I guess the closest, as the cross flies, would be the eastern slopes of the Sierra Nevada Mountains or perhaps down by Tehachapi, or maybe the Fort Tejon area.
Big Horn's were nearly extinct here in Calif until somewhat recently.... still not abundant but doing ok.
As for my ranch... I don't think they were ever native to my ranch, not even in the old days. Elk disappeared for years but have been reintroduced and are making a comeback... none on my ranch yet, however, but a few just west of my ranch by about 10 miles. Some years ago we had 2 Elk settle in on my ranch but poachers killed them. Grizzlies were also native to my ranch historically but are long gone. Black Bears roam somewhat close... and it's possible we'll have some in the somewhat near future.
