(VA) (Friends of Dyke Marsh) Enjoy Dyke Marsh’s fall colors on our walk  led by Margaret Chatham and Alan Ford. Fall’s colors are unpredictable, but we might see red sumac leaves and fruits, Virginia creeper vines in red and yellow hues and pokeweed’s purple berries and magenta stems. This walk is limited to 20 people so everyone can hear. Rain date:  October 24. Meet at the Haul Road Trail entrance.