Microstegium vimineum (microstegium), also known as Japanese Stiltgrass, is an invasive grass that plagues Pennsylvania forests. Microstegium outcompetes native speacies to decrease species biodiversity and available foodstocks for wildlife. Previous studies in Pennsylvania have examined prevention and other studies in different parts of the U.S. have described factors affecting that area. None have discussed the specific factors leading to the population densities found in Rothrock State Forest. Data was obtained in association with the Deer Forest Project. Field measured values as well as GIS calculations were used. Results will be discussed further.