Patagonia Run 42K is the 42.0km trail race at Patagonia Run 2026 (San Martín de los Andes, Argentina). The race starts on April 9, 2026 at 09:00 AM. It starts and finishes in San Martín de los Andes. The time limit is 10 h 30 min.
Run easy on the first mountain, then go all out on the second.
The course climbs 2403m+. With 57m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 38% of the distance is uphill, 30% downhill and 32% flat. The longest climb runs 9.5km at an average 8.0% grade (759m of vertical). The longest descent runs 4.4km at an average 7.4% grade (328m of vertical). The steepest climb averages 24.3% over 0.3km. The steepest descent drops at 37.7% over 1.0km. Flat-equivalent effort: 56.1 FlatKM.
Poles bring little benefit here: only about 3.4km of pole-friendly terrain.
Quad damage risk is moderate (index 24 of 100), with 50% of the load in the first half: 1 descent deserves a plan and a couple of downhill sessions before race day.
On race day, start temperatures have historically ranged from 4°C to 11°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 7% 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 42K.
Other distances of Patagonia Run 2026Patagonia Run 100 Miles (160km)·Patagonia Run 110K (107km)·Patagonia Run 70K (71.0km)·Patagonia Run 21K (21.2km)·Patagonia Run 10K (13.0km)
Other editions of Patagonia Run 42K2027
Official websitepatagoniarun.com/en