HURT 100 is a 100 miles ultra marathon in Honolulu, United States. Distance: 161km. Elevation: 7,500m D+. Difficulty: brutal (Challenge Rating 64/100). DNF rate: 50%. Time limit: 36h. Surface: trail. Established 2001.
HURT 100
Honolulu, Hawaii, United States
"100 miles of tropical suffering in Hawaii — five loops of relentless mud, roots, and 50% DNF rate."
One of the toughest 100-milers on Earth — five muddy loops through Hawaiian jungle with 7500m of climbing and a legendary 50% DNF rate.
The Course
Five 20-mile loops through the tropical mountains behind Honolulu on Oahu. The course traverses ridgelines, bamboo forests, stream crossings, and technical rooty singletrack in Hawaii's Ko'olau Range. Relentlessly steep and muddy. Known as one of the muddiest 100s in the world.
mountainous
multi-loop
3
820m
Runner Experience
Standard aid station support with food, drinks, and basic medical assistance at regular intervals.
Warm, inclusive finish line with a strong community feel. Runners celebrate together regardless of finish time.
Race Day Weather
24°C
20° – 28°
85%
70%
Tropical Hawaiian winter. Warm and very humid. Rain frequent and heavy. Trails turn to mud within minutes of rainfall.
Stats & Records
2001
50
33:00:00
19:31:42
Nick Coury (2023)
24:12:33
Darcy Africa (2019)
Entry
$225
May
weeks
Lore & Trivia
HURT 100 (Hawaiian Ultra Running Team's 100-mile endurance run) circles the mountains above Honolulu through the Ko'olau Range on the island of O'ahu. Five 20-mile loops through tropical rainforest on terrain so muddy, rooty, and steep that running is often impossible — runners slide down slopes gripping tree roots, wade through knee-deep mud, and climb sections so vertical they're essentially scrambling. The humidity is overwhelming: 80-100% moisture content in air that feels like breathing through a wet towel. HURT is considered one of the hardest 100-milers in America, with DNF rates regularly exceeding 50%. The reward is running through one of the most lush, dramatic landscapes in ultrarunning — ferns taller than houses, waterfalls hidden in jungle ravines, and ridgeline views of the Pacific.
- ▸ Five 20-mile loops through the Ko'olau Range above Honolulu.
- ▸ DNF rate regularly exceeds 50% — one of America's toughest 100-milers.
- ▸ 80-100% humidity in tropical rainforest.
- ▸ Runners wade through knee-deep mud on near-vertical slopes.
- ▸ The course gains roughly 7,500m over 100 miles.
- ▸ Ridgeline views of the Pacific Ocean and Honolulu skyline.
- ▸ Run in January — Hawaii's "wet season" amplifies the already-extreme mud.
- ▸ Founded by the Hawaiian Ultra Running Team (HURT) in 1996.
HURT isn't muddy. Mud implies there's solid ground underneath. At HURT, the ground is just thicker mud.
Notable Editions
Sub-20 Finally Falls
The HURT 100 sub-20-hour barrier was finally broken, a milestone that had seemed impossible given the technical terrain and relentless humidity. The achievement required not just fitness but a deep familiarity with the specific challenges of Hawaiian mountain running.
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Frequently Asked Questions
How long is HURT 100? +
HURT 100 is a 100 miles (161km) ultra marathon with 7,500m of elevation gain. The course is multi-loop on trail terrain.
How hard is HURT 100? +
HURT 100 is rated brutal with a Challenge Rating of 64/100 (Demanding). The DNF rate is 50%. Runners have 36 hours to finish.
How do I enter HURT 100? +
Entry is by lottery. An application or essay is required. Entry costs $225. with a maximum of 100 starters.
What is the weather like at HURT 100? +
Average temperature is 24°C (range 20°C to 28°C) with 85% humidity and a 70% chance of rain. Tropical Hawaiian winter. Warm and very humid. Rain frequent and heavy. Trails turn to mud within minutes of rainfall.
Are crew and pacers allowed at HURT 100? +
Crew access is allowed. Pacers are allowed after 60km.
What is the course record for HURT 100? +
The men's course record is 19:31:42 set by Nick Coury in 2023. The women's course record is 24:12:33 set by Darcy Africa in 2019.
What is the average finish time for HURT 100? +
The average finish time is 33:00:00. About 50 runners finish each year. The DNF rate is 50%.
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