PickYourOwn.org strives to keep and up-to-date list of U-pick farms throughout the United States and the world, including pumpkin patches and corn mazes. The site lists U.S. farms by state and provides contact information as well as seasonal hours and available activities.
The Maize is an association of corn maze owners. Its website lists all of its member corn mazes by area and also provides information about their creation and upkeep. The site also has a helpful resource for school officials planning field trips to member farms.
PumpkinPatchesAndMore.org is another website dedicated to helping users find nearby pumpkin patches and corn mazes. It lists activities in all 50 states and some foreign countries.