In a perhaps hopeless effort to keep from exploding as I eat & drink my way through Madrid next week, I'm planning to go jogging (er...footing) in Retiro Park. I'm assuming this is safe for women alone in the evenings? Does anyone know if the park has opening/closing hours? Can anyone recommend their favorite trails? The park is huge, which side is best for entering for the jogging path? I don't want to end up lost overnight!