Yes there are a few. See https://en.wikipedia.org/wiki/Bifurcation_%28river%29 and also Isa Lake - Wikipedia, the free encyclopedia. But note that in all of the cases they are on geologically unstable places. Specifically for the Teton Two Ocean Pass its on the North America Continental Divide and the Isa is at Yellowstone. These places will only exist temporarily and in a few hundred years or perhaps a little more but trifling geologically, one side will dominate the flow. There are more that normally only flow in one route but during floods will cause the flow to exceed the capacity of one side and will then have two paths to different places. It is a certainty that at the very edge of the catchment basin where it meets its neighboring catchment basin then a drop of water is critically unstable in its route to the sea. There would exist many places where the flow is a merest trickle and then bifurcates but the more considerable the flow of water the harder it would become to show the bifurcation. A larger flow would erode one side faster than a trickle over the flat ground on the edge of catchments.