National Park Service shares the following:
MOOSE, WY- A traditional cattle drive will take place early Saturday morning, August 3, in Grand Teton National Park. While the cattle drive is underway, a two-mile stretch of U.S. Highway 26/89/191 will be temporarily closed to vehicle traffic from Moran Junction to the Elk Ranch Flats area that lies just one mile south of the junction in the northern area of the park. Motorists should expect a travel delay between approximately 7 a.m. and 8 a.m. as cattle are herded from their summer pasture at Elk Ranch Flats to their pastures east of Moran. Park rangers will provide traffic control on the highway during this cattle drive.
Ranch wranglers will drive a herd of approximately 300 cattle eastward from the Elk Ranch Flats summer pasture to the private ranch using a right-of-way along U.S. Highway 26/287. As the cattle are herded towards Moran Junction, the animals must cross the Buffalo Fork Bridge on the highway.
To avoid the travel delay, motorists may choose to use an alternate route and drive the Teton Park Road between Jackson Lake Junction and Moose Junction.
In accordance with the 1950 Grand Teton National Park enabling legislation, certain historic grazing privileges were retained. Since that time, the fenced and irrigated Elk Ranch Flats pastures have been used for grazing each summer season.