Organizers
- Bakersfield Southwest Baseball
- Bakersfield Triathlon
- Bakersville Volunteer Fire and Rescue
- Bala Golf Club
- Balance Studios LLC
- Balanced Art Multisport
- Balboa Tennis Club
- Balbriggan Cancer Support Group
- Balcones Country Club
- Bald Eagle Area Little League Softball
- Baldwin City Recreation Commission
- Baldwin County High School
- Baldwin Wallace University
- Baldwin Wallace University, STEM Community Programs
- Baldwinsville Pop Warner Little Scholars, Inc.
- Ballantrae Golf Club
- Ballantyne KidzArt
- Ballard County Wheels and Wings
- Ballard Soccer Club
- Ballet Chicago
- Ballina Triathlon Club
- Ballman/Morrison Elementary
- Ballpark Sports Baseball Inc.
- Ballston Spa Pop Warner, Inc.
- Ballston Spa United Methodist Church
- Ballwin Golf Club
- Ballycotton Swim
- Baltimore Bicycling Club
- Baltimore County Delta Foundation, Inc.
- Baltimore Fitness & Tennis
- Baltimore Kings Pro Soccer Club
- Baltimore Woods Nature Center
- Banbridge ASC
- Banbury Swimming Club
- Bandits Youth Foundation, Inc.
- Bandon Crossings Golf Course
- BandWorks
- Banebow
- Bangor Parks and Rec, Brewer Parks and Rec, Old Town Parks and Rec
- Bangor Swimming Club
- Bank of Holland
- Bank of the Sierra's Resolution Run
- Bantiox
- Baptist Health Paducah
- Baptist Healthplex @ MC
- Bar Harbour Camp
- Baraboo Lions
- Baraboo Parks and Recreation Department
- Barack Recreation Center
- Baraga County Memorial Hospital Rehab and Fitness Center
