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The Iron Lake Challenge Brandenburg is the perfect combination of a sporting challenge and enjoying nature. As you loop around Brandenburg’s ten largest lakes, you’ll discover spectacular shorelines, collect unforgettable moments of happiness, and do good at the same time: trees are planted for your participation, including right here in Brandenburg.

Registration an Scope of Services
Registration for the Iron Lake Challenge Brandenburg costs 24 EUR.
This entry fee includes our Iron Lake Challenge ‘Brandenburg’ Edition collector’s medal as well as the green marble of the Timeless Challenge

However, you’ll first have to walk around the ten largest lakes in Brandenburg! Only then will we send you your well-deserved medal and marble! After all, you want to earn them rather than just be given them.
With your registration fee, you support my passion project to plant one million trees.
How to register
- Bitte klicken Sie auf das Bild, um zur Registrierungsseite unseres Partners Digistore24 weitergeleitet zu werden.
- You will receive a registration confirmation with all the important information.
- Now you have to walk around the ten largest lakes in Brandenburg. You can take as much time as you need for these ten lakes. As proof, you can upload a copy/screenshot of your tracking into 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
If you have walked around the ten largest lakes in Brandenburg, we will send you the beautiful Iron Lake Challenge “Brandenburg” Edition collector’s medal and the green marble by post. This can be the first one in your upcoming collection from the Iron Lake Challenge.
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The ten largest lakes in Brandenburg
Here are the ten largest lakes in Brandenburg. Enjoy every minute on the shores of these aquatic jewels!
| See | Approximate length in kilometers |
| Cottbuser Ostsee | 24 |
| Schwielochsee | 35 |
| Sedlitzer See | 22 |
| Senftenberger See | 15 |
| Scharmützelsee | 28 |
| Parsteiner See | 30 |
| Unteruckersee | 28 |
| Beetzsee | 40 |
| Talsperre Spremberg | 20 |
| Bergheider See | 11 |
Important Links
- Challenge Tool Brandenburg to log your circumgrid tours
- Honor Board Iron Lake Challenge Brandenburg
- Life Lake Museum Overall ranking of the challenge
- Life Museum (Overall Ranking – Timeless Challenge)
- Trees4Breeze – Reforestation and Forest Conservation, Funded by the Timeless Challenge
More Challenge Recommendations
![]() Enjoy more than a hundred amazing challenge ideas with the Timeless Challenge. | ![]() Enable a tree to grow old in peace with our Trees4Breeze tree sponsorship. | ![]() Iron Lake WORLD Challenge! Here, all lakes worldwide are counted as long as the shoreline length is greater than 2 kilometers. |




