We have just released a new feature we call MapShot (map snapshot). It shows races on a map of the continental United States. (Sorry Alaska and Hawaii.)
You can select common race types: Marathon, Half Marathon, Ultra, 5k, 10k etc. You can also select a month, specify a date range, or select Upcoming or Recent.
Cities with races are marked on a map. Color indicates the day of the week. Click a marker to see what races are in that city.
Here are examples of MapShots you can create:
There are also a few links to help you get started, on the top right of the home page.