| American Leadership Academy Graduation | - |
| American Leadership Academy Graduation | - |
| American Leadership Academy Graduation | - |
| American Leadership Academy Graduation Ceremonies | - |
| Antique Engine & Tractor Show | - |
| Aquafina Pitch, Hit & Run | 04/19/2008 10:00 am - 12:00 pm |
| Aquafina Pitch, Hit & Run | 03/28/2009 10:00 am - 12:00 pm |
| Aquafina Pitch, Hit & Run | 03/20/2010 8:00 am - 10:00 am |
| Archaeology Mini Expo | 04/01/2023 10:00 am - 2:00 pm |
| Arcola Ranch Fresian Horse Show | 10/12/2023 8:00 am |
| Arizona Appaloosa Association (AAA) Fall Classic Horse Show | - |
| Arizona Appaloosa Association (AAA) Spring Classic | 04/18/2009 8:00 am - 5:00 pm |
| Arizona Appaloosa Association (AAA) Spring Classic Horse Show | 05/01/2011 8:00 am - 5:00 pm |
| Arizona Classic Team Roping | 09/25/2009 7:00 pm - 10:00 pm |
| Arizona Classic Team Roping | 10/31/2009 9:30 am - 12:00 am |
| Arizona Classic Team Roping | 05/15/2009 7:00 pm - 10:00 pm |
| Arizona Classic Team Roping | 11/07/2009 9:30 am - 12:00 am |
| Arizona Classic Team Roping | 05/22/2009 7:00 pm - 10:00 pm |
| Arizona Classic Team Roping | 10/10/2009 9:00 am - 12:00 am |
| Arizona Classic Team Roping | 05/29/2009 7:00 pm - 10:00 pm |