We've got a pretty great system here in Minnesota. We have a very extensive system of "easements". Easements are for angling access only and generally extend 66' either side of the center line of the stream. The easements are marked on publicly available set of maps and are also marked at access points (eg, road crossings). Generally, where there is an easement, you'll also find stiles for crossing fences. Easements are procured by our DNR with one time payment to the land owner and once purchased, the easements are perpetual.

In addition to easements, we've also got the "wet foot" / high water mark law. However, the streams around here are generally quite small, so most anglers that I know stay off streams unless they are eased or they have landowner permission.

Appreciate you bringing this up. Its an important topic both in terms of fishermen finding access and in terms of fishermen respecting landowners rights. Fishermen need to recognize that abusing access --eg trespassing, littering, disturbing livestock, damaging fences -- risk access rights for everyone.