The Marin and Novato Ys serve communities from Sausalito to Novato and all areas in between. We are a volunteer-driven organization that strives to fulfill our mission.The Marin YMCA builds strong kids, strong families and strong communities by enriching the lives of all people in spirit, mind and body. Join the Marin YMCA for fitness, swimming, child care, camp and family programs. Exercise in our gym, aerobic studio and pools. Volunteer with the Marin YMCA! Every day children and teens lives are changed through the support and comfort of their local volunteers and mentors. At the Y, everyone is welcome.