Westercon

Westercon is selected like Worldcon with bidding, mail and at-con voting, and a 2-year lead time.

It is a Westercon tradition that GoHs are preferred from the region (west of the 92 W. longitude), having either been born or lived in the zone.

from Fancyclopedia 2 ca. 1959
An annual conclave for the Western half of the United States — West of the Rockies, that is — begun by the LASFS on Labor Day 1948. It has since become an institution for which other clubs bid also, like the Worldcon, and until the past year [i.e., 1958] was always some place in California.

See List of Westercons.