Yellowstone National Park in the summer


Established in 1872, Yellowstone is the nation's oldest national park and one of the most visited. It's known for its geysers and hot springs. Indeed, Yellowstone contains 60% of the world's geysers, including Old Faithful, its most famous, and the Grand Prismatic Hot Spring, America's largest hot spring. The park also houses a rich collection of historical artifacts in its museum, library and research centers. In this series of photos, Los Angeles Times photographer Anne Cusack captures the colors and textures of Yellowstone in the late summer. For more photos, visit The Times' photography page.

Grand Prismatic Hot Spring

Runoff channels surrounding the hot spring

Visitors get a close-up look of Grand Prismatic

Steam rises from the hot spring

People walk along Grand Prismatic

Morning Glory Pool, another Yellowstone hot spring

The sun sets over Lower Geyser Basin

Mud bubbles in Fountain Paint Pot at Lower Geyser Basin

Bison graze in Lamar Valley

A pond in Lamar Valley

A hot spring in Midway Geyser Basin

(Anne Cusack / Los Angeles Times)

Snow-dusted mountain peaks


On the prowl for wolves in Yellowstone National Park

The 20 most-visited national parks in the U.S.

America's hidden gems: The 20 least-crowded national parks in 2009