Short. It's the only way to survive the Phoenix heat. I know it's time to get it cut when it sticks to my neck, and feels crunchy with dried salt at the end of a ride! I used to wear it long and in a pony tail when I ran half-marathons, but helmets require short hair. I found how great short hair is when I lost all mine to chemo, and thus got to wear it at various short lengths. When I found out I could get ready to go to work in half the time, not having to mess with the curling iron to look respectable, I never let it get very long at all. Gel, and blow dry with a curling brush. With helmet head, I can just use my fingers to rustle it up again and look halfway decent. Well, except in July, August, and September, when the head melts. Then, no one else looks good either! Who cares?