Half marathonRoad🇬🇺 Tumon, Guam

Guam Ko'ko' Half Marathon

Sunday, 11 April 2027In 6 months · Start 05:00

Guam's signature road race, named after the island's flightless rail bird: an out-and-back from Tumon Bay through the capital Hagåtña to a turnaround in Asan village, finishing at Ypao Beach.

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Facts checked 24 Oct 2026 against visitguam.com, guamsportsnetwork.com.

Elevation gain

60 m

Flat · ↓ 60 m

Start altitude

38 m

above sea level, from terrain data

Temp at start

26°C

Peaks around 29°C

Entry fee

Check site

Open entry

Finishers

—

typical year

Course

Out and back

Cut-off: check site

Getting thereFly into GUM (Hagåtña), about 2 km from the start

Plan your trip to Tumon

Race weekends book up early. Searches are set for the race dates.

Hotels near the start lineSat 10 Apr – Mon 12 Apr · 2 nights · closest to the start firstSee hotels on Booking.com Flights to TumonArrive Fri 9 Apr, fly home Tue 13 AprSee flights on Google Flights

Things to do in TumonKlook Mobile data in GuamAiralo Airport transfer from GUMKiwitaxi

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Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Flat: about 60 m of climbing and 60 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start

26°C

Peak during race

29°C

Humidity

79%

Chance of rain

16%

Wind

17 km/h

11 April in past years

Historical averages for 11 April ±3 days, 2016–2025, from 05:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

Finish times by age group

No data yet. We’re collecting age-group results race by race.

Runner reviews

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

Guides for this race

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Show your runners the course facts and race-day weather. Paste this code into your site; it displays the badge below and links to this page. It updates automatically when the race details change.

<a href="https://irun42.com/race/guam-koko-half" title="Guam Ko'ko' Half Marathon on iRun42"><img src="https://irun42.com/badge/guam-koko-half.svg" width="300" height="120" alt="Guam Ko'ko' Half Marathon: course, elevation and race-day weather on iRun42" /></a>

Around the same time

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