NOTE: “Today” and “tonight” refer to Friday, April 22.

Olympic National Park will waive entry fees through Sunday and entry into state parks will be free today.

The national park is waiving the fee in honor of National Park Week.

Entry to the park is usually $25 per vehicle for a seven-day pass. An annual pass is available for $50.

A lifetime senior pass is available for $10 for park users 62 and older, and an active-duty military member or dependent pass is available for free.

On fee-free days, other park fees, including wilderness camping and campground fees, will remain in effect.

Other national park free days for the year will be:

■ Aug. 25-28, in celebration of the 100th anniversary of the National Park Service.

■ Sept. 24 for National Public Lands Day.

■ Nov. 11 for Veterans Day.

State parks

In honor of Earth Day, state park visitors will not need to display Discover Passes for day-use visits.

State parks on the North Olympic Peninsula are Bogachiel near Forks, Dosewallips near Brinnon, Fort Flagler on Marrowstone Island, Fort Townsend and Fort Worden in Port Townsend, Anderson Lake State Park near Chimacum and Sequim Bay near Sequim.

The Discover Pass is a $30 annual or $10 one-day permit required on recreation lands managed by State Parks, the state Department of Fish and Wildlife, and the state Department of Natural Resources.

The free days apply only at state parks found at www.parks.wa.gov; the Discover Pass is still required on Fish and Wildlife and DNR lands.

Free days apply only to day use, not to overnight stays or facilities.

The remaining 2016 state parks free days are as follows:

■   May 8: A springtime free Sunday.

■   June 4: National Trails Day.

■   June 11: National Get Outdoors Day.

■   Aug. 25: National Park Service 100th birthday.

■   Sept. 24: National Public Lands Day.

■   Nov. 11: Veterans Day.

For more information about National Park Week, see http://tinyurl.com/PDN-nationalparkweek.

More information about the Discover Pass is at www.discoverpass.wa.gov, and more information about state parks is at www.washingtonstateparks.us.