OK, I’ll answer my own question here. Just to be clear I am not talking about routes and badges. I am talking about the Country Loop lap segment and the leaderboard which appears when you go through the red banner.
After a bit of Zwift stalking I figured out the following:
There are two Country Loop laps, one clockwise, one anti-clockwise. I have done the anti-clockwise one, I haven’t done the clockwise one yet but I assume it is the same course as anti-clockwise but in the opposite direction.
For anti-clockwise course select Flatland Loop as your route. You will spawn just south of the Red Banner. Ride forward a couple of hundred metres to go through the red banner then do a u-turn and ride through the red banner again to start the anti-clockwise lap. Zwift routed me on the course with no need to select any turns but if you are interested the directions are:
Turn right to go past the dragon claw to the Castle Outskirts.
Go straight to go through the sprint banner at the mountain village
Turn left to go to the fishing village
Continue straight to the Village Onsen
Continue straight to the Rice Paddies
Continue straight back to the red banner
Total lap distance is about 13km, maybe 12.9km. About 105m elevation.
This course is very similar (apart from the fact that this is the reverse direction) to the Flatland Loop but the Flatland loop goes through the marketplace street at the mountain village. The Country Loop lap goes through the sprint banner instead.
I presume that the clockwise lap is the same but in reverse. So if you want to do that lap you would select the Flatland Loop and ride straight through the red banner and continue on. When you get to the mountain village you will have manually change course to turn right to go through the sprint banner instead of continuing to the Marketplace Street.
This would explain why there are so few people on the leaderboard for this lap. If you did the Flatland Loop (which I guess most people are doing to get the badge) then you wouldn’t go through the sprint banner and thus you would go off course for the Country Loop lap.
Other points to note:
The lap timer disappears shortly after you leave the area of the red banner. Does it do that on other laps such as the Watopia Hilly lap? I can’t remember but seeing it disappear made me think I was off the course but that is not the case.
The lap timer returns about 2km from the end of the lap.
The course is completely on tarmac, no gravel shenanigans.
UPDATE: I can now confirm that the clockwise Country Loop lap is the same course as the anti-clockwise version. To ride the lap select the Flatland Loop as the route. You will spawn just south of the Red Banner. Shortly after passing through the Red Banner the lap timer will disappear off screen. Continue following the route through the Paddy Fields, Village Onsen, Fishing Village and back up to the mountain village and castle.
When you get to the mountain village go straight past the Castle Path turn-off but turn right at the Castle Outskirts road and go through the Village Sprint banner. The Flatlands Loop route takes you through the MarketPlace street but that would take you off the Country Loop lap so you need to manually turn right before the MarketPlace. The lap timer reappears when you make the right turn-off. Zwift should then route you to the finish at the Red Banner and it’s mostly downhill from the village.