Create a realistic image of a young woman with an athletic build bathing in a clear, mountain stream. She is partially submerged in the cool, refreshing water, with droplets glistening on her skin. Her athletic wear is either fully or partially removed, revealing her toned physique. The stream flows gently over smooth rocks and small cascades, surrounded by lush green vegetation. The backdrop includes rugged mountain terrain and a clear blue sky. The natural light accentuates the woman's relaxed, serene expression as she enjoys the refreshing water and the peaceful mountain setting.