สนามแข่งรถ Hidden Valley Raceway มีกี่รอบ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
What was the number of rounds on the Hidden Valley Raceway?It is not neccessary to use all the tables.
 table_14016079_1:  (rd [ VARCHAR ] circuit [ VARCHAR) ]
SELECT COUNT(rd) FROM table_14016079_1 WHERE circuit = "Hidden Valley Raceway"