In Great Falls of Snake River, Idaho Territory, Thomas Moran presents a breathtaking view of the falls. The painting is filled with vibrant greens and blues, depicting the lush surroundings and the rushing water. The sky is a mix of soft whites and blues, suggesting a clear day.

The composition draws the viewer's eye toward the powerful cascade of water, surrounded by rocky cliffs. Moran's technique showcases his ability to capture light and texture, making the water appear dynamic and alive. The brushwork is expressive, with thick strokes that create depth and movement. The painting measures approximately 76 x 127 cm, allowing for a grand portrayal of the landscape.

This size enhances the viewer's experience, immersing them in the natural beauty of the scene. Thomas Moran was a key figure in the American landscape painting movement, particularly known for his depictions of the West. This work was created during a time when the American public was becoming increasingly interested in the natural wonders of the West. An interesting fact about this painting is that it reflects Moran's role in promoting the establishment of national parks in the United States.

His artwork helped to raise awareness of the beauty of these landscapes and the need for their preservation.