Zona de Pesca La Gruta is a free public access point on the shores of Lago Rapel, located near Las Cabras in the O'Higgins Region. It is reached by navigating to the Plaza Gruta de Lourdes de Llallauquén, where free parking is available.

The site remains open to the public without set entry or exit hours. The surrounding plaza area includes an ecological amphitheater, picnic tables with grills, a children's play area, and restroom facilities.

Lago Rapel itself is known locally for fishing, with Argentinian silverside and common carp among the species commonly caught in its waters.