Young woman, light-skinned, mid-30s, sits in a shallow, fast-flowing river. Full-body shot, low-angle perspective. She is nude, hair dark brown, wet, and slightly tousled. Expression relaxed and carefree, with a subtle smile. Her body language is relaxed and comfortable, seated on a large, light gray rock. Her legs are outstretched, one foot touching the water. Hands are gently resting on her legs. Water is a cool, grayish-brown, flowing over rocks. Sunlight is bright and dappled, with highlights on the water and skin. The rocks and riverbed are light gray and brown, with some mossy green areas. Background includes more rocks and water, with natural vegetation visible near the far edge. Composition is casual and natural. Photography style is candid, capturing a moment in time by a rapid stream. Mood is serene, peaceful, and slightly playful, evoking the beauty of nature. Focus is sharp on the subject, with the background subtly blurred. Natural light, outdoor setting. Realistic portrayal of a young woman in a natural environment. Photographic realism style.