Organizers
- Rock'n the Farm
- RockSolidRace
- Rocktown Racing
- Rockwell Events
- Rockwood Golf Course
- Rocky Hill Triathlon
- Rocky Hollow Recreation Center
- Rocky Mountain Adventure Camp-Colorado State University Military Youth
- Rocky Mountain Bird Observatory
- Rocky Mountain Christian Camp
- Rocky Mountain Diving Club
- Rocky Mountain Hockey Schools
- Rocky Mountain Road Runners
- Rocky Mountain Soccer Camps, Inc.
- Rocky Mountain Triathlon Company
- Rocky Point Golf Course
- Rocky River Golf Club
- Rocky River Road Club
- Rocky Rush Cheerleading Club
- Rocky Trail Entertainment
- ROCLEMA
- Rod Ray Tennis Camp
- Rodelle Vanilla Day
- Roden Barnyard Adventures, LLC
- Rodeo Run 5K & 1-mile
- Rodeo Run 5K/10K
- Rodney Street Tennis RSTTA
- Rod's Golf Improvement Center Inc.
- Roger Scott Tennis Center and Tennis-4-Everyone
- Rogers Activity Center
- Rogers Community School Recreation Association
- Rogue Alpha Rush
- Rogue Valley Race Group
- Rogue Valley Swim & Tennis Club
- Roland Park K-8 Magnet PTSA
- Rolesville Athletic Club
- Roller Coaster Race
- Rolling Hills Club
- Rolling Hills Golf Club
- Rolling Meadows Park District
- Rolling Prairie Business and Community Association
- Rollingwood Athletic Club
- Roma Little League
- ROMAN CATHOLIC BASKETBALL
- Roman Runners
- Rome Dollars for Scholars
- Rome Girls Softball League
- Rome Tennis Management Group
- Rome-Floyd Parks and Recreation Authority
- Romeoville Revolution Starzz
