The spine of the Appalachian Range runs north and south through the Mid- and South-Atlantic states, a rumpled stretch of mountains that long has provided a corridor for species. One uninvited species, the Hemlock Woolly Adelgid, arrived in 1951, and since then has attacked hemlock forests once commonplace in Shenandoah National Park, the Blue Ridge Parkway, and Great Smoky Mountains National Park. Since 1988 the National Park Service has been battling the tiny insect, and has met with varying success in those three parks. While much work remains to be done, there is optimism some of the hemlock stands will be saved. In the following stories, we take a look at the campaign.

Travel in Great Smoky Mountains, Mammoth Cave, and Shenandoah national parks, and no doubt some others, was dicey Friday morning due to a winter storm that was coating roads with ice and snow.

Funding from the Shenandoah National Park Trust is underwriting a graduate student's research into how oak and pine forests in Shenandoah National Park recover after fires.

The second step of a fee increase proposed two years ago by Shenandoah National Park will go into effect January 1, when seven-day passes for vehicles and motorcycles will rise by $5.