[Geysers] Old names

[Gordon Bower]

> The canyon between (about)   Mile Bridge and Madison Junction is  
> labeled as "Third Canyon." 
> I find no "Second Canyon" on the map...
 
The Yellowstone River canyons were named from the bottom up (Yankee Jim, Black, and Grand were 2nd 3rd and 4th, in that order.)
 
I would suggest that the west entrance road is the 3rd canyon of the Madison (Bear Trap and Hebgen Lake being the 1st and 2nd), while Gibbon Falls is the mouth of the 1st canyon of the Gibbon.
 
GRB