People who want to visit Theodore Roosevelt National Park can do it for free on Sunday.
Entrance fees are being waived at the western North Dakota park in honor of the 103rd birthday of the National Park Service. Fees also are being waived at Park Service sites across the country.
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Two more "fee-free" days remain this year -- National Public Lands Day on Saturday, Sept. 28, and Veterans Day, on Monday, Nov. 11.
Two other national park units in North Dakota -- Fort Union Trading Post National Historic Site, near Williston, and Knife River Indian Villages National Historic Site, near Stanton -- never charge entrance fees.