There is a problem facing America's national parks. While they are obviously meant to be enjoyed, are we taking our activities in these parks too far? The following is an excerpt from a National Geographic article explaining the dilemma:

"Popular parks like Yosemite face overcrowding issues that would have amazed John Muir. Managers must balance open access with negative impacts on visitor experience and on park environments.

Today’s visitors also use parks in new ways. Snowmobilers prowl Yellowstone and pilots fly visitors over the Grand Canyon. Mountain bikers, motorboaters and many others all hope to enjoy their favorite pastimes in their favorite parks.

Does allowing such activities enhance the park experience or detract from it? Managing preferences and park usage conflicts is a growing challenge for administrators—but NPS Chief of Public Affairs David Barna says the top priority is clear."