The reserve spreads across 121 square kilometers along the north bank of the Lircay, in the Andean skirts above San Clemente. The path in runs through Vilches, a small mountain community of campgrounds, family-run posadas, and a single grocery store that serves as the gateway. This is famously one of the cheapest places in Chile for serious outdoor time. Locals rent simple, good-quality lodging and guide visitors up the trails on foot or horseback, and the welcome is warm enough that many trekkers remember the village as fondly as the summits. Created in 1996, the reserve has become a beloved entry point into the high cordillera.

Long before hikers came for the views, the Pehuenche people lived in these mountains, and the reserve still holds quiet traces of them. Along the trails you can find the piedras de las tazas, large rocks worn with cup-shaped hollows that the Pehuenche used to grind and prepare food. They are easy to walk past and easy to underestimate, but they are the fingerprints of a people who knew this terrain intimately, generations before any park boundary was drawn. To pause at one of these stones is to stand in a working kitchen many centuries old, in the open air of the Andes.

The reserve's forests mix raulí, laurel, cypress, and hualo, and on the long high routes you reach lenga, the southern beech that grows nowhere farther north in Chile. The wildlife is genuinely wild: pumas move through the upper slopes, black woodpeckers hammer the old trunks, and the endangered tricahue parrot brings flashes of color to the canopy. Overhead, Andean condors ride the thermals on wings that can span three meters, scanning the valleys below. Doves, thrushes, eagles, and quail fill in the chorus. This is not a manicured park but a living Andean ecosystem, and it asks to be treated as one.

Reaching El Enladrillado is a commitment: roughly seven kilometers up and a full day on your feet, with the round trip near twenty kilometers, which is why rangers cap entry to the long trails by mid-morning. The reward is enormous. From the plateau, a great chain of volcanoes unfurls, including Descabezado Grande, Cerro Azul, and Quizapú, whose 1932 eruption was among the largest explosive eruptions of the twentieth century, hurling ash as far as Rio de Janeiro. Other trails reach the Laguna del Alto after a steep climb, or follow native forest to the cool Río Claro and the Valle del Venado. Sixty-six kilometers from Talca, mostly paved, this is the high country the city's flatlanders escape to.