The National Park Service says nearly 4,000 marijuana plants have been removed from park service land, in the Santa Monica Mountains National Recreation area.
The plants were off of Kanan Dume Road, north of Malibu.
Park Service officials say it was a sophisticated operation, and they think it was the work of a Mexican drug trafficking operation.
There was a campsite, an irrigation system, fertilizer, and even traps to catch rodents which might damage the crop.
The area was so remote that park rangers, and Los Angeles County Sheriff’s deputies had to use helicopters to remove two tons of plants, and garbage from the operation.
No arrests were made in connection with the raid.