Obama was scheduled to return to Washington late Monday.
The White House says Obama was playing on the nine-hole course at the sprawling Sunnylands estate in Rancho Mirage. Childhood friends Bobby Titcomb, Greg Orme and Michael Ramos rounded out the foursome.
The group has teed off every day of the long weekend.
Obama stayed behind in California after holding talks at Sunnylands with Jordan's King Abdullah II on Friday night.