Sorry, I haven't posted on this earlier. The Topaz Lodge is in my Commissioner District. I Just double checked with the Lodge manager to confirm the short answer.The address for everyone around Topaz Lake is Gardnerville. Which covers an area all the way to Minden NV 22 miles north and part way down HWY 208 were it changes to Wellington. So there isn't any official Topaz address or city, it has just been used for convienience of locating the area. Locally we call it Topaz Lake(by the lake) and Topaz Ranch Estates (off of HWY 208). Hope that is clear as mud.....Doug