A full‑day guided hike from Santiago to a private Mesón Alto viewpoint above El Yeso Reservoir. Short steep climbs, high‑altitude plateaus and a gourmet box lunch combine for a panoramic Andean day trip.
More ways to explore the area's outdoor wonders
A thin mountain light cuts across the reservoir as the vehicle eases up from Casa Bosque and the city’s hum falls away. You step out at the trailhead into cold, dry air; a steep twenty-minute pitch swallows your breath and then opens onto a broad plateau where the Mesón Alto glacier and the turquoise spill of El Yeso sit like a folded map below.
Difficulty
challenging
Duration
12 hours
Fitness Level
Good cardiovascular fitness recommended; comfortable with continuous hiking at high elevation and brief steep sections
Wildlife
History
El Yeso Reservoir was constructed as part of mid‑20th century water infrastructure for Santiago; the Maipo Canyon around it has long histories of mining, agriculture and mountain travel.
Conservation
The Maipo watershed is crucial for Santiago’s water supply; visitors are encouraged to pack out all waste and follow guide instructions to minimize impact on fragile high‑altitude soils.
Reserve your spot on the Hiking Meson Alto El Yeso Reservoir from Santiago today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Acclimate before you go
Spend a day in Santiago at lower exertion to reduce altitude fatigue — the route tops near 3,000 m.
Bring sun protection
High altitude + reflective water increases UV exposure — use broad-spectrum sunscreen, sunglasses and a hat.
Use trekking poles
Poles (often provided) ease the initial steep pitch and stabilize you on loose, gravelly plateaus.
Hydrate and pace
Sip water regularly and set an easy pace on the ascent to manage breathlessness and prevent headaches.
Sturdy hiking boots
Support and traction for steep pitches and loose gravel on the plateau.
Layered insulation (fleece + wind shell)
Wind and sun create large temperature swings—layers let you adjust quickly.
Sun protection (sunglasses, sunscreen, hat)
High UV at altitude and reflection from the reservoir increase sun exposure risk.
summer
Daypack with 2–3L water
Hydration and space for snacks, camera, and extra layers on a full‑day outing.