This is what we found on Wikipedia regarding the Maverick Festival:

Maverick Concert Hall was built in 1916 and was part of the Maverick Artist Colony in Hurley, New York.

The concert hall hosts the Maverick Concerts, a summer chamber music festival. Alexander Platt is the current music director. The mainstay of the series, which runs from the end of June through early September, is to be found in the chamber music concerts performed by distinguished soloists and ensembles on Saturday evenings and Sunday afternoons.

The Maverick Festival, a precursor to the Maverick Concerts, was founded in 1915 by Hervey White, and by 1931 the festival suspended.