Under the Moon
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Under the Moon - August 1, 2026
Under the Moon is an organized running event in Hilo, HI presented by Hawaii Mountain Running. The event uses a point-to-point route from Hilo to Waimea and offers multiple race options.
- 100K
- 100 K Relay
- 50K
- 50 K Relay
- 25 K Relay
- 25K
The course is 100 percent pavement and follows Saddle Road for much of the route. The 100K contains most of its elevation gain in the first half with approximately 7,500 feet of climbing and 5,000 feet of descent. The 50K shows about 700 feet of climb and 5,000 feet of descent. The 25K has almost 3,000 feet of descent.
Check-in occurs at several locations including the KTA parking lot at 50 E Puainako St., the Puu Huluhulu Cinder Cone Parking Lot, and Kilohana Hunters Station.
This is a self-supported event. Runners must provide their own water and food drops or crew support. Crews and relay exchanges must pull completely off the roadway to allow other traffic and runners to pass. Teams that block the road while swapping runners will be disqualified. Runners are responsible for removing all supplies and trash from the course and for returning from the finish area back to the start or other points listed.
There is a 19 hour overall time limit for the 100K with an intermediate requirement to reach the top of Saddle Road by Mauna Kea Recreation area. The 50K and 25K use a midday cutoff and an early start may be arranged with the race director. Reflective apparel and lights are required. Temperatures may range from the low 40s with wind and rain to the mid 80s, and runners are responsible for their warmth and well being. Visit the organization's website for the most recent information.
