Hawaii Kai Ultra Run - Xtreme

The Hawaii Kai Ultra Run - XTreme is a semi-annual ultramarathon event held near Sandy Beach at the east end of Oahu, Hawaii, approximately 30 minutes from Waikiki. Participants can choose from multiple distances including Half Marathon, 30K, Marathon, 50K, 50 Miles, 100K, and 100 Miles. The XTreme course features a challenging 9-mile loop that includes Heartbreak Hill and runs through Hawaii Kai neighborhoods, with aid stations spaced about 2.5 miles apart.

Runners have flexible start times over two days, with options for wave starts or self-timed starts, emphasizing a personal challenge rather than a race. Finishers receive certificates, medals, and can purchase commemorative shirts. The event qualifies for the 50 States Marathon Club. Visit the organization's website for the most recent information.