Authorities in southern Arizona report finding nearly 1,800 pounds of the illegal weed in a phony local government truck.
The truck had been made to look like it belonged the Santa Cruz County government, with fake decals on the doors.
U.S. Border Patrol agents found it abandoned earlier this week.
The pot was hidden underneath a black piece of plywood in the truck bed.
Authorities put the value of the marijuana at $875,000.