[3] Greenfield includes the geographically and culturally distinct sub-neighborhood of Four Mile Run, also known as Rusyn Valley.In 1768, a large tract of woodland was purchased for $10,000 under the Treaty of Fort Stanwix made with the Native Americans.By the late 1800s, many of Greenfield's residents were of Irish, Polish, Slovak, Italian, Hungarian, and Carpatho-Rusyn descent.A neighborhood with uneven and hilly topography, Greenfield has 26 distinct flights of city steps - many of which are open and in a safe condition.In Greenfield, the Steps of Pittsburgh quickly connect pedestrians to public transportation, business districts, and playgrounds and provide an easy way to travel through this hilly, densely populated area.