What does the International Scale of River Difficulty range from?

Class I to Class VI.

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  1. Class 1 to Class 10
  2. Class I to Class VI ✔
  3. Class A to Class Z

Why: The scale classes whitewater in six categories, from Class I (easiest) to Class VI (most difficult).

Huh, didn't know that: The scale classes whitewater in six categories, from Class I (easiest) to Class VI (most difficult).

The dad joke
Class VI: no class clowning around.
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References

Answer: Class I to Class VI. The scale classes whitewater in six categories, from Class I (easiest) to Class VI (most difficult).

  1. Whitewater en.wikipedia.org/wiki/Whitewater
    classed in six categories from class I (the easiest and safest) to class VI (the most difficult and most dangerous)
    Checked 2026-11-07.

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