1921 N Bicentennial Blvd, McAllen. (956) 681-4562. The Great American Cleanup (GAC) is the biggest cleanup event Keep McAllen Beautiful hosts in the City of McAllen. Every year LOTS of volunteers gather to help cleanup McAllen streets, Hike & Bike trails, railroad tracks, parks, and schools. The Great American Cleanup will take place Saturday, April 15, 2023. Everyone is treated to a free t-shirt, food and fun. Look forward to seeing you there!