About Mattawoman Creek Art Center Mattawoman Creek Art Center (MCAC) is a 501(c)3 nonprofit organization founded in 1986 to encourage the practice and appreciation of the visual arts in the Southern Maryland community. Located in Smallwood State Park in Marbury, Maryland, the Art Center is open Fridays - Sundays from 11 a.m. - 4 p.m. for exhibit visitors. It is also open whenever workshops or special events are taking place and by special arrangement. MCAC receives support from Charles County Commissioners, Charles County Art Alliance, Maryland State Arts Council, Benefactors, and MCAC's membership fees. Donations are gratefully accepted. Follow us on Facebook!