• The Cathedral Group from the Teton Park Road

    Grand Teton

    National Park Wyoming

There are park alerts in effect.
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  • Seasonal road closures in effect

    Seasonal road closures are in effect for motorized vehicles. The Teton Park Road is closed from the Taggart Lake Trailhead to the Signal Mountain Lodge. The Moose-Wilson Road is closed from the Granite Canyon Trailhead to the Death Canyon Road. More »

  • Avalanche hazards exist in the park

    Avalanche hazards exist in the park, especially in mountain canyons and on exposed slopes. A daily avalanche forecast can be found at www.jhavalanche.org or by calling (307) 733-2664. More »

  • Bears emerging from hibernation

    Bears are beginning to emerge from hibernation. Travel in groups of three of more, make noise and carry bear spray. Visitors must stay at least 100 yards from bears. More »

Non-native Species

Thistle is a pernicious weed that is difficult to remove and crowds out native vegetation that animals depend on.

Thistle is a weed that can crowd out native vegetation, leading to forage and habitat loss for wildlife in the park.



Grand Teton National Park is home to a large number of plant and animal species, unfortunately some of these species do not occur here naturally. Non-native species out-compete the native plants and animals for resources leading to a decrease in habitat for native species and biodiversity.

Park scientists fight noxious weeds with mechanical (hand or tool control), chemical, biological and cultural controls. Biological controls involve using native predators of the weed (usually insects) to control its spread. Cultural controls include educating people about the dangers of noxious weeds and changing their behavior to avoid further weed spread. The park is also involved with local agencies, groups, and individuals to help control the spread of non-native weeds in the Jackson Hole valley. Visit http://www.jhwma.org for more information on this cooperative effort.

The park also hosts non-native aquatic species such as the New Zealand Mud Snail. Many varieties of non-native fish such as lake and brown trout are found in many of the park's streams and lakes. The park is actively working to control the spread of all types of exotic species and are having some success, especially with a few of the plant species. These control efforts will be ongoing for many years.

Did You Know?

Close-up of a lodgepole pine cone

Did you know that lodgepole pine trees grow on glacial moraines in Jackson Hole? Glacial moraines are ridges of rocky debris left behind as Ice Age glaciers melted. The soil on these ridges retains moisture and is more hospitable to trees than the cobbly, porous soil on the outwash plain.