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The Iron Lake Challenge Berlin combines athletic motivation with active recreation. As you circle Berlin’s ten largest lakes, you’ll discover the capital’s green side, build endurance, and enjoy valuable experiences in nature. Plus, you’ll reward yourself with a collector’s medal and support our sustainable reforestation project, Trees4Breeze.
Registration an Scope of Services
Registration for the Iron Lake Challenge Berlin costs 24 EUR.
This entry fee includes our Iron Lake Challenge “Berlin” Edition collector’s medal and the green marble from the Timeless Challenge.
However, to do that, you’ll first have to walk around Berlin’s ten largest lakes! Only then will we send you your well-deserved medal and marble! After all, you want to earn them, not receive them as a gift.
With your registration fee, you support my passion project to plant one million trees.
How to register
- Please click on the image and you will be redirected to the registration page of our partner Digistore24.
- You will receive a registration confirmation with all the important information.
- Now you have to walk around Berlin’s ten largest lakes. You can take as long as you need to complete the ten lakes. As proof, you can upload a screenshot of your tracking data to our challenge tool.
- Once we’ve checked your submission, you will get your well-deserved medal and marble. Simple as that, right?
Your medal and your marble
Once you’ve walked around Berlin’s ten largest lakes, we’ll mail you the beautiful Iron Lake Challenge “Berlin” Edition collector’s medal and the green marble. This can be the first item in your future Iron Lake Challenge collection.
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The Ten Largest Lakes in Berlin
These are the ten largest lakes in Berlin. Enjoy every minute on the shores of these aquatic gems!
| Lake | Length in kilometers (approx.) |
| Großer Müggelsee | 20 |
| Lake Tegel | 20 |
| Large Wannsee | 60 |
| Seddin Lake | 17 |
| Langer Lake | 17 |
| Krumme Lanke | 3 |
| Kaulsdorf Lakes | 6 |
| Heiligensee | 6 |
| Schlachtensee | 6 |
| Grunewald Lake | 3 |
Important Links
- Challenge Tool Berlin for Entering Your Laps
- Iron Lake Challenge Berlin Hall of Fame
- Life Lake Museum Overall ranking of the challenge
- Life Museum (Overall Ranking – Timeless Challenge)
- Trees4Breeze – Reforestation and Forest Conservation, Funded by the Timeless Challenge
