If you’re heading to the sold-out Mumford & Sons concert Wednesday at Montrose Beach, leave your car — and your selfie sticks — at home, organizers say.

Gates open at 3 p.m. for the concert at Cricket Hill inside the lakefront park on the North Side. The British rock band is touring after the release of its third album, “Wilder Mind,” and is joined by opening acts The Maccabees and Son Little.

Roughly 35,000 people are expected to attend, according to the city’s Office of Emergency Management and Communications.

No parking will be provided for the event, according concert organizer JAM Productions. Concertgoers are strongly encouraged to use public transportation, bike or take a Divvy bike instead of driving.

JAM Productions is providing a free bike valet for the first 4,000 bicycles on site, the concert’s website said. Cyclists can drop off their bikes and gear at the east entrance along Montrose and pick them up after the event.

Divvy representatives will also be at the east entrance to valet bikes before the event and provide additional bikes after the show, the website said.

The CTA will provide extra bus service along the No. 78 Montrose, No. 81 Lawrence and No. 146 Inner Drive/Michigan Express routes from 4 p.m. until one hour after the concert ends, the transit agency said.

The Red Line will also have extra train service for concertgoers, the CTA said. The Wilson station is about two blocks west of the lakefront park.

Anyone walking to or from concert should stay clear of Lake Shore Drive and use the pedestrian underpasses below it at Montrose, Wilson and Lawrence.

Montrose, Wilson and Lawrence streets will also be closed to traffic east of Lake Shore Drive because of the concert.

The show will go on rain or shine. The first act starts about 6 p.m. and the show should end by 10 p.m. Attendees must bring printed copies of their tickets, as tickets on cellphone screens will not be accepted, the concert’s website said.

Small backpacks, water bottles, blankets, strollers and nonprofessional cameras are allowed. Lawn chars, umbrellas, selfie sticks, coolers and other large items are prohibited.

Outside food and drinks will not be permitted, but there will be vendors selling food, beer, wine and cocktails inside the park.