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 |
| 09/08/18 | NY | Girls Volleyball | Early season volleyball tournament |
| 09/08/18 | MA | Boys & Girls Cross Country | Vineyard Cross Country Invitational |
| 09/08/18 | CT | Girls Volleyball | Early Season Volleyball Tournament |
| 09/15/18 | CT | Cross Country | Wilton Cross Country Invitational |
| 09/15/18 | NY | Boys & Girls Cross Country | Saffern Invitational |
| 09/18/18 | CT | Cross Coutry | Stratton Brook Invitational |
| 09/22/18 | MA | Boys & Girls Cross Country | 23rd Annual Cross Country Invitational |
| 09/29/18 | MA | Boys & Girls Cross Country | MSTCA Frank Kelley Invitational |
| 09/29/18 | NY | Girls Volleyball | 2018 NY-CT Invitational |
| 09/29/18 | NY | Girls Volleyball | John Jay Cross River |
| 10/06/18 | VT | Boys & Girls Cross Country | Woods Trail |
| 10/06/18 | NY | Boys & Girls Cross Country | 41St Annual Brewster Bear Classic |
| 10/13/18 | CT | Girls Volleyball | CT Fall Brawl |
| 10/19/18 | MA | Boys & Girls Cross Country | MSTCA Twilight Invitational Also 10-20-18 |
| 12/08/18 | NH | Boys Basketball | Pinkerton Academy New England Boys' Varsity Basketball Jamboree |
| 12/14/18 | NY | Girls Basketball | Holiday Classic also 12/15/2018 |
| 12/14/18 | CT | Indoor Track | Hillhouse Invite also 12-15-2018 |
| 12/22/18 | CT | Wrestling | Blue Knight Duals |
| 12/22/18 | MA | Boys Basketball | BasketBull HoopsFest |
| 12/27/18 | NY | Girls Basketball | Amsterdam Holiday College Showcase |
| 12/27/18 | MA | Wrestling | Holiday Wrestling Tournament |
| 12/27/18 | MA | Wrestling | Holiday Wrestling Tournament |
| 12/29/18 | MA | Wrestling | Phil Tomkiel Tournament |
| 01/05/19 | MA | Wrestling | Falcon Invitational |
| 01/05/19 | NY | Wrestling | Murphy-Guccione Shoreline |
| 01/05/19 | MA | Wrestling | Tiger Duals |
| 01/19/19 | MA | Wrestling | 2019 Springfield Central Wrestling Festival |
| 01/26/19 | CT | Wrestling | Connecticut Challenge |
| 01/26/19 | CT | Wrestling | 2019 Ridgefield Challenge |
| 02/02/19 | MA | Wrestling | Southwick Duals |
| 02/16/19 | NH | Spirit | AstroBlast |
| 04/18/19 | CT | Outdoor Track&Field | Connecticut Distance Festival |
| 10/12/19 | CT | Girls Volleyball | CT Fall Brawl |
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 |
| 09/08/18 | PA | Boys & Girls Cross Country | PTXC10 |
| 09/22/18 | RI | Boys & Girls Cross Country | Ocean State XC Invitational |
| 09/22/18 | CT | Cross Country | Winding Trails Cross Country Invitational |
| 09/22/18 | NH | Boys & Girls Cross Country | 44th Manchester Invitational |
| 09/22/18 | NY | Boys & Girls Cross Country | 2018 Bowdoin Park Cross Country Classic |
| 09/29/18 | PA | Cross Country | Lehigh University Paul Short Run |
| 09/29/18 | NY | Boys & Girls Cross Country | McQuaid Invitational |
| 10/06/18 | NC | Boys & Girls Cross Country | Great American Cross Country Festival |
| 10/06/18 | VT | Boys & Girls Cross Country | Wood Trail |
| 10/06/18 | CT | Cross Country | Wickham Invitation |
| 10/06/18 | NJ | Boys and Girls Cross Country | Shore Coaches Invitational 9:00 a.m. |
| 10/08/18 | MA | Girls Volleyball | International Volleyball Hall of Fame's VolleyHall Classic |
| 10/13/18 | NY | Boys & Girls Cross Country | Manhattan College High School Cross-Country Invitational |
| 10/13/18 | RI | Girls Volleyball | Rhody Invitational Girl's Volleyball Tournament |
| 10/20/18 | RI | Boys & Girls Cross Country | Northeast Cross Country Championship |
| 11/10/18 | CT | Boys and Girls Cross Country | New England Championship |
| 12/14/18 | NY | Boys&Girls Indoor Track and Field | Coach Saint Invitational |
| 12/15/18 | NY | Boys&Girls Indoor Track | Armory Coaches Hall of Fame Invitational |
| 12/15/18 | NH | Wrestling | Londonderry Holiday Invitational Wrestling Tournament |
| 12/21/18 | NY | Boys&Girls Indoor Track | Jim Mitchell Invitational |
| 12/22/18 | NY | Girls Basketball | Hoops4Hearts 2018 Sunday participation is prohibited |
| 12/26/18 | ME | Ice Hockey | St. Dom's Christmas Classic |
| 12/26/18 | NY | Boys&Girls Indoor Track | North Shore High School Track and Field Invitational |
| 12/27/18 | RI | Boys Ice Hockey | Mount St. Charles Holiday Face-Off 2:00 p.m. |
| 12/27/18 | MA | Wrestling | George Bossi Lowell Holiday Invitational |
| 12/27/18 | RI | B&G Indoor Track&Field | Rhode Island Classic |
| 12/27/18 | FL | G&B Basketball | KSA Events holiday Basketball Tournament |
| 12/27/18 | NJ | G&B Basketball | Skyline Classic |
| 12/29/18 | NY | Boys&Girls Indoor Track | Marine Corps Holiday Classic |
| 12/30/18 | NY | Boys&Girls Indoor Track | Ocean Breeze Holiday Festival |
| 01/04/19 | NY | Boys and Girls Indoor Track | 25th Armory Hispanic Games |
| 01/04/19 | NJ | Girls Basketball | A New Year's Resolution Tournament |
| 01/05/19 | RI | Boys&Girls Indoor Track | URI Classic |
| 01/05/19 | NY | Boys&Girls Indoor Track | Ocean Breeze Freedom Game Day 1 |
| 01/09/19 | NY | Boys&Girls Indoor Track | NYRR Millrose Trials |
| 01/11/19 | NY | Boys Wrestling | Eastern States Classic |
| 01/11/19 | NH | B&G Indoor Track&Field | 2019 Dartmouth Relays |
| 01/17/19 | MA | Boys&Girls Basketball | Basketball Hall of Fame's Hoophall Classic |
| 01/18/19 | NY | Boys and Girls Indoor Track | 24th New Balance Games |
| 01/18/19 | RI | B&G Indoor Track&Field | East Coast Invitational |
| 01/18/19 | NY | Girls Basketball | Rose Classic Super Jam Approved for Capital Prep ONLY |
| 01/19/19 | NH | Wrestling | Timberlane Wrestling Invitation |
| 01/20/19 | NY | B&G Basketball | Big North Shootout |
| 01/25/19 | NY | Boys&Girls Indoor Track | Dr. Sander Columbia Challenge |
| 01/25/19 | NY | Girls Basketball | The Mecca Approved for Capital Prep Only! |
| 01/26/19 | NY | Boys$Girls Indoor Track | Bullis invitational |
| 02/04/19 | NY | B&G Indoor Track&Field | Varsity Classic |
| 02/09/19 | NY | Boys and Girls Indoor Track | 112th NYRR Millrose Games |
| 02/15/19 | NY | Boys&Girls Indoor Track | North Shore High School Pre-National Invitational |
| 02/19/19 | NY | B&G Indoor Track&Field | Eastern State Championships |
| 02/23/19 | NY | Boys&Girls Indoor Track | Purple Champions Track Club Last Chance Invitational |
| 02/24/19 | FL | Boys&Girls Lacrosse | 2019 Disney Lacrosse Spring Training |
| 02/24/19 | FL | Baseball | 2019 Disney Baseball Spring Training |
| 03/01/19 | CT | Wrestling | New England Championship |
| 03/02/19 | CT | B&G Indoor Track&Field | New England Championship |
| 03/09/19 | CT | Gymnastics | New England Championship |
| 04/05/19 | SC | B&G Outdoor Track&Field | Beach Run Invitational |
| 04/05/19 | CA | B&G Outdoor Track&Field | Tiger Invite @ South Pasadena |
| 04/05/19 | CA | B & G Outdoor Track & Field | Arcadia Invitational |
| 04/06/19 | RI | B&G Outdoor Track&Field | 51st Annual RI Knights of Columbus Four Mile Relay |
| 04/13/19 | MD | B&G Outdoor Track&Field | 14th Annual Viking Invitational |
| 04/15/19 | SC | Baseball | Ripken Experience Spring Classic |
| 04/18/19 | SC | Boys Golf | Palmetto High School Golf Championships |
| 04/20/19 | DE | B&G Outdoor Track&Field | Art Madric Hall of Fame Invitational |
| 04/27/19 | RI | Boys Volleyball | 2019 Rhody Invitational |
| 04/27/19 | NY | Boys Lacrosse | GEICO High School Lacrosse Showcase |
| 05/03/19 | VA | G&B Outdoor Track&Field | Dogwood Track Classic |
| 06/08/19 | CT | B&G Outdoor Track&Field | New England Championship |
| 06/19/19 | CT | B&G Golf | New England Championship |
| 09/20/19 | CA | B&G Cross Country | 2019 Woodbridge Cross Country Classic |
| 09/28/19 | RI | B&G Cross Country | Ocean State Cross country Invitational |