In Ruiter op paard, Alfred Ost depicts a rider on horseback in a natural setting. The colors are rich and earthy, with deep browns and greens dominating the palette. The horse is portrayed in motion, suggesting a sense of vitality and energy.

The background features a blurred landscape, emphasizing the focus on the rider and their steed. The painting is executed in oil on canvas, showcasing Ost's skill in capturing realistic details. The brushwork is precise, allowing for a clear representation of the horse's musculature and the rider's attire. The composition is balanced, with the horse positioned slightly off-center to create a dynamic feel.

The dimensions are approximately 80 x 100 cm, making it a substantial work. Alfred Ost was a Belgian painter known for his depictions of horses and equestrian scenes. Ruiter op paard reflects his fascination with the movement and grace of these animals. An interesting fact about this work is that it was likely created during a time when equestrian culture was celebrated in Belgium, making it a significant representation of that era's artistic interests.