Hi there. I have not run it but, I had signed up and things came up and I can't do it.. But I would think there are not really any hills. We go to disneyland and around the area where you will be running i don't remember seeing anything to demanding maybe a brige over the freeway. I also know it should be pretty hot.. So really drink that water till your pee is clear the day before and BRING extra water with you.. that you run with. I have been to races where there is not enough water to go around. Thankfully, I always carry my water and sports drink. But I feel bad for the people that don't . And have a blast.. Your going to have so much fun..