ACM HotOS 2027 will convene at the remarkable Raitenhaslach Monastery near Burghausen, Germany. Established in the 12th century by Cistercian monks, the monastery has evolved from a place of contemplation into the TUM Science & Study Center Raitenhaslach of the Technical University of Munich. Surrounded by forests and meadows along the Salzach River, the site offers an atmosphere of calm that contrasts beautifully with the nearby historic town. The walk between Raitenhaslach and Burghausen follows a scenic riverside path, inviting participants to enjoy the landscape and continue conversations beyond the formal sessions.