The Grand Canyon, for example, believed that adequate regulations and resources to control jet ski activity were in place. However, after several magazines began promoting jet ski adventures in the Canyon, their numbers soared, as did the problems associated with their use. The Grand Canyon's example shows how quickly problems develop, which can overwhelm the National Park Service's ability to control them. In response to the rise in PWC problems, the Grand Canyon joined parks such as Olympic, Glacier, Everglades, Canyonlands, Cape Hatteras, Canaveral, and Yellowstone and banned jet ski use park-wide. The NPS is not obligated to accommodate every new recreational activity, and in the past has limited or restricted activities that are not resource based, or that impact park resources and values.
Numerous studies show that jet skis cause lasting damage to park resources and wildlife.