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Above 3,900 meters a mineral-bright stream slices the Andes into turquoise. This guided trek from Barreal reaches Arroyo Turquesa and a camp on Mercedario’s lower slopes, combining glacier views, high-desert travel, and real mountain work.
Above 3,900 meters a mineral-bright stream slices the Andes into turquoise. This guided trek from Barreal reaches Arroyo Turquesa and a camp on Mercedario’s lower slopes, combining glacier views, high-desert travel, and real mountain work.
Verified experiences and guided adventures in the surrounding area.
Operated by Posta Inca Adventures Expeditions · Barreal, San Juan
The air thins and a color appears — an impossible turquoise cutting through scree and ice. On the approach to Arroyo Turquesa you trade eucalyptus and scrub for gravel flats and the metallic hiss of meltwater. Guides slow the group to one steady beat, boots kicking a soft, mineral-rich dust that gives the creek its unusual hue. Above 3,900 meters the Andes take on a different character: glaciers hang like folded cloth from steep ridges, and Mercedario, towering at 6,770 meters, keeps a slow, austere watch.
challenging.
3 days (≈72 hours).
High — regular hikers who train at elevation or do sustained aerobic work will be comfortable
The route reaches and operates above 3,900 meters; camps are established on Mercedario’s lower slopes with glacier views.
No technical climbing is required, but previous high-altitude trekking and good fitness are essential.
Private transportation, meals (breakfast, lunch, dinner), snacks, tents, kitchen equipment, and a first-aid kit are typically provided.
This activity is not recommended for pregnant travelers or people with significant cardiovascular or spinal problems.
Basic campsite equipment is supplied, but bring personal items like a sleeping liner, warm layers, and footwear.
The dry season (austral spring to early fall) offers more stable weather; avoid peak storm months during the austral winter.
Miners and local communities have influenced river courses and trails for generations; remnants of mining activity helped create the creek’s unusual colors.
This high-altitude environment recovers slowly from disturbance—stick to established campsites, pack out waste, and avoid moving stones or plants.
Posta Inca Adventures Expeditions operates guided outdoor trips and adventures with an emphasis on safety, stewardship, and memorable experiences.
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