The end of an exciting season of historical programs at Colonial Pemaquid will be celebrated in a concert by Castlebay on Saturday, Aug. 30. In two outdoor performances at 1 and 3 p.m., the musical duo of Julia Lane and Fred Gosbee will share the music of Maine’s Celtic forebears in voice, harp, guitar, fiddle and woodwinds.

The musical traditions of the Scots-Irish colonists who settled prominently in the Maine Midcoast in the 18th century are the inspiration for much of the original and adapted music that Castlebay performs.

Since 1984, Castlebay has created a body of work reflecting Maine’s maritime heritage and environment, giving a new voice to an ancient tradition with their creative songwriting. Lane and Gosbee have written, recorded and produced three albums of completely original music — “Song of the Sea” and “The Ballad of Cappy John.” Newly released in June 2013 is “John Earthy’s Tavern,” which has 16 songs from Maine history, including the Popham Colony of 1607.

They perform frequently at festivals, museums and schools both at home and abroad, including the International Festival of the Sea (Bristol, England), the Edinburgh Folk Festival (Scotland), Mystic Seaport, Connecticut, and the Maine Lobster Festival. Castlebay’s music also has been used on Turner Broadcasting’s Portrait of America series.

For more on Castlebay, visit www.castlebay.net.

Admission to the concert is free, but the customary Maine park fees may apply. Donations are gratefully accepted.

Colonial Pemaquid State Historic Site includes on its grounds a reconstructed fort with permanent exhibit, archaeological ruins, a reconstructed 17th century thatched cottage, cemetery, artifact museum and gift shop. The site offers a glimpse of English frontier settlement life in the New World during the 17th and 18th centuries.

Colonial Pemaquid is open daily 9 a.m. to 5 p.m. Memorial Day through Labor Day. It is located off Route 130 at 2 Colonial Pemaquid Drive, approximately 12 miles south of Route 1 and three miles north of the Pemaquid Point Lighthouse. From Route 130 South, in New Harbor, turn right onto Huddle Road and follow signs to Colonial Pemaquid. From Route 32 South, turn left onto Route 130 and then immediately right onto Snowball Hill Road, following signs to Colonial Pemaquid.

For more information, visit www.friendsofcolonialpemaquid.org, or contact the park manager at 207-677-2423.