Hardly Strictly Bluegrass (HSB), originally Strictly Bluegrass, is an annual free and non-commercial music festival held the first weekend of October in Golden Gate Park in San Francisco, California. Conceived and subsidized by San Francisco venture capitalist Warren Hellman, the festival has been held every year since the first event in 2001.

Golden Gate Park is an urban park between the Richmond and Sunset districts of San Francisco, United States. It is the largest park in the city, containing 1,017 acres (412 ha), and the third-most visited urban park in the United States, with an estimated 24 million visitors annually.