is an open space preserve in southern Irvine, California featuring hiking and biking trails as well as private event areas.
[7] The trails in Bommer Canyon feature groves of oak and sycamore trees as well as rough rock outcrops and are popular with area residents who use them for nature walks, hiking and mountain biking.
[3][8] In 1837, José Antonio Andrés Sepúlveda established Rancho San Joaquin, including the entire area now known as Bommer Canyon.
[7] In 1996, roughly 50,000 acres (20,000 ha) of preserved land on Irvine Ranch, including Bommer Canyon, were designated as a National Natural Landmark—the first such landmark for California since 1987.
[11] The trailhead opening included an official ribbon-cutting ceremony with the mayor of Irvine, Sukhee Kang, and city council members, followed by an Earth Day hike through the preserve.
[3] The City of Irvine currently permits area residents to rent the former cattle operations part of the canyon for campouts and other special events.