Organizers
- California Waterfowl Association - Hunt Program
- California Yacht Club
- California Youth Shooting Sports Association
- Callanwolde Fine Arts Center
- Callippe Preserve
- Calli's Swim Trainer
- Caloosa Riders Bicycle Club
- Calumet Memorial Park District
- Calumet Park - Parks + Recreation Department
- Calvary Baptist Church
- Calvary Baptist Church Academy
- Calvary Christian Academy
- Calvary Summer Day Camp
- Calvary Temple Church
- 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 Pickleball Club
- Cambridge Young Women's Christian Association
- Cambridge-Ellis School
- Camden Country Club
- Camden Music School, Inc
- Camden PTO
- 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
