A two-week search for a missing hiker in Yosemite National Park. A search for a missing snowshoer on Mount Rainier. Recovery of bodies from climbing accidents in Grand Teton National Park. A week-long, and unsuccessful, search for a missing 8-year-old at Crater Lake National Park. Each year, thousands of search-and-rescue missions cost the National Park Service millions of dollars. And each year the agency eats the costs.

Has Yellowstone National Park's wolf recovery program, now more than a decade old, succeeded? The federal government thinks so, as evidenced by the removal of greater Yellowstone wolves from the Endangered Species List. But a coalition of conservation group differs, and has filed a lawsuit to overturn the delisting.

Beginning this Saturday, if you're planning a backcountry trek into Grand Teton National Park you more than likely will be required to store your food in a bear-proof plastic canister.

Grand Teton National Park not only is one of America’s most photogenic national parks but, oddly enough, it's one of our most controversial.