Camping Ranchillo is a CONAF-managed campground located within the Reserva Nacional Río de Los Cipreses, in the comuna of Machalí, Provincia de Cachapoal, O'Higgins Region.

The reserve sits roughly 80 kilometers east of Rancagua, accessed via the carretera del Cobre through Coya and across the río Cachapoal at Puente Chacayes.

The access road is gravel and requires at least a high-clearance two-wheel-drive vehicle; there is no cell service on site. The Ranchillo sector offers 35 campsites, each accommodating up to seven people.

A rustic swimming hole is available for recreational bathing, and the area provides direct access to inclusive hiking trails. The nearby Los Peumos trail leads through small forests, remnants of old mining activity, and waterfalls.

No electrical hookups are available. The best camping season runs from October through April, and reservations are required.