Suzann Pettersen shot an 8-under 64 to share the second-round lead with Brooke Henderson at the Cambia Portland Classic at Columbia Edgewater Country Club.
Henderson, the defending champion, shot a 4-under 68 to get to 11 under. Henderson bogeyed the 17th and fell off the share of the lead briefly, but rebounded with a birdie at the last hole to grab a share of the lead.
Mariajo Uribe is one shot back in solo third after her second straight 5-under 67. Austin Ernst, Pernilla Lindberg and Angela Stanford are each in joint fourth at 6 under.
Petterson, who is a two-time winner in Portland (2011, 2013), was bogey-free in her second round, and posted the best round of her season to date.