Marlboro Music
This storied chamber music festival and retreat in southern Vermont has a purist’s sensibility and a relaxed rustic vibe. The towering German avant-gardist Helmut Lachenmann is this summer’s composer-in-residence. Most programs are not announced in advance, but with Marlboro, it’s hard to go wrong. Through Aug. 13, Marlboro, Vt., 802-254-2394, www.marlboromusic.org
Tanglewood
More than half the season still remains at Tanglewood. Among the more tempting programs should be Handel’s “Acis and Galatea” with the Philharmonia Baroque under Richard Egarr (July 20); the Festival of Contemporary Music (July 27-31); cellist Alisa Weilerstein’s “Fragments 2″ program (Aug. 9); conductor Susanna Mälkki leading Bartok’s “Concerto for Orchestra” and Mozart’s Piano Concerto No. 9 with soloist Seong Jin Cho (Aug. 12); and Yo-Yo Ma joining Andris Nelsons and the BSO for Shostakovich’s Cello Concerto No. 1 (Aug. 13). 888-266-1200, www.tanglewood.org
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Bard SummerScape
This summer Bard offers a fully staged production of Saint-Saens’s rarely spotted opera “Henri VIII,” to be directed by Jean-Romain Vesperini and featuring Alfred Walker in the title role, with the American Symphony Orchestra under Leon Botstein’s baton (July 21-30). Then over two weekends in August, the festival will spotlight “Vaughan Williams and His World” with themed concerts, panel discussions, and all manner of ancillary events (Aug. 4-6, and 10-13). 845-758-7900, fishercenter.bard.edu

Aston Magna
The festive 50th-anniversary season of this venerable period-instrument festival culminates with a program of works by Bach, Purcell, and Villa Lobos. July 20 at Brandeis’s Slosberg Music Center; July 21 at Hudson Hall in Hudson, N.Y.; and July 22 at Saint James Place in Great Barrington. 413-528-3595, www.astonmagna.org
Boston Landmarks Orchestra
The ensemble’s much-loved series of free concerts at the Hatch Shell is back this month (read more from my colleague A.Z. Madonna). Happily, music director Christopher Wilkins has a gift for programming that is both innovative and welcoming to listeners from diverse communities across the city. First up will be the group’s annual “Green Concert” with music by Beethoven, Copland, Lili Boulanger, and Ethel Smyth as well as a new co-commissioned work by Brian Raphael Nabors. July 19, 7 p.m., 617-987-2000, landmarksorchestra.org
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Yellow Barn
To say the programming at this intimate Vermont festival rewards curious ears is an understatement. You won’t find chamber classics paired with a wider range of adventurous repertoire anywhere in New England. The London-based Mexican composer Hilda Paredes is in residence this summer, and on July 28, in one of many intriguing programs, her works will be paired with music by Gérard Pesson, Stephen Coxe, Hanns Eisler, and Ernst von Dohnanyi. Putney, Vt., 802-387-6637, www.yellowbarn.org
Newport Classical
The Knights, the dynamic New York-based chamber orchestra, offers an eclectic program including Colin Jacobsen’s “A Shadow Under Every Light” and Copland’s “Appalachian Spring.” July 23, 8 p.m., The Breakers, Newport, R.I., 401-846-1133, newportclassical.org
Cape Cod Chamber Music Festival
Among the highlights of this year’s festival, which takes place at multiple venues around Cape Cod, should be appearances by the Borromeo Quartet (Aug. 2 in Chatham), the Danish Quartet (Aug. 3 in Wellfleet), and the Emerson String Quartet in their Cape farewell (Aug. 18 in Wellfleet). 508-247-9400, www.capecodchambermusic.org

Rockport Chamber Music Festival
In a huge coup for Rockport, the festival will present the eminent Latvian violinist Gidon Kremer in a rare local recital, joined by pianist Yulianna Avdeeva and violinist Madara Pētersone. In addition to music of Brahms, Kremer will perform works by composers he has championed across his long career including Shostakovich, Schnittke, Silvestrov, Gubaidulina, and Weinberg. For serious fiddle fans, this is the unmissable event of the late-summer. Aug. 12, 7:30 p.m., Shalin Liu Performance Center, Rockport, 978-546-7391, rockportmusic.org
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Norfolk Chamber Music Festival
The veteran Miró Quartet offers a program of Mozart, Dvorak, and Caroline Shaw on July 21, and then returns July 29 with Mozart’s beloved Clarinet Quintet featuring guest artist David Shifrin, who will also play a selection of hits by Benny Goodman. Ellen Battell Stoeckel Estate, 20 Litchfield Road, Norfolk. 860-542-3000, www.norfolkmusic.org
Jeremy Eichler can be reached at jeremy.eichler@globe.com, or follow him @Jeremy_Eichler.