The topography of the watershed of Bowman Creek is described as "rough and hilly" in a 1921 book. There are steep hills in the upper reaches of the watershed, but gentle slopes on the valley floor. There are some small lakes such as Rymans Pond, which has a surface area of . A number of swamps are also present in the watershed. The area contains a narrow valley surrounded by hills that are between and in height. Glaciation has affected the watershed in the past.