The 2004 United States Open Championship was the 104th U.S. Open, held June 17–20 at Shinnecock Hills Golf Club in Shinnecock Hills, New York. Retief Goosen won his second U.S. Open title, two strokes ahead of runner-up Phil Mickelson, the reigning Masters champion. The purse was $6.25 million with a winner's share of $1.125 million. Late on Sunday in dry and breezy conditions, Goosen birdied the 16th hole and Mickelson double-bogeyed the par-3 17th. Goosen's previous U.S. Open win was in 2001 in a playoff at Southern Hills.