This is a Lakota woman and her travois dog.
This photo was taken on the Rosebud Indian Reservation in South Dakota.
I don’t know the date on which this was taken, but her dog is not a traditional travois dog.
It appears to be heavily derived from the Newfoundland/St. John’s water dog type.
These dogs were brought into the interior of North America by fur traders, and the Native Americans adopted them as working animals.
They bred with the indigenous dog, and because they were more resistant to disease and were not shot because settlers mistook them wolves or coyotes, they largely replaced the travois dog type.
This dog looks almost like a golden retriever that has been hooked up to a travois.