Patagonia Run 21K is the 21.2km trail race at Patagonia Run 2026 (San Martín de los Andes, Argentina). The race starts on April 8, 2026 at 09:00 AM. It starts and finishes in San Martín de los Andes. The time limit is 8 h.
Run hard on the first mountain, but save energy for the second.
The course climbs 1234m+. With 58m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 33% of the distance is uphill, 34% downhill and 33% flat. The longest climb runs 5.4km at an average 7.2% grade (389m of vertical). The longest descent runs 6.7km at an average 6.5% grade (437m of vertical). The steepest climb averages 24.3% over 0.3km. The steepest descent drops at 28.7% over 0.3km. Flat-equivalent effort: 27.2 FlatKM.
The course is runnable enough that trekking poles are not needed.
Quad damage risk is low (index 14 of 100): a few descents worth noting, none of them decisive.
On race day, start temperatures have historically ranged from 4°C to 12°C, with around 8°C at the highest point; the chance of precipitation is about 33%. Heavy rain of 10.0mm or more falls on about 6% of days around this date.
This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Patagonia Run 21K.
Other distances of Patagonia Run 2026Patagonia Run 100 Miles (160km)·Patagonia Run 110K (107km)·Patagonia Run 70K (71.0km)·Patagonia Run 42K (42.0km)·Patagonia Run 10K (13.0km)
Other editions of Patagonia Run 21K2027
Official websitepatagoniarun.com/en
