From pages 8, 10, and 12 of the Race Handbook:

Awards will not be mailed. To be eligible for an award you have to run the race, and finish the race. After you finish the race you have to exit the finish line thru the finish chute, and you can’t leave the finish chute without passing by the Results & Awards tent, where ARE Event Productions staff can immediately print your results and tell you if you won an awards, which can also be picked-up immediately. (Every year several finishers place in their age groups, but walk right by the Results & Awards tent without checking.)