Would you be stopping for lunch or sight seeing?
If you push the rubber straight through, on pace with the commercials, it should take you about 2-3 hours to float from Ruby to Hecla. Probably another hour or possibly up to 2 to get from Hecla to Stone Bridge. Should be able to do the whole thing in around 4 hours....could probably get through even quicker if you paddle your ass off the whole time...
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