The Ultra Grand Slam (aka The Grand Slam of Ultrarunning) consists of officially finishing the Western States 100 Mile Endurance Run, the Vermont 100 Mile Endurance Run, the Leadville Trail 100 Mile Run and the Wasatch Front 100 Mile Endurance Run all in the same year. The Grand Slam of Ultrarunning Award was established in 1986, when Tom Green was the first finisher. The deadline to sign up for this year is June 20, 2007 - there's still time!
47-year-old Halke has run three 100-milers and 79 marathons, with respective best times of 25:12 and 3:28:33. You can read his 2005 Western States race report here. He started his ultra running in 2002 with a 9:26 finish at the JFK 50 where he "enjoyed himself way too much". If you see him at the races, be sure to cheer him on!
If you would like to help Halke in his quest, you can send a check to the American Cancer Society to 3211 N. Front St., Suite 100, Harrisburg, PA 17110.