Summer stock theaters are generally theaters that produce only in the summertime. The name "stock" comes from the tradition of putting on the same shows year to year and using and re-sing the same "stock" scenery and costumes. While some smaller theaters still continue this tradition, many summer stock theaters have become highly-egarded summer festivals producing new plays, musicals and operas and employing high-profile performers and large staffs. Some high quality summer theaters include: Utah Shakespeare Festival, Sante Fe Opera, Oregon Shakespeare, Williamstown Theater Festival and Glimmerglass Opera.