Williams captured the 2015 Middlebury Women's Golf Invitational Tournament after firing a 316 on day two for a total of 642 over the 36-hole event. Amherst (656) finished second, followed by Middlebury (668) and St. Lawrence (678). Middlebury's Katharine Fortin, Williams' Phoebe Mattana and Elzabeth Gudas, along with Devyn Gardner of Amherst all tied for medalist honors with a two-day total of 160. Action took place at the Ralph Myhre Golf Course on the campus of Middlebury College.

Fortin followed up her 82 on day one with a 78 to finish in the four-way tie. Helen Dailey shaved seven strokes off Saturday's score with an 81 to tie for 20th with a 169. Monica Chow came in with a 171 after an 85 to place 25th, Theodora Yoch shot an 85 to tie for 26th with a 172, while Lilia Everson fired an 89 to finish at 173.