One of my dogs is constantly on a diet, so I feel your pain
Some dogs are more prone to keeping on weight than others. I would cut her food a bit, it sounds like she gets plenty of exercise. You also, if you have a yard, you could look into making a springpole, or flirtpole. They will give her an intense workout. Start off slow though, as she will be jumping a lot. You could also think about biking her, that will get her going a little faster than jogging. I also agree with looking at the fat content of her food, you may want to think about switching to a food with a lower fat content, or reducing her servings. Just some thoughts, she's a beautiful girl!