The reservoir was built by early cattlemen in 1900 and later raised by Bill Keys in 1949 to increase water storage capacity.
The dam is constructed of masonry and concrete, designed to capture runoff from the nearby Wonderland of Rocks.
The site contains ancient petroglyphs, though some rock art at the location was historically vandalized by film crews using chalk to highlight images.
It is one of the few places in the park where water persists long enough to support riparian vegetation like cottonwoods and willows.
The reservoir is a primary water source for local wildlife, including desert bighorn sheep and various bird species.
Barker Dam is a 1.1-mile loop trail located within Joshua Tree National Park featuring a historic concrete reservoir built by early cattle ranchers. Constructed by C.O. Barker and Bill Keys in the early 20th century, the dam was designed to capture scarce rainwater for livestock. The reservoir typically holds water seasonally, creating a rare desert wetland that attracts migratory birds and bighorn sheep. The surrounding terrain consists of massive monzogranite boulders and native Mojave desert vegetation. Indigenous rock art is visible on the rock faces near the trail loop. The trail is relatively flat with minimal elevation gain, making it accessible to most hikers. The area provides a stark contrast between the arid desert landscape and the riparian habitat created by the catchment. Visitors can observe the structural remains of the original masonry wall, which has been modified over the decades.
The north side of the reservoir, where the still water reflects the surrounding monoliths and desert sky.
Bring binoculars to scan the rocky hillsides for bighorn sheep, which often descend to the dam to drink.
Stay on the marked path to protect fragile desert biological soil crusts and avoid disturbing rock art sites.
Carry at least one gallon of water per person, as the desert climate remains dehydrating even on short trails.
Do not attempt this hike during midday in the summer months when temperatures frequently exceed 100°F.
Practice Leave No Trace principles; do not climb on or touch petroglyphs, and keep noise levels low to avoid startling wildlife.
