Organizers
- Robert Wu Org1
- Robert Wu Org12
- Robertsdale Rotary Club Foundation
- Robeson Road Runners
- ROBIN CHARLES COACHING
- Robin Hood Swim Team
- Robins Pacers
- Robinson Community Little League
- Robinson Girls Youth Softball Association
- Robinson Heart and Minds Foundation
- Robinson Ranch
- Robinson Tennis Center
- RobotCity Workshop West
- Robotic Explorers
- Robotics and Things, Inc.
- ROC Limited
- ROC Race
- ROC Race
- Roc Solid Foundation
- Roca Motion
- Rochester Area Neighborhood House
- Rochester Area Triathletes
- Rochester Catholic Schools
- Rochester Public Library District
- Rochester Rotary Sunshine Camp
- Rock ‘n’ Kids, Inc.
- Rock ‘n’ Roll Marathon Portugal
- Rock ‘n’ Roll Marathon Series
- Rock Academy Summer Camps
- Rock and Roll Academy
- Rock and Roll Academy Roaring Fork
- Rock Climb Every Day, LLC
- Rock Creek 5k Run/Walk & Astro Dash 1k
- ROCK CREEK TENNIS CENTER
- Rock Garden Music School
- Rock Hill Striders
- Rock It Racing
- Rock Lake Activity Center
- Rock Lake Christian Assembly
- Rock 'n' Roll Camp for Girls
- Rock 'n' Roll Marathon
- Rock 'n' Roll Marathon Series
- Rock 'n' Roll Running Series USA
- Rock n Rope Adventures
- Rock Recovery
- Rock Solid Fitness
- Rock to the Future Inc.
- Rock Valley Recreation
- RockapulcoRun
- Rockaway Track Club / RockapulcoRun
