Investigators in northern Lassen County have pulled off one of the region's largest illegal marijuana busts in recent memory, eradicating roughly 151,177 plants and nearly 20,000 pounds of processed cannabis across 47 separate parcels. Sheriff John McGarva told the Board of Supervisors the haul carries an estimated street value of about $10 million.
The Lassen County Sheriff's Office, working alongside Lassen County Code Enforcement, uncovered the sprawling operation. Personnel flew over suspected cultivation sites and determined marijuana was actively being grown at several of them, none of which were licensed by the state of California or Lassen County. Search warrants were executed at all 47 parcels starting on August 17, with the operation described by Lassen News as unfolding in two phases, the weeks of August 17-21 and September 7-11.
Beyond the plants and processed product, investigators found thousands of pounds of garbage littering the cultivation sites, along with dangerous pesticides. Grow operators had also diverted and polluted water from nearby streams, and authorities seized 11 firearms from the sites during the raids.
Multi-Agency Effort Spanned Federal and State Partners
The scale of the operation required help well beyond the sheriff's office. The Lassen County Sheriff's Office publicly thanked Lassen County Code Enforcement, Lassen County Environmental Health, the Lassen County Road Department, the California Department of Justice's EPIC program, and the Bureau of Land Management for their roles in pulling off the raids, the station's report notes.
Sheriff's office detectives say they remain committed to bringing those responsible for the illegal grows to justice. Under Lassen County Code Section 19.140 and Section 19.170, the owners of record for the properties will be taxed based on the size of each grow, with the county able to impose civil penalties and place recorded tax liens against real property titles to recover enforcement costs, according to county meeting notices published by SusanvilleStuff.com.
Not Lassen County's First Rodeo With Illegal Grows
This is not the first time Lassen County has confronted large-scale illicit cultivation. In September 2025, a similar multi-agency sweep eradicated 34,166 illegal cannabis plants, seized more than 12,000 pounds of processed marijuana, and led to 14 arrests across Ravendale, Madeline, and Susanville, according to SusanvilleStuff.com. That earlier operation originated from intelligence gathered by the neighboring Modoc County Sheriff's Office.
Commercial cannabis cultivation is banned entirely in unincorporated Lassen County. Under Lassen County Code Title 19, adults 21 and older may only grow up to six live plants for personal, non-commercial use indoors or in an enclosed structure, according to CaliforniaCannabis.org. County voters rejected Measure S in 2022, which would have allowed regulated indoor commercial cannabis sites, leaving any large-scale grow in the unincorporated county squarely outside the law.
Part of a Statewide Crackdown on Black-Market Grows
Lassen County's bust lands amid a broader statewide push against illicit cannabis. The California Department of Justice's Eradication and Prevention of Illicit Cannabis program eradicated more than 728,000 illegal plants in 2025. The year before, EPIC removed nearly 775,000 plants and 106,000 pounds of processed cannabis valued at $353 million statewide.
California's Unified Cannabis Enforcement Task Force, formed in 2022, has seized more than $1.2 billion in illicit cannabis products between 2022 and early 2026, including 188 tons valued at $609 million in 2025 alone across 48 operations, according to CaNorml.org.
Enforcement on this scale doesn't come cheap for a rural county. In November 2024, Lassen County placed Measure V on the ballot, proposing a 1% sales tax in unincorporated areas to fund public safety, according to Ballotpedia.
