The Mist Trail in Yosemite National Park has been temporarily closed until at least noon tomorrow, Wednesday, July 20, 2011, or longer. Visitors wishing to hike from Happy Isles will need to ascend the John Muir Trail, bypassing the Mist Trail, which leads to Vernal Fall.
The park has received unconfirmed reports of one or more visitors going over Vernal Fall early this afternoon. Rangers are currently on scene conducting a search and rescue operation.
No further information is available at this time. The park will issue a news release when the trail reopens or information becomes available.
Source: U.S. Department of the Interior, National Park Service