2015 Map of Black Star Canyon

About this map

Sierra Peak anchors this corner of the Santa Ana Mountains, marking the convergence of the Orange and Riverside county boundaries. The landscape is defined by deep drainages such as Black Star Canyon and Gypsum Canyon, which flow toward the Santa Ana River corridor in the north and the Santiago Reservoir in the south. The contrast between suburban expansion and protected wilderness is stark, as the residential streets of Yorba Linda and Irvine press against the rugged eastern canyons. Within the Cleveland National Forest, land-use history is recorded through sites like Beeks Place and Tin Mine Canyon. Established trails, including the Weir Canyon Trail, provide access to the interior ridges of Loma Ridge, while remote water sources like Horsetrough Spring and Mustang Spring remain critical features of the backcountry.