Create a realistic image of a young woman with an athletic build running through a mountainous terrain. She is wearing high-performance athletic wear suitable for trail running, including moisture-wicking leggings and a breathable top. The scene captures her in mid-stride, with a look of focused determination on her face. The rugged mountain landscape includes rocky paths, lush green vegetation, and distant peaks under a clear blue sky. The natural light highlights her toned physique and the dynamic movement of her run, emphasizing the beauty and challenge of the mountainous environment.