Queen's Highway
The Queen's Highway is a road leading from Kimbaloo into the Winkie Country.
First named in The Lost King of Oz, ch. 1
away down the Queen's Highway, that led through the wood
Where this is
placed In Oz worked out
read out of the chapters cited on this page, not stated in any one sentence of them
Leads out of Kimbaloo, which Lost King of Oz ch2 establishes as one of the many kingdoms of the Gillikin Country of Oz.
What the books say it is
region through the wood into the Winkie Country 1 chapter
Then away down the Queen's Highway, that led through the wood into the Winkie Country, they would hurry--and so charming and quaint were the Queen's little flower girls no one could help buying their posies.
The Lost King of Oz, ch. 1