The following lists of interstate competition events are approved for CIAC member high schools. If the event your school wants to participate in is not on this list the event has not been approved for participation for CIAC schools.
BORDERING STATE EVENTSNATIONAL EVENTS
| Date | Host | Sport | Event Title |
| 09/07/19 | MA | B&G CRoss Country | Vineyard Cross Country Invitational |
| 09/14/19 | MA | Cross Country | Ron Wayne Marathon Relay |
| 09/14/19 | CT | B&G Cross Country | Wilton Cross Country Invitational |
| 09/21/19 | NY | Girls Volleyball | 2019 NY-CT Invitational |
| 09/21/19 | MA | B&G Cross Country | Cross Country Invitational |
| 09/28/19 | MA | B&G Cross Country | Fronk Kelley XC Invite |
| 10/12/19 | CT | Girls Volleyball | CT Fall Brawl |
| 10/12/19 | MA | Cross Country | MSTA Baystate Invitational XC Meet |
| 10/18/19 | MA | Cross Country | Twi-Light Invitational |
| 12/21/19 | MA | Girls Basketball | MA/CT Basketball Challenge |
| 12/26/19 | NH | Boys Ice Hockey | Heuchling Swift Memorial Classic 12-26 to 12-29/ 2019 |
| 12/27/19 | MA | Boys &Girls Track and Field | Boston Holiday Challenge |
| 01/04/20 | MA | Wrestling | Falcon Duals |
| 01/25/20 | CT | Wrestling | 2020 Ridgefield Challenge |
Note: The NFHS often approves events which are not approved by CIAC so please go by the list of approved activities for CIAC member schools only.
| Date | Host | Sport | Event Title |
| 09/07/19 | PA | B&G Cross Country | 2019 PTXC-11 |
| 09/14/19 | PA | B&G Cross Country | Briarwood Invitational |
| 09/20/19 | CA | B&G Cross Country | 2019 Woodbridge Cross Country Classic |
| 09/21/19 | NH | Cross Country | 45th Manchester Invitational |
| 09/21/19 | CT | B&G Cross Country | 8th Winding Trails XC Invitational |
| 09/21/19 | NC | B&G Cross Country | Adidas Cross country Challenge |
| 09/28/19 | RI | B&G Cross Country | Ocean State Cross country Invitational |
| 09/28/19 | NY | B&G Cross Country | 2019 Bowdoin Park Cross Country Classic |
| 10/04/19 | NC | B&G Cross Country | Great American Cross Country Festival |
| 10/05/19 | VT | B&G Cross Country | Woods Trail |
| 10/11/19 | FL | B&G Cross Country | Disney Cross Country Classic |
| 10/12/19 | CT | B&G Cross Country | Wickham Invitation |
| 10/14/19 | CT | Girls Volleyball | International Volleyball Hall of Fame's VolleyHall Classic |
| 11/09/19 | CT | Boys Cross Country | New England Championship |
| 12/14/19 | NY | B&G Indoor Track&Field | Jm Mitchell Invitational |
| 12/20/19 | NY | B&G Indoor Track&Field | Coach Saint Invitational |
| 12/21/19 | DE | Wrestling | 2019 Beast of The East Wrestling |
| 12/21/19 | NY | B&G Indoor Track&Field | Energice Coaches Hall of Fame Invtational |
| 12/26/19 | NY | B&G Indoor Track&Field | North Shore High School Track and Field Invitational |
| 12/27/19 | FL | G&B Basketball | The Battle at the Villages Sunday participation is prohibited for CIAC Schools unless permission is granted by the CIAC |
| 12/27/19 | MA | Wrestling | George Bossi Lowell Holiday Tournament |
| 12/27/19 | RI | Boys Ice Hocey | MSC Holiday Face-Off |
| 12/27/19 | NY | B&G Indoor Track&Field | Marine Corps Holiday Classic |
| 01/02/20 | NY | Indoor Track&Field | Armory Hispanic Games |
| 01/08/20 | NY | B&G Indoor Track &Field | NYRR Millrose Trials |
| 01/10/20 | NY | Wrestling | Eastern States Classic |
| 01/16/20 | MA | G&B Basketball | Basketball Hall of Fame's Hoophall Classic Sunday participation is prohibited for CIAC Schools unless permission is granted by the CIAC |
| 01/17/20 | VA | B&G Indoor Track&Field | The VA Showcase |
| 01/17/20 | NY | B&G Indoor Track&Field | New Balance Games |
| 01/25/20 | NY | B&G Indoor Track&Field | Bullis Speed Invitational |
| 02/03/20 | NY | B&G Indoor Track&Fiels | NJ Varsity Classic |
| 02/08/20 | NY | B&G Indoor Track &Field | NYRR Millrose Games |
| 02/18/20 | NY | B&G Indoor Track&Field | Eastern States Championships |
| 04/09/20 | SC | Boys Golf | Palmetto HS Golf Championships Approved for CIAC member schools |