When I go for a run or hike, nothing bothers me more than my shorts riding up into my lady business. I'm constantly having to pull fabric out of places it shouldn't be in the first place, and it's more than annoying - it's quite uncomfortable too.
Check out the Sugar Mini Skirt from prAna. Could the name be any more perfect? I want to get one for all the Sugar gals.
It's got an elastic waistband and built in spandex shorts, so they'll stay put when you run. Plus, I know I don't feel comfortable running out in public in shorty shorts or tight spandex, so the skirt part will cover your booty, but will be short enough (they've got a 3 inch inseam) so you can run freely.
They are made out of New Viana® performance fabric like many of their other prAna products. This material is awesome because you can wash it over and over again, and it looks just like the day you bought it every time. So your black skirt will stay black, and it won't pill or change shape.
The Sugar Mini Skirt fits at the hips then flares out at the bottom. It's 12 1/2 inches long and comes in black, banana, and seafoam. If you want a running skirt in other colors, then check out the SkirtSport.
Fit's Tips: You can order one from prAna directly for $45, or you can check out the fitness and gear stores around you. Many of them carry prAna products.