• A bull elk bugles in Yellowstone National Park


    National Park ID,MT,WY

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  • Craig Pass Closed for the Season; Mammoth to Norris Closed Sept. 14-30

    The road linking West Thumb and Old Faithful is closed for the season—traffic should detour through West Thumb, Lake, and Canyon. The road from Mammoth to Norris is closed for two weeks—traffic should detour over Dunraven Pass. More »

Recent Publications

Three grizzly bear cubs survey the landscape while standing close in front of their mother.
Grizzly sow with cubs
NPS Photo

Yellowstone is home to two species of bears. The publications listed below have a wealth of information about bear safety, ecology, and management.

Bear Management Issue Brief - February 2012 - Grizzly Bears and Whitebark Pine (21 KB pdf)

Grizzly Bears: Population Connectivity and Genetic Diversity (20 KB pdf)

A proposed lexicon of terms and concepts for human-bear management in North America - 2010 (312 KB pdf)

Genetic analysis of individual origins supports isolation of grizzly
bears in the Greater Yellowstone Ecosystem
- 2010 (330 KB pdf)

Hazards Affecting Grizzly Bear Survival in the Greater Yellowstone Ecosystem - 2010 (2.9 MB pdf)

Possible Grizzly Cub Adoption in Yellowstone National Park - 2008 (277 KB pdf)

Grizzly Bears in the Greater Yellowstone Ecosystem From Garbage, Controversy, and Decline to Recovery - 2008 (650 KB pdf)

Assessment of pesticide residues in army cutworm moths (Euxoa auxiliaris) from the Greater Yellowstone Ecosystem and their potential consequences to foraging grizzly bears (Ursus arctos horribilis) - 2006 (650 KB pdf)

Distribution of grizzly bears in the Greater Yellowstone Ecosystem in 2004- 2006 (154 KB pdf)

From the Field: Brown bear habituation to people-safety, risks, and benefits - 2005

Use of naturally occurring mercury to determine the importance of cutthroat trout to Yellowstone grizzly bears - 2004

Changing numbers of spawning cutthroat trout in tributary streams of Yellowstone Lake and estimates of grizzly bears visiting streams from DNA - 2005 (151 KB pdf)

Interactions between wolves and female grizzly bears with cubs in Yellowstone National Park - 2004 (112 KB pdf)

Grizzly bear-human conflicts in the Greater Yellowstone ecosystem, 1992-2000 - 2004 (208 KB pdf)

Use of sulfur and nitrogen stable isotopes to determine the importance of white bark pine nuts to Yellowstone Grizzly Bears - 2003 (2.6 MB pdf)

Grizzly Bear Denning and Potential Conflict Areas in the Greater Yellowstone Ecosystem - 2002 (199 KB pdf)

Bear-Inflicted Human Injuries in Yellowstone National Park, 1970-1994 (1.4 MB pdf)

Grizzly Bear Denning Chronology and Movement in the Greater Yellowstone Ecosystem (115 KB pdf)

Distribution of Grizzly Bears in the Greater Yellowstone Ecosystem (765 KB pdf)

Estimating Numbers of Females With Cubs-of-the-Year in the Yellowstone Grizzly Bear population (216KB pdf)

Grizzly Bear Predation in Yellowstone National Park (83KB pdf)

These pdf documents require Adobe Acrobat Reader (available free online) to be viewed or printed.

Did You Know?

Seventh Cavalry Ensignia Pin.

Prior to the establishment of the National Park Service, the U.S. Army protected Yellowstone between 1886 and 1918. Fort Yellowstone was established at Mammoth Hot Springs for that purpose.