Moorhouse also captured a significant variety of images on the development of the Oregon Territory. Six hundred views of ranch life, particularly wheat farming, document the ranchers, their homes, itinerant laborers, and their work in the fields. There are also thousands of images of small town and community life; businesses, schools, churches, and various forms of transportation, such as locomotives and automobiles. Social functions and entertainments appear in his photographs of circuses, parades, Wild West shows, and most notably the Pendleton Roundup in Pendleton, Oregon.