A brook is a small, fast-flowing stream, while a run is also a term for a small stream, often used regionally. Both are generally smaller than creeks and rivers, but the specific definitions can vary by location.
Historical mapping indicates that Roland Run and Thornton Road Tributary follow similar flow paths from Lutherville to Lake Roland. However, most of the channel was likely altered in the 1950s to accommodate development, including housing, infrastructure, utilities, and a ballfield.
Bamboo is an invasive plant that is taking over part of the banks of the Roland Run. Several years ago, the Baltimore County Department of Environment and Sustainability cut down the same bamboo forest. The forest has grown and displacing the natural plants and trees. This is the area the Friends of Roland Run cut down.
