BackYard SwimRun Amsterdam

Discover the new format in breathtaking waterland landscape 

Amsterdam, Netherland 

20th June 2026

Het Twiske Amsterdam: Paradise for Adventure Athletes

Just outside Amsterdam lies a hidden gem ‘Het Twiske’, a breathtaking Natura 2000 reserve where nature and endurance meet. It’s not just a place to run, swim, and push your limits - it’s a playground for adventurers.

The Setting
Set in the heart of the Waterland landscape, Het Twiske offers open grassland polders, glistening peat streams, and untouched beauty. While running or swimming, you might spot Highland cattle grazing in the fields or waterfowl gliding across the lakes - a truly unique backdrop for your next challenge.

The Challenge: Backyard Ultra Amsterdam
This swimrun concept is beautifully simple - and brutally fun. Every hour, you start a 5 km swimrun loop.
You continue until you can’t finish a lap within the hour… or until you become a Backyard Ultra Swimrun Hero by conquering all 10 laps.

Choose Your Adventure
Whether you’re an experienced swimrunner chasing endurance glory or an adventurer who just wants to experience nature in motion, the Backyard Ultra Amsterdam welcomes you. Do one lap, do ten - it’s your race, your rhythm, your adventure.

Join us in Het Twiske, and experience what happens when nature meets endurance.

Are you ready to find your limits — and go beyond?

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