Campbell has carded rounds of 67 and 70 at Golf de Chantaco in St Jean de Luz to sit at three-under and five back from outright leader, Maria Hernández.
Hernandez has maintained her narrow lead after adding a three-under-par 67 to her opening 65 on the par 7- layout. On another warm and sunny day, the 28-year-old from Pamplona carded three birdies on the front nine at the third, seventh and ninth holes before coming back in level par with two birdies on the 13th and 14th against a pair of bogeys on the 11th and 18th.
“It was a good day out there today again. I was playing very solid. I hit the ball very consistent through 18 holes and didn’t miss a shot,” said Hernández.
“I just made a couple of mistakes with my putter and that was it: that’s why the round wasn’t lower.”
The three players a stroke behind going into the weekend are fellow Spaniard Carlota Ciganda, England’s Florentyna Parker and amateur Albane Valenzuela, 16, from Switzerland.
The defending champion Azahara Munoz, Charley Hull and Isabelle Boineau were on five under par and three strokes off the lead at the halfway point.
Queenslander Bree Arthur, is just a further shot behind Campbell and is tied for 12th position. Nikki Garrett is tied for 40th at three over, while Kiwi Cathryn Bristow is at four-over and tied for 47th.
The cut was made at five-over and 58 players will contest the final two rounds. Unfortunately Whitney Hillier missed the cut by one shot.