Half Dome cables day use permits for the 2013 hiking season will be available for reservation starting tomorrow, Friday, March 1, through Sunday, March 31, 2013. Permits to hike to the top of Half Dome are required seven days per week and reservations will be distributed via a lottery system. Successful parties will be notified in early April. A maximum of 300 hikers will be allowed on the Half Dome cables per day. https://www.nps.gov/yose/learn/news/hdlottery13.htm