In northern Minnesota, tucked up against the Canadian border, thousands of furry engineers are at work.

Frigid weather and stormy conditions closed many national parks across the country on Friday, from Knife River Indian Villages National Historic Site in North Dakota and Badlands National Park in South Dakota to Appomattox Court House National Historical Park in Virginia and the Carl Sandburg Home National Historic Site in North Carolina.

Ever-rising costs in the battle against aquatic invasive species in the National Park System are driving up the costs of boating in some parks.

Campground fee increases will take effect for Sequoia and Kings Canyon national parks in California on January 1. This is the first of two increases, with the second set to take effect in 2024, according to a park release. This phased increase brings the two parks' campground fees in line with prices of similar campgrounds in the area and follows a public comment period that was announced in August 2022.