Drinking a cup of coffee before a race brings a benefit for runners. According to one study, pre-run caffeine has been shown to enhance performance and endurance. Another research shows that caffeine boosts your mental alertness, improves your mood, and boosts your desire to run hard.
When is the best time to take caffeine during a race? It's absorbed into the body very quickly, so you can drink a cup of coffee just before a race without worrying about having to wait very long for its effects.
On the other hand, it's also important to keep in mind that coffee makes you have to urinate, so If you want a pre-run cup of coffee, drink it early enough that you'll have time to use the bathroom.
Anyway, coffee is always a good friend of runners.