The Imperial Sand Dunes — also known as the Algodones Dunes — are the largest mass of sand dunes in California, formed from windblown sands of ancient Lake Cahuilla in the state's southeastern corner. The dune system extends more than 40 miles in a band averaging about 5 miles wide, with dunes often reaching 300 feet above the desert floor. Managed by the Bureau of Land Management, it sits east of Brawley and is reached via Interstate 8 west of Yuma, Arizona.
Best season — Fall through spring (cooler desert temperatures)
At a glance
The facts worth checking before you roll out
Conservative, source-minded facts for planning your visit — always worth confirming against current conditions before you travel.
State
California
Managing agency
Bureau of Land Management (BLM)
Extent
40+ miles, band averaging ~5 miles wide
Dune height
Often up to ~300 feet above the desert floor
Permit window
Required Oct 1 – Apr 15 (per BLM)
On the ground
Formed from the windblown sands of ancient Lake Cahuilla, the Algodones Dunes are the largest dune mass in California, sweeping more than 40 miles across the southeastern desert.
Within the larger area, the North Algodones Dunes Wilderness offers a quieter, vehicle-free alternative — open to hiking and horseback riding across more than 26,000 acres of remote dunes.
Recreation permit fees and seasonal permit requirements apply, and access rules vary between open, limited, and closed areas; confirm current permits, fees, and conditions on the Bureau of Land Management site before you go.
Official sources
- Bureau of Land Management — Imperial Sand Dunes, California Bureau of Land Management
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