November 2020

The 6th edition of the OMM Japan will be held in the Nagano Prefecture where the 1998 winter Olympics was held. As with the UK event, competitors race between as series of checkpoints to an overnight camp in the mountains.

Carrying all equipment needed for 2 days, teams need to be self reliant and be able to make good decisions in a mountainous environment. The Japanese terrain is very steep and with a good chance of snow, the race will be a great challenge for all abilities.



When choosing a course you should bear in mind that the terrain & weather conditions will make the courses significantly harder. The distance vs ascent ratio quoted are the planning guidelines and will vary by location.

If this is your first OMM we would recommend the Medium Score Course as this will give you the best chance of finishing.


Time trial: The fastest team around a set number of checkpoints over the 2 days wins.
Distances & ascents below our examples based on previous years.


Day 1: 36km / 1650m. Example map
Day 2: 29km / 1350m. Example map


Day 1: 25km / 1400m. Example map
Day 2: 20km / 1000m. Example map


Day 1: 25km / 1100m. Example map
Day 2: 20km / 900m. Example map


Points based: The team that collects the most points across the 2 days wins.
Distances & ascents below are examples from previous years.


Day 1: 7 hours. Example map
Day 2: 6 hours. Example map


Day 1: 6 hours. Example map
Day 2: 5 hours. Example map

Full course descriptions below.


The Rules

In order to create a fair and equitable competition for each participant of the OMM and to guarantee the safety of the participants, these OMM rules have been created which regulate the behaviour of the participants as well as their clothing and equipment. Any participant who breaks these OMM rules can be excluded from the current competition and also from future competitions.


The Golden Rule: When a team has registered they must report back to the event centre by 17.00 on Sunday and return their SI card. If this does not happen, it is automatically assumed that this team is missing and a search is instigated. If the SI card is not returned before leaving the competition area and therefore a search is made, the resulting costs can be transferred to this team.


Minimum age for all participants is 15 years. For all children under the age of 18, a declaration of consent must be submitted by the parents.


Each participant must have a minimum of experience in the mountains and can safely navigate with a map and compass. Appropriate experience must be listed in the registration form.


The OMM is a competition for teams of 2 people. Team members must always remain within communicating distance throughout the period of the competition. Team members must visit all checkpoints together and have all the necessary equipment on them, e.g. both rucksacks must always be with the team and must not be deposited on the course. If a team member has to retire from the competition, the other team member must automatically retire from the competition. A team may only separate in an emergency if a participant can not move and the other participant needs to get help. In this case, the team must decide how best to proceed. If a participant in the competition area has to be left in such an emergency, it is the responsibility of the other team member that the injured person be left warm, dry and safe. On the competition map is the emergency telephone number, which must be used in this case. There is mobile coverage in almost all higher locations of the competition area.


Out of bounds areas and compulsory passages are clearly marked on the map and must be observed accordingly.


All equipment and clothing prescribed on the equipment list must be carried or worn during the entire competition. The equipment list is the absolute minimum required for a safe race. The equipment checklist must be signed by each participant and handed over at registration.


Each team must have a mobile phone with a SIM card that can be connected in the competition area. Telephones may only be used in the event of an emergency during the competition; it is also not allowed to use them at the overnight campsite.


GPS devices (also as part of a phone) may be carried, but not used during the competition, except in emergencies. GPS watches may be worn, but not used for navigation purposes. The use of a GPS device or a mobile phone (other than taking pictures) automatically leads to disqualification.


Participants who place themselves or others in danger, refuse to follow instructions from an official or are disrespectful to other competitors or officials may be disqualified from the current competition and excluded from future competitions. Interpretation of this rule is reserved to the discretion of the race management.


Participants must, on request, allow their equipment to be inspected at all times by officials, even after the finish line.


Teams must still have a minimum level of emergency food at the end of the competition.


Campfires are forbidden throughout the competition.


Night rest at the campsite is at 22.00, afterwards all noise is forbidden.


The start windows and the closing times of the race for both days are printed on the map and must be followed. Teams that do not comply with these times may be disqualified or may continue the race in an unofficial category with the permission of the race management.


Rubbish: There are rubbish containers at the competition centre and at the campsite. All rubbish must be carried during the race. Disregarding this will lead to disqualification.


Except in emergencies, participants are not allowed to take any help. This includes, for example, the purchase of food during the competition or help with navigation.


A race briefing is obligatory for all participants. Participants may not start without taking part in the briefing.


The organizer reserves the right to publicise the event by means of radio, television, print media and the Internet, as well as film and photo recordings of the events for its own press releases, PR and advertising purposes. The participant agrees to be filmed, photographed, interviewed and/or reproduced or presented in any other way during his/her participation in the event. In this respect, the participant grants the organizer free of charge the rights of use in the representation of his person and his voice exclusively, as well as in terms of space, time and content, without restriction for the above-mentioned purposes. In particular, the right to edit the film and photo recordings in any way, as well as the transfer of the rights of use to third parties, is also covered by the granting of rights.


Region: Nagano Prefecture Suwa – Chino
Event Centre: Kurumayama plateau SKYPARK SkiKurumayama plateau SKYPARK Ski
 391-0301 Nagano Prefecture Hadano City Kitayama 3413

Equipment list

Each participant and each team must carry adequate equipment and clothing in order to be able to move independently in the mountains for 2 days in September. The list of equipment is the absolute minimum that must be carried along. Participants should decide on the weather, their own experience and abilities themselves, which other equipment they also have to take with them.


The organizer reserves the right to disqualify participants who, in the opinion of the race management, do not have the necessary equipment to be properly equipped in an emergency situation. Cotton clothing, for example, is not appropriate for an OMM.


Each participant must always have the following equipment:

  • Waterproof jacket with hood and taped seams
  • Waterproof long trousers with taped seams
  • Running clothes for the mountains
  • Extra to the running clothes a long-sleeved thermal shirt and a long trousers (this may not be worn at the start)
  • Warm top, long sleeve
  • Warm hat, gloves and socks
  • Shoes suitable for mud, gravel and trail running
  • Headlamp with minimum 12h battery power
  • Signal whistle
  • Compass
  • Bear bell
  • Map (provided by the organiser)
  • Insulated sleeping system
  • Pen and paper, both must be water resistant
  • Bivouac sack / emergency bag – no blanket, it must be a closed sack
  • Backpack, no hip bag
  • Emergency rations
  • Water carrying capacity
  • Sleeping bag and spare warm kit must be waterproofed.


Each team must always have the following equipment:

  • First aid pack – contents at competitors discretion
  • Cooking equipment with stove and enough fuel for 2 days, with sufficient fuel left at the end of the race in case of emergencies.
  • Tent. Without a sewn in ground sheet is acceptable
  • Food for 2 people for 2 days


As is usual in this kind of competition, the exact course will not be announced until the start line of the event, where the maps are marked with checkpoints. OMM Japan has two different types of courses: Straight and Score.


STRAIGHT COURSE: The checkpoints must be visited in the correct order between start and finish. The checkpoints are connected on the map with a straight line, but the route is freely selectable, after the inclusion of restricted areas, etc. Winner is the team with the shortest time of the sum of both days, ie the fastest wins. Important is a good route selection and above all efficient and fast running.


ELITE COURSE: Goal time for the fastest teams is 11 hours (both days added). The course on both days together is about 50 km with 3000m altitude increase.


A COURSE: Goal time for the fastest teams is 9.5 hours (both days added) The course on both days together is about 40 km with a 2400m altitude increase.


B COURSE: Goal time for the fastest teams is 8 hours (both days added) The course on both days together is about 30 km with a 800m altitude increase.


SCORE COURSES: Each checkpoint has a score of 10 to 50 points. During a fixed time, you can run any number of items in any order. The team with the highest score (point sum of the two days) wins. If multiple teams have the same score, the team wins with the faster run time. If you exceed the maximum running time, points are deducted, 2 points per begun minute above the maximum time. Here are an efficient strategy and a good route selection are vital. A big advantage is that you can always shorten your course and still score. You do not have to take the maximum time, depending on how you feel. The items are set so that it is unlikely that teams will be able to collect all the checkpoints, so the course length will also challenge the fastest teams.


LONG SCORE: Allowed running time 7 hours on Saturday and 6 hours on Sunday.


SHORT SCORE: Allowed running time 6 hours on Saturday and 5 hours on Sunday.


Start time:

The start times on Saturday will be announced in the “Final Information Email” for each team before the race. Teams who miss their start time must report to the manager of the start zone and can get a new starting time. However, depending on availability, this may result in a longer waiting period. Start times for Sunday are also announced in the “Final Information Email”. However, these times may change depending on the results during the event. Participants must check independently on the bulletin board on Saturday evening, whether their starting times for Sunday have changed.


Campsite on Saturday:

The overnight stay during the Saturday night race is on a simple meadow. Water is provided, but this is not drinking water and must be treated accordingly. Toilets are available and rubbish can be disposed of in the containers provided. Only the provided toilets may be used. Teams may only stay in this area and leave the grounds only in case of an emergency after consultation with the race management. Only participants are allowed to enter the meadow, friends, relatives and supporters are not allowed to enter.



The competition map has been drawn specifically for the OMM Japan on the scale 1-25,000m~30,000m. Cartography symbols are slightly different than on standard topographical maps, so the legend should be read. On the map, race-specific details are marked: start, finish, campground, restricted areas, compulsory routes, etc. and checkpoints. Item descriptions are printed on the map. If a SI station does not work, it can be punched on the card with punching tongs.

Maps are only issued at the respective start, one per participant. There are different maps for Saturday and Sunday, so there are a total of 4 cards per team.



The whole time is taken with an electronic stamping system. Sportident SI Cards are used for the timing. Each team gets a SI Card which a participant must wear on the wrist for the entire race. Before the start, the “Clear” and then the “Check” box must be punched. At the start time the “start” box has to be punched. Teams who forget to punch the start will not place in the results. The time is stopped by punching the finish. Examples are shown during racing briefing.

All checkpoints have at least one control box, which must be punched. A sound can be heard while punching and a small lamp lights up. If the control box does not work, the map can be be stamped with a manual punch on the control. On some checkpoints there are several control boxes to avoid waiting times. Only one box needs to be punched.

The SI cards are fastened to the wrist with a band and can only be removed on the Sunday. If the SI Card is removed during the race, there is a risk of disqualification.


Day 2 Goal – end of the competition:

The finish is in the immediate vicinity of the event centre. The competition time ends when the SI Card is punched in the finish box. In the event centre, teams must then return their SI Card, receive their deposit and possibly deposited car keys and get a voucher for the free meal. Prize giving takes place as soon as the results are fixed.


Safety / Emergency:

The mountain rescue is available with vehicles on site. In case of an emergency, please call the race management.


Health insurance:

Each participant is responsible for full health and accident insurance.


Friday November 8:

12:oo Events Centre – Registration Open.
12:00-21:00 Event Centre – Friday Night (Pre-race) Festival (Shops, Food and Drink, Workshop etc).
22:00 – Registration Closed.
* Event details will be updated from time to time.


Saturday November 9:
05:00 – Event Centre: Registration Open.
08:00 – All Class Registration Closed.
08:00-10:30 – All Class Wave Start in Order.
20:00 – All Class Course Closed.


Sunday November 10.
06:00-08:30 –  Designated Campground / All Classes Sequential Wave Start.
14:00 – Awards Ceremony.
16:00 – All Class Course Closed, Event Closed.


Up to Sunday 3rd September 2018.  Changes to your team and to the course you have entered can be made by logging into your OMM account.  


After Sunday 3rd September 2018.  Amendments to teams can be made at registration or by emailing (up until Fri 8 Sep 17).  If making changes at registration the new member of the team must present himself/herself at registration in order to complete the necessary paperwork. It is up to the team to find replacement partners.  Course changes at this point will only be allowed if space is available.  



For any cancellations received up to 16th June 2018, a 90% refund is made.  After this date we cannot offer a refund as we have already paid for your attendance.  The event is run on a not for profit basis and one of the ways of keeping the costs as low as possible is to agree numbers as far in advance of the event as possible, hence why it becomes more expensive to enter as we get closer to the event.  For these reasons we are unable to defer entries to future events.


The organisation of the competition is conducted by a small army of unpaid volunteer helpers drawn from a wide variety of clubs and organisations, including the many faithful stalwarts who help out every year and without whose experience it would not be possible to conduct such an event.  These teams of volunteers allow us to keep the entry fees as low as possible to benefit you.


OMM Event Director – Stuart Hamilton

OMM Japan Event Director– Hideyuki Komine

Course Director – Dave Chapman

Course Planners – Koizumi-san

Competitor Communications – Jeff Jensen


If you would like to have a chat about logistics and travel arrangements please email our Japan team who will be happy to have a chat with you. Contact: