Totally agree. With the 508 being out of state this year (NV), might as well do Hoodoo 500 instead, it's quite a bit cheaper. If doing doubles gets too easy, you can try doing White Mountain Double Double (you can ride it twice on Saturday and Sunday) and look into brevets. You need to complete a 600 km brevet to qualify for the 508 anyway (there are other qualification options but they all seem to be harder and/or more expensive).