Arrowhead 135

The Arrowhead 135 is a grueling 135-mile human-powered ultra marathon held in Northern Minnesota, running from International Falls to Tower along the rugged Arrowhead State Snowmobile Trail. Participants can choose to compete by foot, ski, or bicycle in one of the coldest and most challenging winter endurance races in the lower 48 states. Known for extreme temperatures often dropping to -30 to -40°F and potential snowstorms, the race tests even the toughest athletes.

With a finish rate around 50%, it attracts elite winter ultra-athletes worldwide. The event supports charitable causes and emphasizes a challenging yet educational experience in a remote, scenic winter wilderness. Visit the organization's website for the most recent information.