While the National Park Service has been studying the impacts of e-Bikes in the National Park System, the agency really knows little about the impacts on the environment or on other trail users, according to Public Employees for Environmental Responsibility.

A spending bill designed to "rightsize" federal agency spending that was approved by the House Appropriations Committee on Wednesday would cut the National Park Service's upcoming budget by 12.5 percent, resulting in the loss of more than 1,000 park staff and reduce the agency's maintenance and historic preservation funding, according to the National Parks Conservation Association.

A tanker truck trying to negotiate the steep Mud Canyon Road in Death Valley National Park against regulations crashed when the brakes went out, spilling about 5,000 gallons of emulsified asphalt and 150 gallons of diesel, according to the National Park Service.

A Minnesota woman touring Theodore Roosevelt National Park in North Dakota was significantly injured when gored by a bison, the park announced Tuesday.