Largest naturally frozen ice rink

According to Official Guinness Records,

The Rideau Canal Skateway in Ottawa, Ontario, Canada, is 7.8 km (4.8 miles) long and has a total maintained surface area of 165, 621 m² (1.782 million ft²), which is equivalent to 90 Olympic size skating rinks.
This is called an ice rink (as distinguished from any number of other frozen bodies of water) because its entire length received daily maintenance such as sweeping, ice thickness checks and there are toilet and recreational facilities along its entire length. We would like to put a claim on the longest (7.8km) and largest in square meters (165, 621 square meters) maintained ice surface on a natural body of water in the world.

For a complete list of Unknown date records, please visit Unknown date Guinness Records in Canada.

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