Welcome to Live Golf Channels The 2013 Shell Houston Open is a golf tournament that is played annually in Houston, Texas. the week of March 25-31. It will be two weeks prior to the The Masters. Hunter Mahan is the defending champion. Net proceeds of tournament benefit Houston Area charities. The tournament is a PGA event, and features some of the top golfers in world. Shell Open is currently played atRedstone Golf Club, but in the past has been played at many of the Houston areas best courses. In the early years it was played at Memorial Golf Course, which is a fantastic public course located in the center of the city. It was also played at Champions Golf Club, which is widely regarded as one of the better golf courses in Texas. And it was also played at a couple of courses just outside the Houston city limits, Quail Valley and TPC at The Woodlands. But now the Shell Open has been at Redstone GC since 2003.