Loving all things Zwift! It’d be nice to show the distance (miles or km, based on user profile) in the initial route selection dropdown list that appears before riding.
When clicking the list to select a route, you’d then see the distance of each available routes. It could be something as simple as showing the distance to the right of the route name. Then it’d be easy for a rider to determine how many loops of a given route they need to try to achieve a certain distance goal.
For example on Watopia, the route list might show…
Figure 8 (22.3 miles)
Flat (5.3 miles)
Hilly (6.1 miles)
Mountain 8 (28.3 miles)