106 km, about 95 on dirt. I mean dirt: These are not even secondary roads; I am planning this so late partly to make sure the roads are graded and nice and dry.
Over 2000m of climbing
No gas stations, no stores along the route. However, there are 4 swimming spots along the course, and there is a family cottage that will be used as a sag stop around the 75km point.
You can find the preliminary course here: