01. Okertalsperren Ultra-Marathon

The 01 Okertalsperren Ultra Marathon will take place on July 4, 2026, in Altenau in the Harz. The course covers 47.4 km and consists of three laps of a 15.8 km mostly flat route around the main arm of the Okertalsperre. The route runs along the forebay, over the dam and the main dam wall, offering a scenic running course with slight inclines. The event is suitable for experienced runners, self-supply is recommended, and timing is done independently. After the race, participants receive certificates via email, and the results are published on the website.

Self-supply is recommended, e.g., from the trunk of your own car. Timing is done independently with a running watch or mobile phone, proof via photo or screenshot sent by email to the organizer. Certificates are sent as PDFs via email. Result lists are published on the website. The race takes place on July 4, 2026. It is a self-supported event without an explicit registration fee, where participants must verify their results. The course consists of three laps of 15.8 km around the reservoir.