Earlier quoted context omitted.
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/201... https://worldbuilding.stackexchange.com/questions/34400/how-... -- Potentially 60 miles, if you consider The Florida Everglades to be a slow moving river. https://www.researchgate.net/figure/Average-water-depth-m-an... This site lists 30m as "average" for river width. No clue what rivers they were measuring. https://opb.pbslearningmedia.org/resource/buac…
Illegitimi non carborundum , Doreen.
I just tuckered out before getting to the part of trying to look up average river width for my home state of Georgia. I'm just tired today, as is often the case, or I would be all over that.
[1] Citation: https://news.ycombinator.com/item?id=19782650