Escape Santiago for a private 4x4 into Cajón del Maipo to reach Embalse El Yeso, natural hot springs, and a short high-altitude hike to Los Patos Lagoon. Expect dramatic mountain views, a riverside waterfall, and a mountain-side roast beef picnic.
More ways to explore the area's outdoor wonders
A thin wind pushes through the black rock ribs above the valley as your 4x4 climbs out of Cajón del Maipo, and the city’s hum drops away beneath the mountains. In an hour the road opens to turquoise — Embalse El Yeso — a high-altitude reservoir that looks as if it borrowed its color from the sky. The vehicle grinds up a rugged track; peaks lean in like watchful companions. At 3,200 meters a 50-minute guided hike to Los Patos Lagoon reveals a small watery eye in the high Andes and a waterfall that insists on moving the air.
Difficulty
moderate
Duration
10–12 hours
Fitness Level
Suitable for moderately fit travelers comfortable with a 50-minute uphill hike at high altitude and a long day in a vehicle.
Wildlife
History
Embalse El Yeso was developed as part of 20th-century waterworks supplying Santiago; the valley also holds older transit routes used by indigenous peoples and miners.
Conservation
Alpine soils and springs are fragile—stick to trails, pack out waste, and avoid soaps in hot springs to protect water quality and vegetation.
Reserve your spot on the El Yeso Dam & El Plomo Hot Springs - Los Patos Lagoon (PRIVATE EXCURSION) today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Acclimatize before hiking
Spend a day in Santiago or San José de Maipo to reduce altitude effects; move slowly on the first ascent and stay hydrated.
Wear sturdy boots
Trails to Los Patos are rocky and can be loose; ankle-supporting hiking boots improve safety and comfort.
Sun and wind protection
High-altitude UV is strong—bring SPF50, sunglasses, and a windproof shell for exposed stretches.
Respect hot-spring etiquette
Check temperature and local rules before entering; avoid soaps and stay brief to reduce impact on fragile springs.
Sturdy hiking boots
Protects ankles on loose rock and short steep sections to Los Patos Lagoon.
Layered clothing (insulating mid-layer + wind shell)
Temperatures change quickly between valley and 3,200 m; layers let you adjust.
Sun protection (high-SPF sunscreen, hat, UV sunglasses)
High-altitude UV exposure is intense even on cool days.
summer
1.5–2 L water and high-energy snacks
Hydration and quick calories help mitigate altitude effects and long transit times.