La Paz's post office was established January 17, 1865 and discontinued March 25, 1875. La Paz was already a ghost town in 1891 as the picture illustrates. Discovered by Pauline Weaver, the same man who discovered Weaver and Rich Hill, La Paz quickly grew into a big town of 1500 people. As the Colorado river changed course, the site was isolated as a steamboat stop and could not keep people around. By 1891 La Paz was a ghost town and a flood in 1910 wiped out what was left.

La Paz, Arizona: Considering how little there is left of La Paz, it seems a good idea to have as much history about the place as possible. Audrey Mac Hunter and the Big Man Himself, Randal Henderson, wrote an article for the DM September 1958 issue, Boom Days In Old La Paz