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, 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. The event emphasizes personal challenge over competition, offering finisher certificates, medals, and awards for all registered finishers. It also serves as a qualifier for the 50 States Marathon Club. Visit the organization's website for the most recent information.