If you have multiple races to time on a single day, one choice is to create a group for each race, and then just
New watches for allat the bottom of the group when it's time for their race. Watches will offer to either add this group to the Current Race or create a new Race for this group.
Alternatively, you could create the actual watches, and then
use the ability to reload a race: While viewing the race in History, tap on the title of the race and then hit
Make Current Race. Note that you could even leave watches running on the existing
race without affecting their timing. Later just
Make Current Race again to
see the current times.