I remember Gary Herman Hemi cars and the old Irwindale track very well , That picture must have been taken during the winter with a high pressure front to the northeast blowing all the smog out into the Pacific to be able to see the San Gabreil mountains that clearly. There less than ten miles away
I can remember racing at Pomona when the smog was in, you couldn't see the same mountains to the north from 3 miles away Some days when it was bad, you couldn't see one mile clearly