The preserve is located on a major fault line, which forces groundwater to the surface and creates the rare marshy environment.
It is one of the ten largest cottonwood-willow riparian habitats remaining in California.
Over 250 species of birds have been documented within the preserve boundaries.
The site contains the transition zone where the high-altitude Mojave Desert meets the lower-altitude Colorado Desert.
Rare species such as the desert tortoise and bighorn sheep are occasionally spotted within the canyon.
The boardwalk was specifically engineered to protect the sensitive marsh ecosystem from soil compaction and erosion.
Big Morongo Canyon Preserve is an expansive desert oasis situated at the intersection of the Mojave and Colorado Deserts. It functions as a critical riparian habitat supported by the year-round flow of Big Morongo Creek. The preserve spans over 31,000 acres and serves as a vital corridor for migratory birds traveling along the Pacific Flyway. Visitors can traverse a network of trails, including the elevated boardwalk that crosses the marshy wetlands. The site is a designated Important Bird Area (IBA) due to the high density of avian species, including vermilion flycatchers and least Bell's vireos. The geology features dramatic transitions from rugged canyon walls to lush, tree-lined creek beds. It is managed through a cooperative partnership between the Bureau of Land Management and local conservation groups.
The elevated boardwalk overlooking the lush marshlands during the golden hour.
Bring binoculars, as the preserve is world-renowned for its birdwatching opportunities.
Carry significantly more water than you expect to drink, as the desert heat can cause rapid dehydration even on short hikes.
Check for ticks and wear long pants, especially if venturing off the boardwalk into the tall grasses.
Do not attempt to hike the canyon floor during the peak heat of summer afternoons, as temperatures can reach dangerous extremes.
Open daily from sunrise to sunset.
Stay on marked trails and boardwalks; pack out all trash; no pets, bicycles, or motorized vehicles are permitted inside the preserve.
