Entry Info

The Hiroshima Ultra-Trail by UTMB® is a trail running race that takes place over an extended period in mountainous terrain. For all race categories —100K, 50K, and 25K—participants must fully understand the nature of this event before entering.

Participants must possess the physical fitness, technical skills, equipment, and judgment necessary to safely complete the race category for which they have registered, as well as the ability to ensure their own safety.

The course includes forest trails, narrow mountain paths, steep slopes, rocky terrain, uneven ground, stairs, and unpaved roads. Additionally, cell phone reception may be unreliable in some sections, which could delay rescue efforts or medical assistance.

Participants must fully understand the unique nature of the event and possess the ability to make their own judgments and respond appropriately to various physical and mental risks that may arise during the race, such as sudden changes in weather, hypothermia, heatstroke, fatigue, dehydration, injury, and running at night.

Furthermore, please understand that trail running is a sport based on the principle of personal responsibility, and participate while properly managing your own health and physical condition. If you determine that continuing the race is dangerous due to illness, injury, or other reasons, please withdraw from the race of your own accord and promptly notify event staff.

Please note that the HIROSHIMA 100K is highly likely to include night running; for safety reasons, we strongly recommend that you practice night running using a headlamp or similar lighting device sufficiently in advance.

Etiquette When Passing Through Residential Areas
Parts of this race’s course pass through residential areas and villages. Please fully understand that this event is held with the understanding and cooperation of local residents, and act with consideration for the community.

In particular, when passing through residential areas at night or in the early morning, please refrain from loud conversations or unnecessary shouting, and run quietly. Additionally, please help reduce noise by muting or removing your bear bells before entering residential areas.

Behaviors that cause inconvenience to local residents or other users—such as littering, trespassing on private property, or violating traffic rules—are strictly prohibited.

Failure to follow the instructions of event staff or engaging in behavior that causes significant inconvenience to local residents may result in penalties or disqualification.

To ensure the continued success of the Hiroshima Ultra-Trail by UTMB®, we ask that each participant act responsibly, demonstrating respect and gratitude toward the local community.

If you are unable to participate in the event, you may receive a refund of the entry fee only in accordance with the “Athlete Withdrawal Deadlines” outlined below.

If the specified deadline has passed, no refunds will be issued for athlete withdrawals.

Refund requests must be submitted in writing to the organizer via email at HiroshimaUltraTrail@service.byutmb.world

Refunds for Eligible Withdrawals:

If you are eligible for a refund, the refund process may take up to 30 business days. Refunds will be automatically issued to the credit card originally used to pay the registration fee. If that card has since been canceled or has expired, it is the participant’s responsibility to notify our customer service team of this fact when requesting a refund.

• For cancellations submitted by 11:59 p.m. on October 9, 2026 (GMT+9), 40% of the entry fee will be refunded.
• For cancellations submitted by 11:59 p.m. on January 9, 2027 (GMT+9), 20% of the entry fee will be refunded.
• No refunds will be issued under any circumstances after 11:59 PM on January 9, 2027 (GMT+9).

Any add-ons paid for at the time of entry (if applicable) that have already been paid to third parties by the event organizer are non-refundable.

If you decide to withdraw from the event after picking up your race kit at check-in, please notify the Information Counter at the event venue.

If you need to withdraw on race day, you are obligated to report to the “Withdrawal Officer” at the Information Counter.

For races with elite runners (as recognized by UTMB), invitational runners and top local runners will be assigned to the Elite Runners Pen, that will be standing in front under the starting arch.

They will start before other pens.

1. Other Pen assignment will be based on UTMB index (deadline 6 weeks from event date) sorted by the highest UTMB index to the lowest.
2. Runners in Lower Start Pen may not move to Upper Start Pen unless an application is made to the race organizer with certified proof of previous race credentials and results (example: best marathon time). The decision of the race organizer is final.
3. Cut off time to apply for upgrade to Upper Start Pen is at 6:00pm (GMT+9) on Friday 9 April 2027. No extension will be entertained.

Athletes can request to transfer their entry to a lesser or greater race distance up until such time as that race distance is sold out, subject to the following terms: 

• The deadline to  request a transfer from one race distance to another is 11.59pm (GMT+9) 31 Jan 2027.
• Transferring to a greater distance: Where  an athlete requests to transfer to a greater distance and space is available, the athlete is required to pay the difference in entry fees between the two  distances.
• Transferring to a shorter distance: Where  an athlete requests to transfer to a shorter distance and space is available, the difference in entry fees will not be refunded.
• Transfers are only available if the new distance is not sold out.

Athletes can transfer their race entry to someone else in accordance with the below-stated Person-to-Person Transfer date. 

• Athlete to athlete for the same distance until 11.59pm (GMT+9) January 31 2027. A transfer fee of JPY5000 including all fees and taxes will be charged to the withdrawing athlete. The original registration fees will not be refunded.
• No person-to-person transfers accepted after 11.59pm (GMT+9) January 31 2027.
• Additional purchases paid for at the time of entry (if any) which are paid by the Event Operator to a third-party are not refundable and will not be transferred with your entry.
• It is not possible to transfer your entry to someone else who wants to do a different-distance event (e.g., HIROSHIMA 100K to HIROSHIMA 50K).
•  To transfer an entry to someone else, the initial registrant must write in to request a transfer as well as to include the details of the person who will be taking up the race slot (First Name, Last Name, email address, and gender)
• The receiving athlete will be sent a link to complete the registration and will need to pay for the entry (at the current entry price) in order for the transfer to process; then the original athlete will be refunded their entry fee less the relevant transfer fee as outlined above, including all fees and taxes.
• As stated in the Event Waiver, under no circumstance are you permitted to give your bib to another person. The safety of our athletes is paramount; therefore, we need to ensure we have correct details of all our athletes on course. 
• Any questions on transfers can be in writing via email at HiroshimaUltraTrail@service.byutmb.world

UTMB have released the UTMB World Series Pregnancy Policy, which applies to this event.
The full UTMB World Series Path To Parenthood Policy is available.

UTMB World Series Paths to Parenthood Policy

The safety of all athletes on course is our priority. Our event team considers each race/event individually to determine the entry requirements. Due to course conditions, Hiroshima Ultra-Trail by UTMB® is not suitable to be completed using wheelchairs or with prams across all distances. While this race is not suitable, our goal is to make everyone's racing dreams a reality so if you would like information on other events where the course is able to accommodate wheelchair participation or any other course accessibility needs, please email us at
HiroshimaUltraTrail@service.byutmb.world.