RELATED: Shake Shack's first Bay Area restaurant opens Saturday
Twitter user You You Xue shared pictures and video of the long line outside the location.
Shake Shack has plans for expanding its Bay Area presence with restaurants in Larkspur and San Francisco.
The popular East Coast burger chain has more than 200 locations around the world and throngs of die-hard fans, including former First Lady Michelle Obama.
RELATED: Robots making burgers for the public in San Francisco restaurant
Burger fans line up ahead of Shake Shack opening in Palo Alto