• The Cathedral Group from the Teton Park Road

    Grand Teton

    National Park Wyoming

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  • Bears are active in Grand Teton

    Black and grizzly bears are roaming throughout the park--near roads, trails and in backcountry areas. Hikers and backcountry users are advised to travel in groups of three or more, make noise and carry bear spray. Visitors must stay 100 yards from bears. More »

  • Area closure in effect for trails in the Jenny Lake Area

    A temporary area closure will be in effect for several trails in the Jenny Lake area due to construction activities involving helicopter-assisted transport of heavy material. The closure will last from October 27 through October 30, and possibly longer. More »

  • Multi-use Pathway Closures

    Intermittent closures of the park Multi-use Pathway System will occur through mid-October during asphalt sealing and safety improvement work. Pathway sections will reopen as work is completed. Follow the link for a map and more information. More »

  • Moose-Wilson Road Status

    The Moose-Wilson Road between the Death Canyon Road and the Murie Center Road is currently open to all traffic. The road may re-close at any time due to wildlife activity. For current road conditions call 307-739-3682. More »

Grand Teton to Host Special Venus Transit Viewing Event June 5

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Date: June 1, 2012
Contact: Public Affairs Office, 307.739.3431

Grand Teton National Park in partnership with the Jackson Hole Astronomy Club will host a Venus transit viewing event on Tuesday, June 5 from 4 p.m. until sunset. Join professional astronomer and Park Ranger Naturalist Robert Hoyle at the Willow Flats Overlook north of Jackson Lake Junction for this once in a lifetime event.

The June 5 event will be the last Venus transit until 2117. Due to orbital geometry, transits of Venus-when Venus moves between the Earth and the Sun-occur in pairs separated by eight years with the first of the current pair occurring in 2004. Venus transit pairs are separated by either 105.5 years or 121.5 years. If the orbit of Earth and the orbit of Venus were in the same plane, transits would occur every 584 days. However, the orbit of Venus is inclined to the Earth's orbital plane by a little over 3 degrees so the two planets only truly line up over the much longer intervals at which the transits occur.

Venus transits are significant in the history of observational astronomy. During the 1700's, observations of such transits provided the only method of determining the Earth-Sun distance and hence the true scale of the solar system.

Several telescopes equipped with special solar filters will be available to safely watch this event. Views will also have the chance to see some of the numerous sunspot groups currently visible on the Sun's surface. Visitors are cautioned that the Sun can only be observed safely through special filters. Sunglasses and photographic filters do not provide adequate protection and their use can lead to permanent eye damage.

Reservations are not required for this event. For more information, please contact the Colter Bay Visitor Center at 307.739.3594.

Did You Know?

Uinta Ground Squirrel

Did you know that Uinta ground squirrels, sometimes mistaken for prairie dogs, hibernate up to eight months a year? These animals leave their burrows in March or April to inhabit the sagebrush flats, but may return by the end of July.