The Cajon del Maipo is a deep Andean canyon barely an hour southeast of Santiago — close enough for a day trip but wild enough to feel like a different country. The Rio Maipo has carved a valley through the cordillera, and the road follows it upstream past vineyards, hot springs, and increasingly dramatic mountain scenery until it dead-ends near the Argentine border at 3,000 meters.
Embalse El Yeso
The turquoise reservoir at the head of the valley is the most visited spot — an artificial lake at 2,500 meters surrounded by snow-capped peaks. The color comes from glacial sediment suspended in the water. It photographs well and is accessible by car, though the last 20 kilometers are unpaved. Go on a weekday if you can — weekends draw crowds from Santiago.
San Jose de Maipo
The main town in the canyon, about 45 minutes from Santiago. A quiet colonial-era settlement with a plaza, a church, and a handful of restaurants serving traditional Chilean food. It makes a good lunch stop and the starting point for exploring deeper into the valley. The Saturday market sells local honey, cheese, and preserved fruits.
Hot Springs
Baños Morales: Natural hot springs in a small village at 1,850 meters, about 90 minutes from Santiago. Basic stone pools with warm mineral water and mountain views. The road up is steep and unpaved — high clearance recommended. A few families in the village rent rooms and serve meals.
Baños Colina: Higher up at 2,600 meters, a series of terraced hot pools carved into a hillside above a river. The setting is spectacular — volcanic terrain, steaming pools, and Andean peaks in every direction. Access requires a 4WD vehicle or a tour from Santiago. Open roughly October through April depending on snow.
Outdoor Activities
Rafting: The Rio Maipo has Class III-IV rapids from September through January when snowmelt raises the water level. Several operators run half-day trips from San Jose de Maipo. Cascada de las Animas is the most established outfitter.
Hiking: Trails range from easy riverside walks near San Jose to serious mountain routes toward the Argentine border. The Monumento Natural El Morado trail leads to a glacier at the head of a side valley — a full day, moderate difficulty, stunning payoff.
Rock climbing: The canyon walls offer sport climbing routes at various crags between San Jose and San Alfonso. The local climbing community is active and routes are well-documented online.
Wine
The lower reaches of the canyon — between Santiago and San Jose — have small vineyards that benefit from the altitude and temperature swings. A few boutique wineries are open for tastings. The combination of morning wine tasting and afternoon hot springs makes for a good day trip.
Practical Information
Getting there: Drive from Santiago — about 1 hour to San Jose de Maipo, 2 hours to Embalse El Yeso. Public buses run from Metro Baquedano to San Jose but getting further up the valley without a car is difficult. Tour operators in Santiago run day trips to Embalse El Yeso and the hot springs for $40-60 per person.
When to go: October through April for hot springs and hiking. The road to Baños Colina and Embalse El Yeso closes in winter due to snow. Rafting season peaks November through January.
Altitude: The upper valley reaches 2,500-3,000 meters. Visitors coming directly from sea-level Santiago may feel mild effects. Take it easy, drink water, and avoid vigorous activity on your first hour at altitude.