castellón died in 1971. a retrospective of his prints was held at the allied artists of america in 1978. in 1982, a retrospective exhibition of his work was held at anderson & anderson master prints (loveland, colorado). in 2004, his prints and paintings were exhibited at emil nelson gallery (denver, colorado). in early 2010, castellón's work was exhibited at the kalamazoo institute, along with the graphic work of francisco goya.