South Koreans Jiyai Shin, I.K. Kim, So Yeon Ryu and Hee Kyung Seo finished the day atop the leaderboard at 11-under 202 to set up a grandstand finale on Sunday at the Highland Meadows Golf Club.
"It will be really exciting Sunday," said Kim. "These are players that I grew up with. I know them personally and I know their family issues and all that. So, even though we're playing in the US, having them around I feel much more at home."
Two more Koreans - Inbee Park (69) and Chella Choi (70) - are a shot back along with Japan's Mika Miyazato.
"There are a lot of Korean players on tour," said Shin. "We are very close because we came over to play in the US. We were homesick, missing our friends and family in Korea. And that has made us close to each other."
Americans Jacqui Concolino (69) and Angela Stanford (69) were tied at eight-under with Pernilla Lindberg of Sweden (70) and yet another South Korean, Hee-Won Han (70).