Green Mountain College joined the North Atlantic Conference, beginning with the 2008-2009 academic year. Green Mountain competes in the NAC in Men's and Women's Soccer, Women's Volleyball, Men's and Women's Cross Country, Men's Golf, Men's and Women's Basketball, Men's and Women's Lacrosse, Men's Tennis, and Softball.

Conference members include Castleton State College (VT), Johnson State College (VT), Lyndon State College (VT), Husson University (ME), Thomas College (ME), Maine Maritime Academy (ME), and University of Maine-Farmington (ME). Associate members in Men's Lacrosse are Emerson, Mt. Ida, and St. Joseph's College (ME).  Cazenovia, College of St. Elizabeth, Keuka, Penn. St-Abington, Wells, Medaille, and Wilson are associate members in Women's Lacrosse.

Conference Philosophy Statement

Consistent with the NCAA Division III philosophy, a basic purpose of this conference is to maintain intercollegiate athletics as an integral part of the educational experience, with the student-athlete as an integral part of the student body. Objectives include:

• Sponsoring and promoting varsity intercollegiate sports in a fiscally prudent and educationally sound manner.
• Upholding the principle of institutional control of, and responsibility for, all intercollegiate sports in conformity of the constitution and by-laws of NCAA Division III.
• Providing equitable athletic opportunities for males and females and giving equal emphasis to all men's and women's sports.
• Promoting the character development of participants, enhancing the integrity of higher education and promoting sportsmanship for our student-athletes, coaches and all others associated with these athletics programs, and
• Protecting the welfare of, and providing a safe environment for, student-athletes.