Half Dome Information: https://www.nps.gov/yose/planyourvisit/halfdome.htm
Half Dome Hiking Permits: http://www.recreation.gov/unifSearchInterface.do?interface=applypermit&contractCode=NRSO&parkId=79064
The cables to the summit of Half Dome in Yosemite National Park are expected to be in place in May, depending on weather and trail conditions.
For more information regarding the lottery and the Half Dome cables, please visit www.nps.gov/yose/planyourvisit/halfdome.htm.
The trail to Half Dome from Yosemite Valley is an extremely strenuous hike covering over 17 miles. Hikers gain 4,800 feet of elevation along the trail that passes highlights such as Vernal Fall and Nevada Fall, before reaching the cables on Half Dome’s steep granite shoulder. Metal cables and wooden planks are placed along the steep shoulder of the dome to assist hikers to the summit.
Visitors are advised to take appropriate precautions when planning a hike of this length and difficulty, and to be prepared for changing weather and trail conditions. Thunder and lightning are common occurrences in the High Sierra during the summer and fall seasons. Hikers should not attempt to summit Half Dome when rain or thunderstorms are forecasted and are advised to use extreme caution when the rocks are wet. (NPS- K. Cobb)