In fact, as an appendix to what I just said, this is the problem the Waze engine has where with sufficiently low road types, it loses the ability to route as you approach a destination. In this case, Gerlach-Empire, NV to 'the segment where the gate to Burning Man on CR-34 is' fails, regardless of what the roads beyond that are typed. The routing engine is rejecting 'that length of primary street' as not reasonable to route on when it's the only thing between A and B. It's a known issue.
Retyping the road a distance on either side of BRC as minor highway should fix this on the next map update. I'll do this now.
AM in SW Shasta, NW Tehama, Central Trinity Counties, CA; Mt Rainier Nat'l Park, WA