My fellow club member David became the first rider over 60 to finish the RAAM. He failed on his first attempt due to hyponatremia. He gained about 15 pounds of water weight and he's a little guy. He couldn't put his shoes on because his feet and legs were so swollen.
The next year he had figured out the nutrition and hydration and finished with some time to spare. The next time he did it he became the first rider over 65 to finish and he said it was relatively easy.