EDINA, Minn. — The sun was shining bright, with barely a breeze, setting up the field at Interlachen for some low first-round scores in the face of those liberally sloped greens and the longest total yardage in U.S. Women's Open history.

Lorena Ochoa failed to take full advantage, and Annika Sorenstam had an even harder time.

It was 19-year-old Ji Young Oh and 39-year-old Pat Hurst who emerged with a share of the lead on a Thursday filled with surprises.

Ochoa, the top-ranked player in the women's game who has won two of the past three majors, didn't make a birdie until the 14th hole during a morning of soft greens following a watering of the course the night before.

"It's just too hard to believe, you know? Beautiful conditions," said Ochoa, who rallied with three birdies on her last five holes to finish with a par 73 — six strokes behind Oh and Hurst.

"I didn't play aggressive enough at this time," Ochoa said, "and I hit the ball a little bit bad in the middle of the round. But luckily I finished with a birdie so I'm feeling good right now."

Sorenstam, playing her final Open with retirement pending at the end of the season, walked off with a 75. She made four bogeys in a six-hole stretch and signed for her highest opening round at this major since she played in 1992 as an amateur. The 37-year-old Swede sounded positive, though, as she dissected her performance.

"I'm hitting the ball beautifully," Sorenstam said. "Maybe one shot here or there that I missed. Other than that, it's on the numbers. The direction, everything, it feels very, very good. So I just got to be patient.

"I know I got the game and I love the golf course ... just a long ways to go."

Michelle Wie's road back to recovery is even longer after shooting an 81.

Hoping to build on recent momentum after a rough couple of years on tour, Wie butchered the ninth hole on her way to a quintuple-bogey 9 — lightly dinging the shaft of her putter against her head in dazed frustration.

Hurst was headed that way after missing yet another short putt, but she played her next seven holes in 6-under par and finished off her round of 6-under 67 with an 8-iron that rolled off the fringe to 3 feet.

Oh was in the morning group and didn't have to work too hard on the greens. All seven of her birdies were inside 10 feet, and four of them were inside 2 feet.

"I love hitting my drivers and short irons," Oh said. "And for that, I think this golf course suits my game pretty well."