CAMDEN — Camden Opera House’s free outdoor concert series, Camden Summer Sounds, concludes 4 p.m. Sunday, Aug. 28, at the Camden Snow Bowl, 20 Barnestown Road. Jud Caswell will open the show, followed by Camden’s own folk music legend Gordon Bok.

The much-honored Bok’s masterful playing, rich, sonorous voice and wellspring of tunes and songs both original and from around the world promise a Summer Sounds send-off like no other. A master of singing, multiple instruments, folklore and history, the Midcoast native also is an innovator of both musical forms (the cantefable fusion of song and storytelling) and instruments, including the multi-keyed Bok Whistle and the ‘cellamba.

Maine singer/songwriter and instrumentalist Jud Caswell won the legendary Kerrville New Folk competition in 2006. His songs have been taught at Berklee College of Music and recorded by Judy Collins (“The Weight of the World,” co-written with Amy Speace and Grammy winner Jon Vezner).

Camden Summer Sounds is sponsored by First National Bank and First National Wealth Management, the Town of Camden, and the opera house’s Community Arts Fund. No tickets are needed, just bring lawn seating and a picnic (water is sold on site). Rain location, if forecast warrants it, will be the downtown Camden Opera House; that decision will be made by 5 p.m. the day before and announced on social media and camdenoperahouse.com.

During Labor Day weekend’s Camden Windjammer Festival, the opera house presents Johnny A. … Just Me and My Guitars, a solo performance by the flatpicker extraordinaire, with special guest Caroline Cotter. Tickets for the Saturday night, Sept. 3, concert are on sale now at camdenoperahouse.com.

Jud Caswell Photo by Ed Caswell