 In 1937, their father Patrick McDonald opened "The Airdrome", a food stand, on Huntington Drive (Route 66) near the Monrovia Airport in the Los Angeles County city of Monrovia, California with hot dogs being one of the first items sold.Hamburgers were later added to the menu at a cost of ten cents with all-you-can-drink orange juice at five cents.In 1940, Maurice and Richard moved the entire building east, to West 14th and 1398 North E Streets in San Bernardino, California.