A study into the experiences of backpackers in Yellowstone National Park came away with the conclusion that almost all had a great experience. Most said they didn't think the park's backcountry was crowded, and they had no problem with the fees they had to pay.

Though a winter heavy with snow means lots of blooming wildflowers in Sequoia and Kings Canyon national parks in California, it also means there aren't a lot of campsites to pitch your tent in and rivers are running full, cold, and dangerous.

Word Friday that the partial government shutdown would be lifted for three weeks, if not longer, was welcomed by groups concerned about the state of the National Park System. But they also called on Congress to ensure a similar event never happens again.

Sequoia and Kings Canyon national parks were closed entirely Wednesday evening by National Park Service officials due to unsanitary conditions that were creating health and safety concerns. The two parks, in California's Sierra Nevada, are believed to have become the first in the National Park System to be entirely closed due to visitation problems since the partial government shutdown began nearly two weeks ago.