Which preposition to use with leadville

as Occurrences 1%

Aunt Martha said I would be just as well off in Denver or Leadville as in Chicago, and made me promise, if the worst came, not to let any charitable organization send me back to her.

from Occurrences 1%

Almost looked to Thorn as if he might have to go to work for a living, but he was a tenacious cuss, and stuck it out till one day when Jim came back to Leadville from a near-by camp, where he'd been looking at some played-out claims.

on Occurrences 1%

" "It would be absurd for the child to go to Leadville on that account.

Which preposition to use with  leadville