A section of Mountain View Drive will be closed temporarily over the weekend for one of Alaska’s most popular events.

Arctic Thunder — the military air show and open house at Joint-Base Elmendorf Richardson — drew more than 100,000 people when it was last held two years ago. This year’s event is also expected to see massive crowds.

According to Anchorage’s Public Works Department, Mountain View Drive will be closed at McCarrey Street and traffic will be detoured to DeBarr Road between 7 a.m. and 7 p.m. Saturday and Sunday. The department said drivers should also expect delays on Boniface Parkway between DeBarr and the JBER gate, as well as inbound on the Glenn Highway near gate access points.

Admission to the event is free; so is parking. JBER has a list of recommended items, as well as items forbidden on base. The show features flights by the U.S Air Force Thunderbirds Aerial Demonstration Team. Gates open at 9 a.m. Saturday, and the opening ceremony is scheduled to take place at 11 a.m.

If you want to avoid the crowds, you can still catch parts of the aerial displays at Sunset Park on Government Hill or at Davis Park in Mountain View.