On 20–21 December 2025, the Hawaii Kai Ultra Run (HKUR) returns at Kalama Valley Park in Honolulu’s Hawaii Kai community. The event offers a wide range of distances — ½ marathon (21.1 km), 30 km, marathon (42.2 km), 50 km, 50 miles, 100 km, and 100 miles — all run on a 3.34-mile paved loop circling the valley streets near Sandy Beach. The flexible format allows wave starts or self-timed participation up until noon Sunday, with runners supported by aid tents, hydration, ice, and snacks every loop. Restrooms and shaded areas are available at the park, while the event emphasizes sustainability with reusable-cup practices. All finishers receive certificates or medals, and the event is recognized by groups like the 50 States Marathon Club.
Races
100 miles
100 km
50 km
Marathon
Half Marathon
The 100-mile Ultra of the Hawaii Kai Ultra Run – Kalama Valley, run by the Hawaii Running Project, takes place on December 20-21, 2025 in Kalama Valley Park, Hawaii Kai, Honolulu, HI, offering the ultimate looped endurance challenge in the event.
The 100 km Race at the Hawaii Kai Ultra Run – Kalama Valley, organized by the Hawaii Running Project, is held on December 20-21, 2025 at Kalama Valley Park, Hawaii Kai, Honolulu, HI, featuring endurance laps on the looped course.
The 50 km Race of the Hawaii Kai Ultra Run – Kalama Valley, by the Hawaii Running Project, is scheduled for December 20-21, 2025 at Kalama Valley Park, Hawaii Kai, Honolulu, HI, with all distances utilizing the 3.34-mile loop circuit.
The Hawaii Kai Ultra Run – Kalama Valley Marathon, under the Hawaii Running Project’s event, is held on December 20-21, 2025 in Kalama Valley Park, Hawaii Kai, Honolulu, HI, with a multiple-loop course allowing flexible start times.
The Hawaii Kai Ultra Run Half Marathon will be held on Saturday, 20 December 2025 in Kalama Valley Park, 555 Kealahou St, Honolulu, Hawaii, USA, with a flexible start from early morning on a 3.34-mile loop course.
Weather based on historical averages.
FAQs
What is the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
How long is the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
Where does the Hawaii Kai Ultra Run Kalama Valley 100 Miles take place?
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
The 100-mile Ultra of the Hawaii Kai Ultra Run – Kalama Valley, run by the Hawaii Running Project, takes place on December 20-21, 2025 in Kalama Valley Park, Hawaii Kai, Honolulu, HI, offering the ultimate looped endurance challenge in the event.
The Hawaii Kai Ultra Run Kalama Valley 100 Miles is 161km long.
The Hawaii Kai Ultra Run Kalama Valley 100 Miles takes place in Honolulu, HI, USA.
Runna classifies the Hawaii Kai Ultra Run Kalama Valley 100 Miles elevation profile as Rolling.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
The 100-mile Ultra of the Hawaii Kai Ultra Run – Kalama Valley, run by the Hawaii Running Project, takes place on December 20-21, 2025 in Kalama Valley Park, Hawaii Kai, Honolulu, HI, offering the ultimate looped endurance challenge in the event.
How long is the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
The Hawaii Kai Ultra Run Kalama Valley 100 Miles is 161km long.
Where does the Hawaii Kai Ultra Run Kalama Valley 100 Miles take place?
The Hawaii Kai Ultra Run Kalama Valley 100 Miles takes place in Honolulu, HI, USA.
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
Runna classifies the Hawaii Kai Ultra Run Kalama Valley 100 Miles elevation profile as Rolling.
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley 100 Miles?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hawaii Kai Ultra Run Kalama Valley 100K?
How long is the Hawaii Kai Ultra Run Kalama Valley 100K?
Where does the Hawaii Kai Ultra Run Kalama Valley 100K take place?
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley 100K?
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley 100K?
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley 100K?
The 100 km Race at the Hawaii Kai Ultra Run – Kalama Valley, organized by the Hawaii Running Project, is held on December 20-21, 2025 at Kalama Valley Park, Hawaii Kai, Honolulu, HI, featuring endurance laps on the looped course.
The Hawaii Kai Ultra Run Kalama Valley 100K is 100km long.
The Hawaii Kai Ultra Run Kalama Valley 100K takes place in Honolulu, HI, USA.
Runna classifies the Hawaii Kai Ultra Run Kalama Valley 100K elevation profile as Rolling.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hawaii Kai Ultra Run Kalama Valley 100K?
The 100 km Race at the Hawaii Kai Ultra Run – Kalama Valley, organized by the Hawaii Running Project, is held on December 20-21, 2025 at Kalama Valley Park, Hawaii Kai, Honolulu, HI, featuring endurance laps on the looped course.
How long is the Hawaii Kai Ultra Run Kalama Valley 100K?
The Hawaii Kai Ultra Run Kalama Valley 100K is 100km long.
Where does the Hawaii Kai Ultra Run Kalama Valley 100K take place?
The Hawaii Kai Ultra Run Kalama Valley 100K takes place in Honolulu, HI, USA.
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley 100K?
Runna classifies the Hawaii Kai Ultra Run Kalama Valley 100K elevation profile as Rolling.
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley 100K?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley 100K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hawaii Kai Ultra Run Kalama Valley 50K?
How long is the Hawaii Kai Ultra Run Kalama Valley 50K?
Where does the Hawaii Kai Ultra Run Kalama Valley 50K take place?
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley 50K?
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley 50K?
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley 50K?
The 50 km Race of the Hawaii Kai Ultra Run – Kalama Valley, by the Hawaii Running Project, is scheduled for December 20-21, 2025 at Kalama Valley Park, Hawaii Kai, Honolulu, HI, with all distances utilizing the 3.34-mile loop circuit.
The Hawaii Kai Ultra Run Kalama Valley 50K is 50km long.
The Hawaii Kai Ultra Run Kalama Valley 50K takes place in Honolulu, HI, USA.
Runna classifies the Hawaii Kai Ultra Run Kalama Valley 50K elevation profile as Rolling.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hawaii Kai Ultra Run Kalama Valley 50K?
The 50 km Race of the Hawaii Kai Ultra Run – Kalama Valley, by the Hawaii Running Project, is scheduled for December 20-21, 2025 at Kalama Valley Park, Hawaii Kai, Honolulu, HI, with all distances utilizing the 3.34-mile loop circuit.
How long is the Hawaii Kai Ultra Run Kalama Valley 50K?
The Hawaii Kai Ultra Run Kalama Valley 50K is 50km long.
Where does the Hawaii Kai Ultra Run Kalama Valley 50K take place?
The Hawaii Kai Ultra Run Kalama Valley 50K takes place in Honolulu, HI, USA.
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley 50K?
Runna classifies the Hawaii Kai Ultra Run Kalama Valley 50K elevation profile as Rolling.
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley 50K?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley 50K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hawaii Kai Ultra Run Kalama Valley Marathon?
How long is the Hawaii Kai Ultra Run Kalama Valley Marathon?
Where does the Hawaii Kai Ultra Run Kalama Valley Marathon take place?
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley Marathon?
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley Marathon?
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley Marathon?
The Hawaii Kai Ultra Run – Kalama Valley Marathon, under the Hawaii Running Project’s event, is held on December 20-21, 2025 in Kalama Valley Park, Hawaii Kai, Honolulu, HI, with a multiple-loop course allowing flexible start times.
The Hawaii Kai Ultra Run Kalama Valley Marathon is 42km long.
The Hawaii Kai Ultra Run Kalama Valley Marathon takes place in Honolulu, HI, USA.
Runna classifies the Hawaii Kai Ultra Run Kalama Valley Marathon elevation profile as Rolling.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hawaii Kai Ultra Run Kalama Valley Marathon?
The Hawaii Kai Ultra Run – Kalama Valley Marathon, under the Hawaii Running Project’s event, is held on December 20-21, 2025 in Kalama Valley Park, Hawaii Kai, Honolulu, HI, with a multiple-loop course allowing flexible start times.
How long is the Hawaii Kai Ultra Run Kalama Valley Marathon?
The Hawaii Kai Ultra Run Kalama Valley Marathon is 42km long.
Where does the Hawaii Kai Ultra Run Kalama Valley Marathon take place?
The Hawaii Kai Ultra Run Kalama Valley Marathon takes place in Honolulu, HI, USA.
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley Marathon?
Runna classifies the Hawaii Kai Ultra Run Kalama Valley Marathon elevation profile as Rolling.
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley Marathon?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
How long is the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
Where does the Hawaii Kai Ultra Run Kalama Valley Half Marathon take place?
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
The Hawaii Kai Ultra Run Half Marathon will be held on Saturday, 20 December 2025 in Kalama Valley Park, 555 Kealahou St, Honolulu, Hawaii, USA, with a flexible start from early morning on a 3.34-mile loop course.
The Hawaii Kai Ultra Run Kalama Valley Half Marathon is 21km long.
The Hawaii Kai Ultra Run Kalama Valley Half Marathon takes place in Honolulu, HI, USA.
Runna classifies the Hawaii Kai Ultra Run Kalama Valley Half Marathon elevation profile as Rolling.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
The Hawaii Kai Ultra Run Half Marathon will be held on Saturday, 20 December 2025 in Kalama Valley Park, 555 Kealahou St, Honolulu, Hawaii, USA, with a flexible start from early morning on a 3.34-mile loop course.
How long is the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
The Hawaii Kai Ultra Run Kalama Valley Half Marathon is 21km long.
Where does the Hawaii Kai Ultra Run Kalama Valley Half Marathon take place?
The Hawaii Kai Ultra Run Kalama Valley Half Marathon takes place in Honolulu, HI, USA.
What is the elevation gain of the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
Runna classifies the Hawaii Kai Ultra Run Kalama Valley Half Marathon elevation profile as Rolling.
How can I prepare for the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Hawaii Kai Ultra Run Kalama Valley Half Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
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Sport:
Running
Tags:
Coastal
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Hawaii Kai Ultra Run - Kalama Valley or Hawaii Running Project. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Hawaii Kai Ultra Run - Kalama Valley website.
