It is also very gentle on the stomach; think of the BRAT (banana, rice, applesauce, toast) guideline for eating when you have an upset stomach. If you're worried about fiber before a race, stick with white rice. You can have rice for dinner or even breakfast before a race.
Low-GI foods provide a slow, steady supply of muscle fuel, making them a top choice for athletes. Consider adding these eats to your next pre-race meal plan.