Organizers
- Calvert Memorial Hospital
- Calvin Christian Athletic Boosters
- Calvin College Summer Sports Camps
- Calvin Presbyterian Church
- Calvin Soccer Camp
- Cal-Wood Education Center
- Calzaghe Mini Dragon Limited
- Camanche Lil Indians
- Camarillo Rotary
- Camarillo YMCA
- Camarillo Youth Football Inc.
- Camas Meadows
- Camberley Athletics Club
- Cambrian Park Little League
- Cambrian Valley PW
- Cambridge 5K
- Cambridge Area YMCA Family Center
- Cambridge Community Activities Program
- Cambridge Cycling club
- Cambridge Isanti Competitive Baseball
- Cambridge MultiSport
- Cambridge Young Women's Christian Association
- Cambridge-Ellis School
- Camden Country Club
- Camden Music School, Inc
- Camden School for Girls
- Camelback Bible Church
- Camelot Challenge
- Camels Basketball Camps
- Cameron Park Community Services District
- Cameron Regional YMCA
- Cameron University
- Cameron University Forensics
- Cameron Veterans Home Assistance League
- Camino205
- CAML Academy
- Camlough Lake Water Festival
- Camp 4 Champs
- Camp 4 Kids
- Camp 42
- Camp 4-2-11
- CAMP 510
- Camp a Palooza
- Camp Adam Fisher
- Camp Adventura
- Camp Aerospace Maryland
- Camp Agape NW
- Camp AHA
- Camp AK
- Camp Al Haderech
