WASHINGTON – More than 100 national parks that usually charge entrance fees will be offering free admission the weekend of Aug. 14-15.

In addition, many national park concessionaires have special offers for the weekend with discounts and coupons for rooms, tours and products.

Two more days with free entrance are scheduled for the fall on Sept. 25 and Nov. 11.

Parks participating in the free weekend include Acadia in Maine, Glacier in Montana and Shenandoah in Virginia.