Lake Bosque Alegre (, translates to Lake Happy Forest), is a fresh water crater lake located in the northern highlands of Costa Rica. It is part of a complex of lakes that also comprises Lake Hule and Lake Congo. The three lakes are part of the Bosque Alegre Wildlife Refuge.
It is located in Los ÃÂngeles Sur, of RÃÂo Cuarto canton, of Alajuela province.
Lake Bosque Alegre is a maar lake located within a crater, sharing a geological depression with Lake Hule and Lake Congo. There is no secondary volcanic activity present. There is a low possibility of volcanic gas fumes.