The farm is located beside
NS4384 : School Road, which leads from the Horseshoe to the village of Gartocharn.
According to a lady whom I met on the day, the name of the farm was changed to avoid confusion with nearby
NS4384 : Caldarvan House. This is borne out by early OS maps: the first-edition map (surveyed c.1860) calls this farm West Caldarvan, and it is shown by that name until at least the 1950s (although it is possible that the name change took place earlier, and that the maps did not immediately reflect it). After that, the present-day name Ardgate is shown.
For another view of the farm, see
NS4384 : Ardgate.