I completed the Richmond half marathon. There were also options of a full marathon and 8k on the same day. All races started in different location in downtown Richmond so it was not overcrowded and corrals were not packed in.
Really well organized marathon, well they have had 40 years of experience. Bag check at UPS vans which drive to the finish for easy and fast bag pick up. Corrals well organized and not too crowded with plenty of portaloos.