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Patagonia Run
160.3km160.3107.3km107.371km7142km4221.2km21.213km13

Patagonia Run 42K

42.0km·2403m+
April 9, 09:00 AM
San Martín de los Andes,
Argentina
itra·source

Race Pace Calculator · GPX Analyzer · Trail Finder

Patagonia Run 42K · Race profile

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Read

  • How to Taper for a Marathon, Half Marathon or Ultra
  • Types of Runs and What Each Workout Actually Trains
  • Hill Training for Trail Runners: Train the Descents

Distance
42.0km
Gain
2403m+
FlatKM
56.1
Max
1768m
Min
644m
Marathon trail race calendar

About Patagonia Run 42K

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.

Race strategy

Run easy on the first mountain, then go all out on the second.

  • 753m descent. Go easy, save your quads.
  • Steep 33% wall. Control your pace and stay focused.
  • Control your HR on the first mountain, save your quads on the descents until 22.7km, then run your race pace, and go all out on the final descent from 38.1km.
  • Start · 0.0km–2.0km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Settle in · 2.0km–19.8km · Climb of 759m, climb of 727m, high point 1769m. Plus 1 more descent. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace.
  • Work · 19.8km–38.1km · Descent of 753m averaging 26%. This is where the race is built: steady, solid effort. This descent is hard on the legs: short steps, stay in control, poles if you have them. Running pays off here: run wherever you can. Hike the steepest pitches.
  • Home · 38.1km–42.5km · Descent of 328m averaging 7%. No heroics: settle back into your own effort and hold it to the line. Long descent: keep it even and let go only near the end.

Course

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

Poles bring little benefit here: only about 3.4km of pole-friendly terrain.

Quad damage

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.

  • Control your HR on the first mountain, save your quads on the descents until 22.7km, then run your race pace, and go all out on the final descent from 38.1km.
  • #1 · 19.8–22.7 km · 753 m D−, -26.3% · 19.9 km ahead → control
  • 38.1–42.6 km · 328 m D−, -7.4% · 0.0 km ahead → even, let go at the end

Weather

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