However, we were riding in the Columbia River. So literally a couple hundred yards north of where we were riding is WASHINGTON. There is actually a state line that is in the river (not necessarily the center of the river either).
The WA law says:
So I would say that since OR and WA laws conflict that I should get the benefit of the doubt when boating on a river that is on the state line...
Here is a map of where we ride at. The red circle is one of our spots (where we were last night), and the pink circle is another area we frequent. As you can see, those two areas are pretty obviously on the Oregon side of the state line. But a lot of areas would not be as clear cut...
https://lh6.googleusercontent.com/-M.../s1200/Map.jpg