The last building to be erected in old Fort Yellowstone, the ecumenical Yellowstone Chapel in Mammoth Hot Springs is 100 years old today.

A study argues the number of Yellowstone grizzlies could be in decline and far from the robust status needed to remove the bears from endangered status.

The landscape around Old Faithful is changing, as the former Old Faithful Haynes Photo Shop has been moved to a spot next to Old Faithful Lodge, opening tomorrow as exhibit space for the Yellowstone Park Foundation (YPF) and the National Park Service.

Access to Inspiration Point, which provides spectacular views of the Grand Canyon of the Yellowstone and the Lower Falls, has been closed because of the poor condition of stairs leading to the viewing area.

The norovirus causing gastrointestinal (GI) illness in Yellowstone and Grand Teton National Parks is proving to be hard to defeat, as visitors are warned to be vigilant against the nasty bug.

A plan to rebuild a small bridge across Isa Lake at Craig Pass — on the Continental Divide — has been approved after an environmental review.

The scheduled Dunraven Pass and Beartooth Highway openings hit snags this morning, with bad weather indefinitely delaying the opening of the Beartooth Highway.

The Yellowstone South Entrance is now open for the 2013 season, allowing visitors to navigate between Grand Teton National Park and Jackson, Wy., to Grant Village, West Thumb Junction and on to Fishing Bridge and across Craig Pass to Old Faithful.

Another milestone day in Yellowstone National Park access: the Yellowstone East Entrance is open, while road crews have made significant progress in clearing the road between the South Entrance and Old Faithful.

One brief blip if you’re heading to Yellowstone National Park in coming weeks: Black Sand Basin access is blocked until at least the Memorial Day weekend while maintenance crews replace and reroute a section of boardwalk damaged by the area’s thermal features.