What if I don’t earn all 3 Stars for a particular race?

https://support.nascarheat.com/customer/portal/articles/2738404-what-if-i-don%E2%80%99t-earn-all-3-stars-for-a-particular-race-?b_id=15730

You can click on the location marker on the map and run the race again in order to complete all of the Challenges to earn all 3 Stars.