You can get trail maps at most of the motels in revy, I picked up one at peaks motel last week. Not sure how up to date they are with the logging going on at frisby ect.
You can get a really good map of Boulder Mountain at the court house somewhere in Revelstoke, they are a picture of the mountain like the one where you sign in at the cabin. A fellow from Revy told me about them.
Who really needs a map just call mark shade, hire him as your guide for the day,He will show you around and make sure that search and rescue has a really nice holiday
Revelstoke riding areas maps are available at the trailheads. The Snowmobile Revelstoke Society office is on the 1st floor of the Revelstoke Courthouse, I think that is what Hughman was referring to.