When the riding was created, the bulk of its population was in the Cariboo goldfields district around Barkerville, although its boundaries extended to the Yukon boundaries - the original Cariboo riding at its creation included all of the former New Caledonia fur district, north of those parts of it now in the Lillooet Land District which formed the Lillooet riding.1 As mining exploration and other settlement spread northwards from the Cariboo mining areas, the Omineca, Fort George and Peace River (British Columbia electoral district)|ridings were split off by the end of the 19th Century, and the Cariboo riding was reduced to the Cariboo Plateau, south from Quesnel to just south of Williams Lake and 150 Mile House, and including the Barkerville, British Columbia region as well as the remote Chilcotin region, which had no voting (settler) population when the riding was formed other than isolated traders and trappers who may have had time or means to vote. Nearly all of the 785 voters in the first election were in the goldfield towns, Quesnel (then Quesnellemouthe), Williams Lake or towns and ranches south along the Cariboo Road and other routes of the era, and those along the West Fraser from the Chilcotin River, including the Gang Ranch south to just north of Big Bar, an isolated canyon ranching, river-crossing and wagon-trail town in the Fraser Canyon, which was in the Lillooet riding.