Hawaii's notorious 100-miler through the Ko'olau Range on Oahu. Five 20-mile loops of extreme mud, roots, humidity, and technical jungle trail. One of the toughest 100s in the world despite low elevation.
Aid Stations
Name
Mile
Elevation
Crew Access
Drop Bag
Cutoff
Nature Center (loop start)
0
600 ft
Yes
Yes
—
Jackass Ginger
5
800 ft
No
No
—
Nuuanu
10
1,200 ft
No
No
—
Paradise Park
15
1,800 ft
No
No
—
Course Segments
Segment
Miles
Terrain
Difficulty
Notes
Each 20-mile loop
0–20
technical
extreme
5 loops. Expect mud, roots, ropes, and humidity. Headlamp essential.
View the full interactive elevation profile, 3D course flyover, and race strategy tools on HARDN.