[chris (OP)]

William wrote to me to ask:

I was canoeing in northern Manitoba many years ago. My partner was an old trapper turned forest logging manager. Now we were going up river somewhere - the location escapes me, it's been at least thirty years. We got to the top end of this particular river and portaged to another river no more than fifty yards away. Now we had to climb up to this other river and began to paddle downriver. So he told me that there are only two places in the world (the other in Russia) that this phenomenon occurs.

My question is, does this actually occur where two rivers meet and are not connected and flow in the opposite directions? Where in Russia? Name of rivers? Location?

i apologize for so many words but this curiosity just popped into my brain all these years later! 

What does everyone think?

[mrsmith2211]

Well my thought is the most likely scenario is the rivers converge on a subcontinental divide. The water flows in, half goes one way and the other half the other way.

[chris (OP)]

Well my thought is the most likely scenario is the rivers converge on a subcontinental divide. The water flows in, half goes one way and the other half the other way.

Sounds plausible.

[mrsmith2211]

google is your friend, maybe
https://en.wikipedia.org/wiki/Isa_Lake
https://en.wikipedia.org/wiki/Two_Ocean_Pass
https://daisyfae.wordpress.com/2009/07/02/rafting-the-river/

[Bass]

how about one river splitting into 2 rivers- one which flows to the Pacific Ocean, the other to the Atlantic
Two Oceans Pass in Wyoming