Organizers
- Backcourt Club of Fergus Falls, Inc.
- Backyard Kids' Theater
- Bad Axe Little League
- Bad to the Bone Sports
- Badminton Alberta
- Bahamas Roadmasters - Bahamas Half Marathon & 10K
- Bajoit Tennis Academy
- Balanced Art Multisport
- Baldwin Wallace University Professional Development
- Baltimore Bicycling Club
- Baltimore Woods Nature Center
- BandWorks
- Bangor Adult Education
- Bangor Swimming Club
- Barre Community Baseball & Softball
- Bartons Back Alley Range
- BASIS Independent Bellevue
- BASIS Independent Bothell
- BASIS Independent Brooklyn
- BASIS Independent Dublin
- BASIS Independent Fremont
- BASIS Independent Manhattan
- BASIS Independent McLean
- BASIS Independent Silicon Valley
- Basketball Stars of America AAU
- Bay Saint Louis Running Company
- Baylor University - Football
- Baylor University Spirit Squads
- Baylor University Student Foundation
- Bayou Country Cyclists
- BBAC
- BCA Elite
- BCIT Recreation Services
- BCT Brooklyn Children's Theatre Inc
- Beacon Hill Career Training
- Beacon Performing Arts Center, Ltd.
- Bear Foot Sports
- Beck Center for the Arts
- Belaire High School Alumni Association
- Bellflower Parks & Recreation Department
- BELLINGHAM PARKS & RECREATION
- Belmont Parks and Recreation
- Beltsville Adventist School
- Bend Endurance Academy
- Bennett Park and Recreation District, CO
- Berea Recreation Department
- Berkeley Art Studio
- Berkley Hoops Youth Basketball Association
- Berlin Little League
- Bermuda Gymnastics Association
