These use to be my favorite trails in the BH area for ATV use because they were truly 50 inch trails. This last trip was a bit disappointing because of all the trails that have been converted to 10 foot wide logging roads. Here are the 50 inch trails that are now logging roads either in whole or in part:
So basically just avoid everything around Blacktail TH.
If I had it to do over again, I would launch from Warren Peak and run 1042 both directions then 1044 and 1045. I would go over and hit 1201, 1202, 1203 and 1204. 1281, 1282 and 1283 are always nice. Still a full day of riding unless you just blast around full tilt.