Her playing partner, second-ranked Stacy Lewis, had a rough day with a 76 that left her at 3 over.
Among the players still on the course were Michelle Wie, who was at 3 over for the round through 17 holes after an 80 on Thursday, and 16-year-old amateur Lydia Ko, at 3 over for the tournament through 16. The round will resume at 7 a.m. Saturday, with the third round beginning around 10:30 a.m. Players will start in groups of three from the first and 10th tees.
Salas was frustrated that she barely missed several birdie putts, but she knows her 72 was a good score in the swirling wind Friday.
"You just can't be too greedy out here," she said. "Just hitting fairways, hitting greens, that was my goal. Eventually the putts will drop."
The wind stirred up more trouble following her round. Walking off the 18th green after saving par, Salas suddenly realized she had lost the scorecard she was keeping for Stanford. She deduced it was blown away while she was signing autographs, and after a couple of minutes it turned up in the hands of a spectator.
"I think he was trying to keep it as a souvenir," Salas said. "I was asking everyone and no one saw it. And apparently some dude picked it up."
The 20-year-old Korda has been one of the most consistent players this week with rounds of 70 and 71. Meanwhile, her 14-year-old sister, Nelly, was the youngest player in the field. Their father, 1998 Australian Open tennis champ Petr Korda, caddied for Nelly, who finished at 6 over — which would make the projected cut.
Stanford matched Park with the best score of the day. A decade ago at the U.S. Women's Open, Stanford reached a playoff, in which she made a 30-foot putt on the final hole. Then she watched Hilary Lunke hole a 15-footer for the win.
Stanford is still seeking her first major title at age 35.
Upset that she shot a 73 on Thursday in favorable conditions, Stanford found some patience in the second round — not a mindset that comes easily. She credited her caddie for some recent counsel: "You've just got to pray for acceptance."
"And I was like, whoa. I didn't see that one coming," Stanford said. "Like I just need to accept certain things, and I think I've been very upset that I haven't won a major. ... So I think there is a level of peace right now and it's different. I'm not as mad as I usually am. I have a lot of great things to be thankful for, so I'm trying to enjoy this week, and I'm trying to enjoy the scenery."