The north side of Snow Mountain drains into Indian Stream, then into Chain of Ponds, the North Branch of the Dead River, Flagstaff Lake, the Dead River, the Kennebec River, and into the Gulf of Maine.
Snow Mountain's northern aspect discharges into Indian Stream, which then merges with Chain of Ponds, the North Branch of the Dead River, Flagstaff Lake, the Dead River, the Kennebec River, and finally empties into the Gulf of Maine.