Rock and pebble beaches sideshore launch from all directions. From the launch it is about a half mile downwinder. Wide open areas. Launch from anywhere around the lake. Best is the southeast tip and northeast bay, depending on winds.
This is a consistent west thermal wind, generally if it is a hot sunny day and there is snow on the snowy range then there is wind. 10-40kts are possible, this is not a beginner area. Light to big wind sailing, normally westerly winds, sometime shifting north or south if a squall is passing through.
From Laramie 15 miles southwest: take Wyoming Road 230 towards Woods Landing, after about 10 miles turn right - follow the signs `Laramie Prairie Lakes` and then exit to `Lake Hattie` at the end of the bend. Follow that road past the sharp right. When it starts turning again, that's Hattie. You can take the first entry or follow the road around for a bit farther to the second entry.