The Molawin River, also referred to as the Molawin Creek, is one of the many low volume flowing rocky streams crisscrossing the campus of the University of the Philippines Los Baños and some areas of the town of Los Baños. Molawin Creek crosses the whole of the UPLB campus and essentially cuts it in half making it necessary to construct several bridges throughout the University's history to improve the campus' integrity and general accessibility. Volume of flow depends on the average rainfall of the season and develops into a raging river during typhoons or heavy rainfall. It is a minor tributary of Laguna Lake, one among many small creeks that empty into Laguna de Bay. The origins of Molawin Creek and the other creeks in Los Baños have not been pinpointed but are generally accepted to have their origins high up in Mount Makiling. The name Molawin is a local variation of the name of the Molave tree (Vitex parviflora).