Mexican cartels running pot farms in U.S. national forest

Beyond the towering trees that have stood here for thousands of years, an intense drug war is being waged.

Authorities uncovered more than $1 billion worth of pot plants in Sequoia National Forest this week.

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Illegal immigrants connected to Mexico's drug cartels are growing hundreds of millions of dollars worth of marijuana in the heart of one of America's national treasures, authorities say. It's a booming business that, federal officials say, feeds Mexico's most violent drug traffickers.

"These aren't Cheech and Chong plants," said John Walters, director of the National Drug Control Policy. "People who farm now are not doing this for laughs, despite the fact Hollywood still thinks that. They're doing it to make a lot of money."

Walters spoke from a "marijuana garden" tucked deep into the Sequoia National Forest, a two- to four-hour hike from the nearest road, far removed from the giant sequoias the region is best known for. Watch Hollywood needs to chill out, get serious about pot »

Ten thousand marijuana plants, some 5 feet tall, dotted the mountainside's steep terrain amid thick brush, often near streams. This garden's street value is an estimated $40 million, authorities said.

Walters clutched three plants he said were worth $12,000 on the streets.

"This is about serious criminal organizations," Walters said. "They're willing to kill anybody who gets in their way. They're taking money back to those who kill prosecutors, judges and law enforcement." See photos of pot farm sweep in heart of U.S. national treasure »

Over the past eight days, a federal, state and county law enforcement initiative called Operation LOCCUST has eradicated 420,000 marijuana plants here worth more than $1 billion on the street. By comparison, authorities eradicated 330,000 plants over the six-month growing season last month, said Lt. Mike Boudreaux of the Tulare County Sheriff's Department.