October 18, 2012 - Yosemite National Park will reopen the Mirror Lake Loop hiking trail on Thursday, October 18, 2012, at 5:00 p.m. The five mile loop that follows Tenaya Creek around Mirror Lake in Yosemite Valley has been closed since March 28, 2009 due to a large rockfall from Ahwiyah Point near Half Dome.
Yosemite Trail Crews have constructed a new trail on the
edge of the talus slope near Tenaya Creek.
Rocks fell approximately 1,800 feet to the floor of Yosemite
Valley from Ahwiyah Point, knocking down hundreds of trees and burying hundreds
of feet of the trail on the southern portion of the loop. The impact of the
rocks hitting the ground generated a magnitude of a 2.4 earthquake. The rockfall
was estimated to be approximately 43,000 cubic meters, or 115,000 tons. No
injuries or structures were affected by the rockfall. Due to its steep,
glacier-carved cliffs, Yosemite Valley experiences many rockfalls each year