The lake is fed by the same springs which give the school its name. Not only does the lake provide a beautiful backdrop to the classroom area, but it also affords many options for recreational use. A walk around the lake offers the opportunity for silent mediation or even a brisk jog if one wanders too close to a swan's territory. There are several canoes and a raft from which students and alumni can peer into the clear spring water and observe the rocky bottom. At the far end of the lake near the Hut, there is a sandy beach and swimming area.
Students often enjoy splashing around in the cool water or sun bathing on the raft.