Golf architect Tom Doak has walked a few courses in his life, but on July 4 he’ll attempt to walk—and play—six of them in one day. Doak is the latest to sign up for the 100 Hole Hike, a global network of golf marathons organized to raise money for a variety of good causes. He’s made a wise choice for his debut—St. Andrews—both because it will bring him back to the place where he nurtured his love of golf architecture and because there are few flatter, easier-to-walk courses than those of the Auld Grey Toon. Doak's trek will begin at the Old Course at dawn, proceed through the New, Jubilee, Eden, Strathtyrum, and nine-hole Balgove courses, and conclude with a return to the first tee of the Old for hole number 100. Similar hikes are scheduled this summer at two dozen sites around the U.S. including Pinehurst and Medinah. Think you do it? Contact founder Jim Colton (who once walked 155 miles in one day) at email@example.com.