Photos: Outside Lands kicks off in Golden Gate Park

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons perform on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. The festival runs through Sunday and headliners include Mumford & Sons, Elton John and the Black Keys. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons lead vocalist Marcus Mumford performs on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons perform on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons bassist Ted Dwane performs on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons perform on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons lead vocalist Marcus Mumford performs on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons guitarist and banjo player Winston Marshall performs on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons keyboardist Ben Lovett performs on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

A fan watches as Mumford & Sons performs on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons keyboardist Ben Lovett performs on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons fans react as they perform on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Mumford & Sons bassist Ted Dwane performs on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Fans display a lighted sign as Mumford & Sons perform on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Lead singer and guitarist Jeff Tweedy, center, performs with Wilco on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Lead singer and guitarist Jeff Tweedy performs with Wilco on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Lead singer and guitarist Jeff Tweedy, left, and bassist John Stirratt perform with Wilco on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Drummer Glenn Kotche performs with Wilco on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Festivalgoers crowd the Polo Field looking towards the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Guitarist Pat Sansone performs with Wilco on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Fans crowd the front row as Wilco performs on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Bassist John Stirratt performs with Wilco on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

,Lead singer and guitarist Jeff Tweedy, left, and bassist John Stirratt perform with Wilco on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Guitarist Nels Cline performs with Wilco on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Lead singer and guitarist Jeff Tweedy performs with Wilco on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)

OUTSIDE LANDS MUSIC FESTIVAL

Fans listen to the St. Vincent set featuring vocalist Annie Clark on the Lands End main stage during the Outside Lands Festival in Golden Gate Park in San Francisco, Calif., on Friday, Aug. 7, 2015. (Jane Tyska/Bay Area News Group)