Currently an activity is shown as a uniform orange line on a map. I think it could be cool/useful to color this line on the map with a color that encodes the pace at which someone moved at each point of the activity. Eg blue = slower, orange = faster

this would basically integrate the “pace analysis” of an activity into the map plot, and could also show some interesting correlations, like whether or not any faster/slower splits might be due to certain types of terrain.

This idea could be extended into the global heat map, besides popularity it might be interesting to show relative pace differences of activities over all segments. This could be a good indicator of wether or not it’s a good place to run when building a route. If most people slows down over a certain stretch of road, odds are the terrain isn’t great there.