Running
135 miles
217 km
Start: Jan 27, 05:00 PM
Arrowhead Ultra 135
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Road runs in United States, International Falls
Distances
About
A 135-mile winter ultra across northern Minnesota featuring extreme endurance, solitude, and survival conditions.
Catering & aid stations
Aid stations along the course provide food and drink; specific menu and station locations are detailed in the course description and race materials.
Pacers
Pacemaker information and target times per start wave are available on the race schedule page under 'Renntag für Laufende'. Pacers set target times to help runners manage effort and ensure safe, supported pacing.
Results
View official resultsSurface mix
- 100% asphalt
Typical weather in International Falls
Monthly averages based on historical data (2000–present).
Jan15°0°
↑ 08:02
↓ 16:45
Feb19°2°
↑ 07:23
↓ 17:34
Mar33°16°
↑ 07:27
↓ 19:20
Apr47°29°
↑ 06:23
↓ 20:05
May61°42°
↑ 05:33
↓ 20:49
Jun71°54°
↑ 05:12
↓ 21:19
Jul77°61°
↑ 05:28
↓ 21:12
Aug74°59°
↑ 06:09
↓ 20:29
Sep67°52°
↑ 06:52
↓ 19:27
Oct51°39°
↑ 07:35
↓ 18:25
Nov35°25°
↑ 07:23
↓ 16:35
Dec20°7°
↑ 08:01
↓ 16:19
What's included in entry
- Satellite tracker required; rental available
- Course aid stations with food and drink
- Limited support vehicle access on designated road sections
FAQ
What are the registration dates and deadlines?
Registration opens at 8 am Central time on September 1 each year; early registration is strongly recommended as spots are limited.
What qualifies me to enter?
Proof of a qualifying ultra (100 miles foot, 100 miles off-road, 200 miles road for riders, or 100 miles skiing) is required; training alternatives may be considered.
What gear checks are required?
A clear Melgeorge drop bag with only food and drink will be inspected at gear check; pre-registration tracking activation is mandatory.
Last updated: Jun 6, 2026, 12:26:20 AM
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