Rangers continued Wednesday to look for a mountain lion that attacked a young boy in Big Bend National Park and which is thought to have aggressively approached a family out hiking the same day.

Winter and spring are popular seasons for visiting Saguaro National Park, and for good reason. It's a great time of the year to enjoy the Arizona desert, and two "roads less traveled" and a variety of trails offer access to fine desert scenery.

The League of Conservation Voters has released its annual ranking of congressional delegations from around the country, and it's not very pretty for most members of the House of Representatives.

With nearly 400 units of the National Park System, one probably is close enough for you to visit in a day. But how should you organize those visits? Karen Beck-Herzog, the management assistant at Shenandoah National Park, put together the following primer for exploring her park.