The struggling Toyota Speedway at Irwindale put out a terse statement saying that the race track's 2012 season has been canceled. From Tim Haddock at ESPN LA:
Irwindale Speedway has been hit with a number of setbacks over the past few months that all pointed to its closing. The grandstands in the pit area of the track were taken down on Saturday. The offices at the track, including vice president and general manager Bob DeFazio's, were cleaned out and emptied on to moving trucks. Only L.A. Racing Experience, a driving school at the track, remain.
The canceling of the racing season at Irwindale Speedway marks the end of stock car and NASCAR-sanctioned short track racing in Los Angeles County.