A rally to raise public awareness about wolves in and around Yellowstone National Park is scheduled for late June near the north entrance to the park at Gardiner, Montana.

In what would be a milestone for the California condor recovery program, biologists believe a pair of the large birds has hatched a chick high in the cliffs of Zion National Park.

The moose population at Voyageurs National Park in Minnesota seems to be holding its own, according to a recent survey conducted by park biologists. While the herd isn't growning, moose mortality rates in Voyageurs are about half of that found elsewhere in northeastern Minnesota, officials say.

Yosemite National Park, one of the most-visited parks in the system, likely will be even busier this year as attention is drawn to the 150th anniversary of the Yosemite Grant that set aside the landscape for protection and which was a prelude to the idea of creating "national parks." As a result, park officials have some tips you might consider for avoiding the crowds as much as possible when you visit Yosemite.