The Washington Laws on private property along water ways are pretty clear, to me at least. Average annual high water mark, that includes gravel bars, are state property. Gravel bars are considered stream bed in Washington state. No one actually owns the water. The stream bed under the water is the States.

I have been yelled at by tribal police for standing on the north side of the river, and have never been arrested or even ticketed.

The Purdy Cutoff is a state (maybe county) owned road. As a Washington state resident, I have the right to free passage and the means where permitted, parking along side the road. So my question here is, can they really do this? If the stream bed, gravel bars and the main road with parking access is owned by the state(not to mention the hatchery) why can the tribe shut down access?

It really feels cut and dry. Washington law is fairly clear on the matter.