National Park Service centennial

Hundreds of tourists gather in early August to watch an eruption of Old Faithful at the Upper Geyser Basin in Yellowstone National Park. As the National Park Service celebrates its # centennial on August 25, Yellowstone, Grand Teton and other national parks around the country are experiencing record visitation that threatens the very resources that inspired the parks’ creation.

Diaper derby, Teton County Fair

Charlie Gorski encourages his 11-month-old son, Graham, in the diaper derby at the Teton County Fair with his daughter, Charlotte, 3, at his side on Saturday morning. Graham took home the bronze in the 2016 event.

Northern Arapaho Experience

Dinayla Augustine, Northern Arapaho Experience, Teton County Fair, Wyoming.

Clearing summer storm

Clearing summer storm, Grand Teton National Park, Wyoming.

Russell’s Corner

Russell’s Corner, Teton, Idaho.

Snow King ice rink construction

Kyle Gillespie, of Little Canada, Minn., checks his phone at Snow King Sports and Events Center on Thursday afternoon. Gillespie’s company, Rink-Tec, is installing new infrastructure for the facility’s ice rink improvements and will be pouring concrete today as the project moves toward a tentative September completion.

Teton Valley Balloon Rally

Hot air balloon pilots inflate their colorful crafts on the first day of the Teton Valley Balloon Rally in Driggs, Idaho.

Giants baseball

Jackson’s Matt Ellingson warms up before his at-bat in the sixth inning of the Giants’ 11-4 win over Blackfoot.

Lower Falls from Artist Point

A couple shares a quiet moment while taking in the view of the Lower Falls of the Yellowstone River from Artist Point recently in Yellowstone National Park.

Wineger Tree, National Elk Refuge

The shadow line created by the sun setting behind the Teton Range creeps across the Wineger Tree and the National Elk Refuge toward the Sleeping Indian and the Gros Ventre Wilderness last week. The tree was named after the Willis and Alice Wineger family that homesteaded nearby. Their acreage was transferred to the U.S. government in 1939.