I run in make-up. I know, I know.
Ideally you want to run without, especially if you have problem skin as pores can become clogged. Also, if you happen to sweat (rather than delicately perspire) youre bound to end up with a mascara moustache okay, that may be an exaggeration but you get the idea.
Hair should be off your face - again I flout the rules and run with flowing tresses. Sure, it sounds lovely but I tend to get caught up in my headphones and the ties on the neck of my top. I run with my hair down not for vanity sake but because hairbands just hate living with me and will escape from any bedside cabinet or shelf I place them upon (its all very The Borrowers).
Recently Ive been trying to follow these simple hair and beauty rules for running, mainly to avoid a choking hazard or from scaring small children with my cosmetic-less face