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 |
| 11/19/19 | NY | Boys Basketball | NY Holiday Invitational |
| 12/20/19 | CT | Indoor Track | Hillhouse Invite also 12-21-19 |
| 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 |
| 12/27/19 | NY | Wrestling | 62nd Annual Christmas Tournament also 12-28-2019 |
| 12/27/19 | CT | Boys Basketball | Fitch HS Holiday Boys Basketball Tournament |
| 12/28/19 | MA | B&G Track and Field | Distance Classic |
| 12/30/19 | MA | Wrestling | Phil Tomkiel Holiday Tournament |
| 01/04/20 | MA | Wrestling | Falcon Duals |
| 01/04/20 | CT | Wrestling | Ray Southland Duals |
| 01/04/20 | NY | Wrestling | West Islip Dual Meet Tournament |
| 01/11/20 | NY | B&/g Track and Field | Stanner James |
| 01/11/20 | NY | Cheerleading | Warriors Ultimate Cheerleading Competition |
| 01/18/20 | NY | B & G Basketball | LUHI Basketball Showcase |
| 01/25/20 | CT | Wrestling | 2020 Ridgefield Challenge |
| 01/25/20 | CT | Indoor Track | Hilhouse Track Classic |
| 01/25/20 | CT | Wrestling | Connecticut 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 |
| 12/21/19 | NH | Boys Wrestling | Londondery Holiday tournament |
| 12/21/19 | NY | Girls Basketball | Hoops4Hearts 2019 |
| 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 |
| 12/31/19 | NY | B&G Indoor Track&Field | Bullis New year's Challenge |
| 01/02/20 | NY | Indoor Track&Field | Armory Hispanic Games |
| 01/03/20 | ME | Wrestling | SWAT Also 1-4-20 |
| 01/03/20 | ME | Wrestling | SWAT |
| 01/04/20 | NY | B&G Indoor Track&Field | Ocean Breeze Freedom Games |
| 01/08/20 | NY | B&G Indoor Track &Field | NYRR Millrose Trials |
| 01/10/20 | NY | Wrestling | Eastern States Classic |
| 01/10/20 | CT | B&G Indoor Track & Field | Yale Interscholastic Track Classic Also 1-11-20 |
| 01/10/20 | CT | B&G Indoor Track&Field | Yale Interscholastic Track Classic |
| 01/11/20 | RI | B&G Indoor Track & Field | URI Classic |
| 01/11/20 | NH | B&G Indoor Track & Field | Dartmouth Relays Also 1-12-20 |
| 01/11/20 | NH | B&G Indoor Track&Field | Dartmouth Relays |
| 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 |
| 01/17/20 | RI | B&G Indoor Track & Field | East Coast Invitational |
| 01/17/20 | RI | B&G Indoor Track & Field | Rhode Island Classic |
| 01/25/20 | NY | B&G Indoor Track&Field | Bullis Speed Invitational |
| 01/25/20 | NY | B&G Indoor Track | Ocean Breeze Invitational Approved for Jan 25 ONLY. Not approved for Sunday Jan 26 |
| 01/25/20 | NH | Wrestling | Timberlane Wrestling Invitation |
| 01/25/20 | NY | G&B Indoor Track&Field | Dr. Sander Invitational Columbia Challenge |
| 01/25/20 | NY | B & G Indoor Track | Dr. Sander Invitational |
| 01/29/20 | CT | G&B Indoor Track&Field | New England Championship |
| 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 |
| 02/23/20 | FL | Softball | Disney Softball Spring Training Approved fr practice effective March 21 for CIAC member schools. Cheshire Academy, Hopkins School, King School, Marianapolis Prep, St. Luke's School, Taft School and Westminster School are not CIAC member schools. |
| 02/23/20 | FL | Baseball | Disney Baseball Spring Training Approved for practices starting March 21 for CIAC member schools only. Hopkins School, John Jay, King School and St. Luke's School are not CIAC member schools until April 4 |
| 02/29/20 | MA | B & G Indoor Track | New England Indoor Track Championship |
| 02/29/20 | CT | B&G Indoor Track&Field | New England Championship |
| 03/07/20 | CT | Girls Gymnastics | New England Championship |
| 04/04/20 | RI | B&G Outdoor Track&Field | 52nd Annual Rhode Island Knights of Columbus Four Mile Relay |
| 04/09/20 | SC | Boys Golf | Palmetto HS Golf Championships Approved for CIAC member schools |
| 04/10/20 | SC | B&G Outdoor Track&Field | Bojangles Track and Field Classic |
| 04/18/20 | MD | B&G Outdoor Track&Field | 15th Annual Viking Invitatonal |
| 04/18/20 | DE | B&G Outdoor Track&Field | Art Madric Hall of Fame Invite |
| 04/18/20 | RI | Boys Volleyball | 2020 Rhody Invitational |
| 05/07/20 | NY | B&G Outdoor Track&Field | Glenn D. Loucks Games |
| 06/13/20 | CT | B&G Outfoor Track&Field | New England Championship |
| 06/24/20 | CT | B&G Golf | New England Championship |