Nirvana fans gather at the park on the anniversary of Cobain's death (April 5), and to a lesser extent on his birthday (February 20), to pay tribute to him.
The park's wooden benches, serving as the de facto memorial to Kurt Cobain in Seattle, are covered with graffiti messages to the rock icon.
Its first work party was scheduled to take place on Kurt Cobain's 44th birthday on February 20, 2011.
Since then Viretta Park Repair has been given the green light to hold additional work parties.
A second work party was held on June 4, 2011 where volunteers removed invasive holly and blackberry bushes, laid burlap and covered the area with bark mulch.