Officials said that the body was spotted in Olympic National Park in Washington State on Monday, but that it was pinned behind a surge of water and was hard to reach.

Violators could face up to six months in jail under the new rule, which appears to have been formalized last month.

© Carlos Avila Gonzalez/San Francisco Chronicle, via Associated Press

City authorities canceled an initial request to block off the site, an L.G.B.T.Q. gathering spot in Washington, D.C. But the National Park Service opted to close it.

© Andrew Harnik/Associated Press

Alex Chiu, an engineer and alpine climber, was on one of the most frequently used routes at Mount McKinley, the tallest peak in North America.

© Lance King/Getty Images

Their bodies were found near the summit of Mount Katahdin, at the end of the Appalachian Trail, officials said, after a search that began on Monday.

Michael Boren, nominated by President Trump, is accused of threatening trail workers with a helicopter, building an airstrip without a permit and putting a cabin on federal property.

© Aaron Agosto for The New York Times