Shoreline Amphitheatre is an outdoor amphitheater located in Mountain View, California, in the San Francisco Bay Area. The venue has a capacity of 22,500, with 6,500 reserved seats and 16,000 general admission on the lawn. When the parking lot is utilized for festival stages, the total capacity of the venue can reach 30,000. The venue has hosted popular music festivals such as Lollapalooza and Ozzfest, and also developer conferences such as the Google I/O.

An amphitheatre or amphitheater is an open-air venue used for entertainment, performances, and sports. The term derives from the ancient Greek ἀμφιθέατρον, from ἀμφί, meaning "on both sides" or "around" and θέατρον, meaning "place for viewing".