Last weekend, she won by seven shots at Bayonet Golf Course in Seaside, Calif., shooting a two-day total of 155, which was 11-over par.
New Year’s weekend, she won by six shots at the PGA West Nicklaus and Stadium courses in California, with a two-round total of 2-over par.
In early December she finished second, losing in a playoff to Caroline Inglis of Eugene, after both finished at even par for two rounds at the Mission Hills Resort Pete Dye Course in California.
In November, she was third in a competition at the Duke University Golf Club in North Carolina.
Following her last win, Vaughn was invited to compete in an exclusive tournament next month in Florida, the Annika Invitational, that includes 72 girls from around the world. The three-day tournament is named for Annika Sorenstam, who gives a clinic for tournament participants each year.
Vaughn also is a finalist for the Johnny Carpenter Prep Athlete of the Year award for Class 4A-3A-2A-1A girls in the Oregon Sports Awards. The awards will be presented Jan. 30 at a banquet on the Nike campus in Beaverton.