 The East Branch Trout Creek starts just east of the village and flows west to join the South Branch in Allentown to become the Trout Creek, a tributary of the Lehigh River.Gauff Hill is located at the junction of the two roads connecting the south sides of Allentown and Bethlehem, Emmaus Avenue and Susquehanna Street.These two roads form a triangle intersection with Seidersville Road and join to become Broadway, which continues via Fountain Hill to Bethlehem.