Baker Channel, also known as Calen Inlet, is a channel of Chile located in the Aysén del General Carlos Ibáñez del Campo Region. The Baker River discharges into Martinez Inlet, the northern part of this large estuary. It penetrates the mainland about 75 miles (121 km) and opens into Tarn Bay at the south-east corner of the Gulf of Penas. Merino Jarpa Island lies wholly within this great estuary, while at its mouth lies a group of smaller islands, called Baker Islands, which separate it from Messier Channel. Baker Channel also receives the waters of the O'Higgins/San Martín Lake through the Pascua River. The lake's far-reaching fjord-like arms extend approximately from lat. 49° 11' to 48° 22' S.