Surely they'll post the new riding width on the the website when everything is set in stone. I've never been to any of the trails riding so I'm don't know where the trails are located. I hope they have clear info and mapping.
@Bighat thanks for the link on the future plans.
The National Forrest has a lot of rules they have to navigate.
The whole 50" thing is from them.
There are some circumstances where they can follow the local state rules but it's just easyer for them to default to the NF rules.