4. Inselmarathon - Einer der verrücktesten Marathons der Welt!

Are you ready for a marathon experience like no other?
Forget wide streets and open landscapes—at the Wilhelmstein Island Marathon on Steinhuder Meer, you’ll run in a very confined space, surrounded by thick fortress walls, old cannons, and the waters of Steinhuder Meer. It’s no wonder this event is considered one of the craziest marathons in the world! Take on the challenge and conquer the 18th-century island fortress at a running pace.

The races at a glance:

• Marathon (42.195 km)
• Half Marathon (21.1 km)
• Kids’ Races: Klabauter Run & Pirate Run

The Course: 120 laps to the finish line

The entire island is just 1.25 hectares in size. One lap measures exactly 351.9 meters—which means for the marathon distance: 120 laps around the fortress!
What sounds flat and leisurely is actually a real physical and mental challenge. Narrow paths—some only one meter wide—and many sharp turns around the four bastions demand full concentration. Overtaking takes practice! Those who master the mental challenge of the monotony will be carried along by a unique, historic setting and the support of the crowd.

The focus is on having fun

In this race, chasing personal bests takes a back seat. It’s all about the experience, endurance, and determination! The atmosphere is friendly and motivating. Tip: Creativity is definitely encouraged! Anyone who wants to is welcome to line up at the start in costume (e.g., as a knight, damsel, or pirate). The central refreshment tent will provide you with fresh energy and encouragement every lap.

Prizes you’ll only find here

You won’t find ordinary trophies at the Island Marathon. The fastest female and male runners will be awarded—as befits the occasion—a real cannonball! But here, everyone is a winner: All finishers will receive a well-deserved medal and a certificate at the finish line as a memento of this crazy adventure.

Important organizational information

• Travel & Logistics (Main Races): The experience begins even before the start! The entry fee for the marathon and half-marathon already includes the ferry ride from Steinhude to the island and back on the historic sailboats (“Auswanderer”) (travel time approx. 20 min.).
• Kids’ Races: For participants in the Klabauter and Pirate Races, refreshments and a certificate are included. Please note: Families must organize and pay for the ferry ride to the island themselves!
• Time limits: The marathon has a maximum time limit of 6 hours (cut-off for the half-marathon distance is 3 hours). The half-marathon has a time limit of 3 hours.
• Luggage & Spectators: Space is limited on the island. Please limit your luggage to the bare essentials (basic changing facilities are available). The island remains open to regular visitors, which creates a great, lively atmosphere. Spectators who wish to take the ferry must purchase their own ticket.
• Registration & Cancellation: Entry fees will be debited via direct debit starting February 1, 2027. No refunds will be issued after this date. However, you can transfer your entry to another person at no cost until April 17, 2027.

Come to the island and make running history. We look forward to seeing you at the Wilhelmstein Island Marathon!