REGISTRATIONS MARATHON SONIAN FOREST
17 May 2026
* Registration fees do not include processing fee or contribution ANB, VAT is included, and member rates are based on an Ultra Trail membership.
Registration Form Marathon Sonian Forest
Distance*
Waiting List
Waiting List
Waiting List
This distance is unfortunately sold out. You can click the button below to put you on our waiting list. IF any tickets will come available in the near future, you will be the first to know. In the mean time feel free to register for any of our other distances. If any tickets for our sold out distance do come available again, you can very easily upgrade or downgrade your chosen distance.
Waiting List
This distance is unfortunately sold out. You can click the button below to put you on our waiting list. IF any tickets will come available in the near future, you will be the first to know. In the mean time feel free to register for any of our other distances. If any tickets for our sold out distance do come available again, you can very easily upgrade or downgrade your chosen distance.
Run series BXL pass*
The Series Pass gives you access to all 5 Run Series BXL events.It is valid for 2 years from your first participation.
The most cost-effective, easiest, and most reliable way to take part.
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Waiting List
Medal*
Recent research shows that, on average, 50% of participants value receiving a medal. To prevent a large number from being discarded unused, the medal is offered as an optional, paid choice. In this way, we reduce unnecessary waste and contribute to a more sustainable and socially responsible organization.
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Waiting List
Technical T-shirt *
Order now your Technical T-shirt for this event. Size unisex.
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Waiting List
Softflask - Foldable cup*
Because we respect the environment we do not provide disposable plastic cups. So you have to bring a drinking cup or bottle yourself
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Waiting List
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Access / contribution Nature area ANB*
Since 2025, forest rangers have been requesting a contribution per participant for access to and use of the natural area, payable to the Agency for Nature & Forests. This contribution is used for the maintenance of the natural areas where this event takes place. The full amount goes directly to ANB. Optionally, you can contribute a higher amount.
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Insurance for physical accidents*
By default you are NOT insured through the organization for physical injuries during the race.
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Waiting List
RunMotion Coach*
Try Premium for free! We are offering our participants two months of free access to the Premium version. RunMotion Coach is your personal training partner in your pocket. Developed by top coaches and sports experts with the help of artificial intelligence, RunMotion provides a personalised programme that allows you to tackle any challenge. This smart app creates a training schedule in just a few minutes that is fully adapted to your level, experience, ambitions and schedule.
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Waiting List
Etixx Endurance Pack*
Prepare optimally with Etixx Sports Nutrition! Buy your Etixx introductory package here at an exclusive 50% discount! In addition, your package will be delivered at home for FREE.
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Waiting List
How do you get to the event?*
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Waiting List
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Waiting List
PERSONALIZE YOUR OWN REFUND POLICY *
Set your refund conditions below in case you cannot appear at the start line of this event.
You will not be able to change your choice after registration.
Refunds will always be made in online credits/voucher or, for an additional fee, in cash to your account.
Read the ACTI+ policy here.here
You will not be able to change your choice after registration.
Refunds will always be made in online credits/voucher or, for an additional fee, in cash to your account.
Read the ACTI+ policy here.here
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