The 2010 Arrowhead 135 mile event was the first Monday of February 1st through Wednesday the 3rd.
Bike, foot or ski. The 2010 event took place in a mass start at 7:03 am Monday on the Blue Ox trail/Arrowhead trailhead in downtown International Falls, MN USA aka “Frostbite Falls”. The Nations Icebox.
Temps at the start in 2010 were pretty darn cold, -21F at start, maybe near 0F midday, dropped to -20F degrees at dusk on the trail. The wind was calm and the moon close to full. Wolf spectators were watching on the trail. Racers and sled drivers spotted a huge wolf standing on the trail, the leaders had and injured wolf jogging ahead on the trail for 10-15 minutes or so about mid-race.
Of 102 starters, a record 61 finishers under 60 hours. Apparently it was too easy.