A number of streams flow through Shaw Nature Reserve. All are intermittent except Brush Creek, which flows from west to east in the northern half of Shaw Nature Reserve. These stream bottoms are a good place to study the exposed rock strata and the erosion and deposition of soil and rock. Species of plants requiring moist conditions or good drainage are found along the stream and stream bank. Brush Creek has a well-drained floodplain where walnut, paw-paw, and wild black cherry trees grow in addition to the bottomland species. Brush Creek travels eastward across Shaw Nature Reserve and is crossed by several roads and trails. The Brush Creek Trail crosses Brush Creek with an option of a large foot bridge or concrete cast stepping stones for a closer look.