This could/could not be canon. The X-Men trace a new mutant to Texas, where they promote various events at the State Fair.
Ultimately, they find the mutant, who is a centaur. The mutant never appears again after declining invitations to join up with both Professor X and Magneto.
The issue was given away in a Dallas newspaper, and concluded with a bunch of games (word finds, scrambles, etc,), as well as a special Bullpen Bulletin talking about how they distributed the issue.
I note that this may have been Jim Salicrup’s first published work for Marvel.