The National Park Service is giving people more time to weigh in on a proposed fee increase at 17 of its most popular parks.
The comment period had been scheduled to end Nov. 23. The new deadline is Dec. 22.
The Park Service said it wanted to accommodate interest from Congress and the public. More than 65,000 comments already have been submitted.
Most of the 17 sites are in the West, including Grand Canyon, Yosemite, Yellowstone, Zion and Mount Rainier.
The Park Service says it would raise $70 million annually under the proposal. The revenue would fund maintenance and infrastructure projects.