National Park Service rangers with Bureau of Land Management agents removed an illegal marijuana cultivation site in Sequoia National Park in the week before 21 August 2025, clearing 2,377 full-grown plants and about 2,000 pounds of trash and infrastructure by hand and helicopter sling-load.[1][2] The site also held a semi-automatic pistol and hazardous chemicals, including about a gallon of Methamidophos, an insecticide banned in the United States since 2009.[1][2]

Rangers had detected and raided the grow in 2024 but left it unrehabilitated for a year because of the chemicals.[1][2] The 13-acre site’s damage included diverted creek water with irrigation lines, storage pits, cleared vegetation, hillside terraces, campsites and about two miles of illegal trails.[1]

No arrests have been made, and the investigation continues.[1]