O-SEE Ultra Trail

Regulations and general information

These tenders contain all the information about

Categories / Age groups / Ratings
Distances
Entry fee
Time limit / Exit & Cut-off
Registration
Starting position change with O-SEE Flex / route change / starting position transfer
Distribution of starting documents / Late registration
Timekeeping / Evaluation
equipment
Start times // 17.10.2026
Race briefing in the start and finish area
Checkpoints Trail Runs
Trail markers
disqualification
Drop Bag
Catering
GPS tracking
Awards ceremony

Race Briefing

Time limit / Exit & Cut-off

Switch

Participants in the O-SEE 100k and O-SEE 75k races can switch to the next shorter distance during the competition. This switch is timed and scored but is not officially counted (no ranking or DUV ranking!). The race office must be informed of this switch by phone or, at the latest, by notifying the marshal at the switch point. O-SEE 100k participants who reach the cut-off point “K85 Brandsteinweg/Wiesenweg” after 8:45 p.m. must run directly towards the finish line (switch).

Switch Points:

O-SEA 100k ➘ 75k: Mařenice/Antonínovo údolí (50.807339 N, 14.666308 E) = K50
O-SEE 100k ➘ 75k: Brandsteinweg/Wiesenweg (50.831850 N, 14.741903 E) = K85 ... (Total distance 86 kilometers)
E-SEE 75k ➘ 50k: Hochwald/Pod Hvozdem (50.822337 N, 14.722908 E) = K45

Exit

In the event of a race cancellation at an aid station, the race number (and GPS tracker) must be handed in. In the case of a "wild" withdrawal from the race on the course, the race office must be informed immediately by telephone. A contact telephone number is printed on the race number. Failure to do so may result in the participant being billed for any search and rescue costs incurred.

In case of cancellation, there is no entitlement to return transport, even if every effort is made to ensure this.

In an acute health emergency, please call the emergency number 112 immediately.

equipment

For all trail run routes, the following equipment is recommended:

Mobile phone with the emergency number saved and the ability to send the location via WhatsApp, SMS or similar application
GPX-compatible phone or navigation watch with the saved route data for the respective route
Emergency equipment (tape bandage, elastic bandage, compress, plaster)
Closed trail running shoes with a profiled sole
Weatherproof clothing
Running backpack
whistle

The following equipment is mandatory:

100k/75k/50k/25k/16k: Drink containers for holding beverages at the refreshment stations
100k/75k/50k/25k: GPS tracker (distributed at check-in in the start and finish area)
100k/75k/50k: Water container with at least 1 liter of liquid
100k/75k/50k: Energy gels & bars
100k/75k/50k: Mobile phone (It must be ensured that the mobile phone can also make calls abroad)
100k/75k/50k: GPX-compatible phone or navigation watch with the saved route data for the respective route
100k/75k: Headlamp
100k/75k: ID card and health insurance card

GPS tracking

All participants in the O-SEE 100k, O-SEE 75k, XTERRA O-SEE 50k, and XTERRA O-SEE 25k will receive a GPS tracker with their race number. This tracker must be worn throughout the entire race and handed in after crossing the finish line. If a participant abandons the race, they must return the GPS tracker and their race number to the respective aid station. A fee of €100.00 will be charged to any GPS tracker not returned.

Awards ceremony

The award ceremonies will take place in the start and finish area.

Trail Runs

The top-placed male and female winners will be honored according to their ranking. The time will be announced on-site, likely starting at 6:00 PM.

Over the marathon (XTERRA O-SEE 50k SINGLE) and half marathon distances (XTERRA O-SEE 25k SINGLE), the top 3 male and female finishers in each distance will receive prize money in the following distribution:

XTERRA O-SEE 50k: €1,000 / €600 / €400
XTERRA O-SEE 25k: €300 / €200 / €100

When prize money is paid out to foreign participants, a withholding tax is deducted in accordance with income tax regulations.

Light and Kids Runs

The top-ranked male and female winners will be honored according to their ranking. The ceremony will take place on-site after the announcement, likely starting at 12:15 PM.

Starting position change with O-SEE Flex / route change / starting position transfer

Registration is binding. We ask for your understanding that, due to the significant logistical and organizational effort involved in this event, we are unable to refund any entry fees.

Starting position change for Trail Runs (O-SEE Flex)

Injury or wedding – with O-SEE Flex you're on the safe side: O-SEE Flex offers the option to postpone your starting place to the following year free of charge and without giving a reason, up until the official registration deadline. This option can only be booked with online registration. The fee is a flat rate of €20.00 per participant in addition to the entry fee.

The transfer of the starting place to the following year will be effected by issuing a voucher equal to the paid entry fee. A prerequisite for receiving the voucher code is successful cancellation via the link in the registration confirmation.

Without O-SEE Flex, changing the starting position is not possible!

Route change / Starting position transfer

Changing your registration to a different distance is possible until the official registration deadline. If you choose a longer distance, you will need to pay the difference in the current entry fee; if you choose a shorter distance, no refund will be given.

The transfer of the starting right (start number) to another person within the registered distance is also possible.

The change of route or participant must be communicated independently to Baer-Service GmbH, the service provider for the online registration:

Email: info@baer-service.de

Insurance (sports protection letter)

To protect against entry fees in case of illness or injury, Agater & Klisa GmbH offers a sports protection policy that includes cancellation and sports equipment insurance. This policy is administered through the "Annual Travel Insurance for Sporting Events" product of HanseMerkur Travel Insurance, German branch.

Please refer to the product information sheet for full insurance coverage details.

Get your sports protection policy now