A demanding day trek up Horcones Valley puts you at Confluencia, Aconcagua’s nearest base camp. Expect sweeping high-Andes views, rocky trails, and essential altitude preparation for an 8–12 hour outing.
More ways to explore the area's outdoor wonders
The trail opens with the river's voice — Horcones Creek pushing you upriver through scrub and wind-bent willow to the high plain where Confluencia sits at roughly 3,400 meters. Cold light slices across talus slopes and the southern face of Aconcagua rises like a gray wall ahead, its glaciers and rock bands studying every step.
Difficulty
moderate
Duration
8–12 hours
Fitness Level
Good cardiovascular fitness and experience with sustained day hikes; previous multi-hour uphill hikes recommended
Wildlife
History
Confluencia sits on routes used by early 20th-century expeditions to Aconcagua; the area served as a logistics hub for foreign and local climbers and muleteers.
Conservation
Aconcagua Provincial Park manages visitor impact with regulated access and fees—stick to trails, pack out waste, and follow ranger guidance to protect fragile high-Andes habitats.
Reserve your spot on the Trekking to Confluencia, Aconcagua first base camp today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Acclimatize before the hike
Spend 1–2 days in Mendoza or a nearby higher village to reduce acute altitude effects before ascending to 3,400 m.
Protect from the sun
UV is strong at altitude — use SPF 50+, a brimmed hat, and UV-blocking sunglasses throughout the day.
Carry water and electrolytes
Even in cool weather you’ll sweat at altitude; carry at least 2–3 liters and supplement with electrolyte mixes.
Wear stiff-soled boots
Trail alternates between packed dirt and loose scree — ankle support and firm soles reduce fatigue and risk of rolling an ankle.
Insulated jacket (down or synthetic)
Warmth for the cold, windy plain at 3,400 m and sudden temperature drops.
Sturdy hiking boots
Support for mixed terrain: packed trail, moraine and loose scree.
Sunglasses and high-SPF sunscreen
Protects skin and eyes from intense high-altitude UV exposure.
Hydration system (2–3 L) and electrolytes
Sustains performance and helps prevent altitude-related dehydration.