The Chagres River in central Panama is the largest river in the Panama Canals watershed. The river is dammed twice, and the resulting reservoirs, Gatun Lake and Lake Alajuela, that form an integral part of the canal and its water system. Although the rivers natural course runs northwest to its mouth at the Caribbean Sea, its waters also flow, via the canals locks, into the Gulf of Panama to the south. The Chagres thus has the unusual claim of drainage into two oceans.
