Pak, the 98 and 99 champion of the event, carded a 2-under-par 69 on Day Three to move to 12-under 201.
She leads by four shots over Kris Tschetter (68), Meg Mallon (68) and Heather Bowie (71), and by five over Moira Dunn (70), who sits in fifth-place at minus-seven.
Paks day began right where it left off following Fridays superb performance, as the 23-year-old product of South Korea birdied the par-4 3rd to move to minus-11.
She immediately gave the shot back at the sixth with a bogey, but quickly atoned for the mistake with another birdie at No. 8.
Following one more blemish at the 11th, Pak rallied with closing red numbers at the par-4 13th and par-5 17th holes.
The winner of this years YourLife Vitamins Classic and Longs Drugs Challenge, Pak is coming off a winless 2000 season, during which she apparently made several swing and caddie changes.
Those changes appear to be working out just fine thus far in 2001.
In addition to her two victories, Pak has also finished second on three different occasions, most recently at last months U.S. Women's Open.
History should be on her side entering Sunday as well, as Pak has won seven of the eight times she has entered the final round of an event with the lead.
Should she hold on for victory Sunday at the Highland Meadows Golf Club, Pak will become the first three-time winner in the tournaments 17-year history.
Full-field scores from the Jamie Farr Kroger Classic