GRAND CANYON NATIONAL PARK, Ariz. (AP) — Google is giving people a way to virtually hike the Grand Canyon. The search giant released images Thursday that map the most popular trails at the park ...

But on the bell curve of demanding, one stands out — the Nankoweap Trail. Of all the named trails in the Grand Canyon, this 11-mile hair-raising trek is classified as the most difficult.

Adjacent to Grand-Teton National Park, Yellowstone National Park, and the National Elk Refuge, the NFF recommends the 3.4 million-acre Bridger-Teton National Forest, which has 37 developed ...