It would be nice to be able to see a graph with how your number of completed streets evolves over time: are you progressing linearly, are you slowing down?
Even better would be to get a graph per city in which the striders are compared to each other. This can encourage some competition as it will be much clearer if another strider is progressing much more quickly, or it can give some insight in at which street count other striders are leveling of in the city.
I maintain something like this for myself because I wanted to see a visualisation of how I was catching up to the leader in my city. Since the race can take months or even years in bigger cities it would definitely be cool to have the historical evolution. Once the city has been completed the graphs could be normalised as ādays from first runā (or signup date to CS, whichever is later) so that there is still a useful comparison to make.
I started doing this too, and then I realised that nobody else seemed to be targeting my city, so I a had a free run at it! 
Definitely keen to see graphs of progress for each city (e.g. alongside the existing leaderboard, to give a bit of context).
The popularity of CityStrides seems to have really picked up lately! There are lots of people in London now, seemingly active.
Itād be good to look at graphs for the ānested citiesā (i.e. individual Boroughs), as well as for Greater London itself. 
Interesting idea.
Would be cool to see an example.
Iām not very competitive when it comes to CS. Iām usually just doing a run, walk, or easy walk with my wife. But I do like seeing my percentage go up in the few cities I stride in regularly.