2025 Hawaii Kai Ultra Run - Kalama Valley

The 2025 Hawaii Kai Ultra Run returns to Kalama Valley Park in Honolulu on December 20–21, 2025, marking an exciting addition to the local running calendar just one week after the Honolulu Marathon. Located at 555 Kealahou St in Honolulu, Hawaii, this two-day event showcases the scenic beauty of Kalama Valley while offering multiple distance options for runners of all levels. December in Honolulu typically features mild temperatures ranging from 70–80°F (21–27°C) with relatively low rainfall, creating favorable conditions for long-distance running. Participants can expect clear morning skies ideal for early starts, with potential afternoon warmth as the day progresses. The event operates on a 3.34-mile loop format with clearly marked turnaround points, allowing runners to customize their experience across seven distance categories while remaining on a manageable, scenic course.

What distances are available for this event?

• →Half Marathon
• →30K
• →Marathon
• →50K
• →50 Miles
• →100K
• →100 Miles

How does the course loop system work?

The event features a 3.34-mile loop with clear turnaround points. Runners complete multiple loops to reach their target distance, with three loops equaling 10 miles. This design provides a predictable, scenic route through Kalama Valley with well-marked sections for runner safety and navigation.

What are the start time options?

Corral wave starts are available for Half Marathon, 30K, and Marathon distances on:

• →Saturday, December 20 at 6:00 AM
• →Saturday, December 20 at 7:00 PM
• →Sunday, December 21 at 6:00 AM

Runners may also start anytime after 3:00 AM on either day, provided they begin before noon on Sunday.

Are there time cutoffs for finishing?

There is no official cutoff time if you start before noon on Saturday and remain on the course. This policy accommodates ultra-distance runners and those seeking a more leisurely pace through the scenic valley.

How much does registration cost?

• →Early registration: $30–$45 depending on distance (before December 1, 2025)
• →Standard registration: $35–$50 depending on distance (December 1–21, 2025)
• →Registration closes December 21, 2025 at 10:30 AM HST

What hydration and nutrition support is available on course?

Water, ice, and snacks are provided at the Start/Finish tent throughout the event. Runners are encouraged to bring reusable water bottles to support the event's sustainability initiatives and reduce single-use plastics.

What facilities are available at the venue?

Public restrooms are available 24 hours at the Start/Finish area, ensuring facilities are accessible throughout both race days and early morning hours for all participants.

What do finishers receive?

All race finishers receive:

• →Finisher certificate
• →Medal
• →Event sticker

Are finisher shirts included in registration?

Finisher shirts are not included in the registration fee but are available for purchase:

• →$25 if pre-ordered by December 1, 2025
• →$30 if purchased on race day (limited supply available)

What additional merchandise is offered?

Beyond finisher shirts, HKUR merchandise is available through the event store, offering participants opportunities to purchase commemorative items and branded gear.

How does this event relate to the 50 States Marathon Club?

The 2025 Hawaii Kai Ultra Run is recognized as an official event that counts toward 50 States Marathon Club totals, making it a valuable opportunity for runners pursuing their 50-state marathon completion goals.

What qualifies runners for HURT races?

Completing the 50 Miles, 100K, or 100 Miles distance at this event qualifies runners for HURT races (Hawaii Ultra Running Team events). Qualified runners receive wave start timing privileges for these subsequent races.

What transportation options are available?

Bus Route #23 provides public transit access, with a stop located directly across from the check-in tent, offering an alternative to personal vehicle transportation.

What is the event's sustainability focus?

The event emphasizes environmental responsibility and aims to become completely "cupless" by 2026, encouraging participants to bring reusable water bottles and reducing single-use plastic waste throughout the event.

Are special accommodations available for participants?

Special hotel rates are offered at Queen Kapiolani Hotel for event participants. Interested runners should contact the event organizers for the participant discount code.