(MD) (Montgomery Parks) National Public Lands Day is a celebration of one of our most precious resources: our public parks and trails. Please join us a day early in celebrating Public Lands Day by helping to clean up Black Hill Regional Park for people and wildlife to enjoy. Parents must accompany children 13 and under. Interested groups should email Katie.Festa@Montgomeryparks.org. Registration is required. Please register at www.ParksVolunteers.org.