This project is being led by the Friends of Hidden Oaks Nature Center, a non-profit group associated with a county nature center. The Mason District is one of several districts within Fairfax County, Virginia. It is a relatively urban community, with an ethnically diverse population. A recent trend has been for small single-family homes to be replaced with mini-mansions, reducing backyards and mature trees. Green space in the district has declined significantly in the last 20 years, while there has been a dramatic increase in impervious surfaces.