On: River Runner: drop a raindrop anywhere in the USA,...

[graderjs]

It's pretty nuts to me that a raindrop that falls in Crow Agency, Montana will drain into the Gulf of Mexico!!! :p :) xx

[Infernal → graderjs]

I wonder how long that journey takes? Assuming no evaporation of our sample drop.

[kempbellt → Infernal]

Napkin math.

Longest run I've seen (posted in another comment above) starting in NW Montana: https://river-runner.samlearner.com/?lng=-113.26136901231438...

5570 km (3461 miles)

Rivers fluctuate between 3 to 15 mph on average (quick Googling).

At an average of 3mph: ~48 days

15mph: ~9.6 days

7mph: ~20.6 days

I'm sure the time of year you decide to run the experiment would change the results pretty drastically.