I often want to know trail conditions, and a good way to check is to see if any of my friends have ridden since the last rain. However, I am not friends with everyone. It would be nice to be able to use custom dates in the heatmap. I would like to be able to enter the date of the last rain in the area, zoom in on the map, and see if it has been ridden since, and if so, how many times.
Obviously, just because someone HAS been there doesn't mean they should have, but this would provide some valuable information to determine if it's worth driving 15 miles to check out some singletrack, etc.