Organizers
- Robinson Ranch
- Rochester Public Library District
- Rochester Rotary Sunshine Camp
- Rock Academy Summer Camps
- Rock and Roll Academy Roaring Fork
- Rock Recovery
- Rock Solid Fitness
- Rockaway Track Club / RockapulcoRun
- Rocky Mountain Diving Club
- Rod Ray Tennis Camp
- Rogers Activity Center
- Rose Academy of Ballet
- Rose Bowl Aquatics Center
- Rose Capital East Little League
- Rose Hill Recreation Commission
- Rotary Club of Cloverdale
- ROTARY CLUB OF HISTORIC BROWNSVILLE
- Rotary Club of Pisgah Forest
- Round Rock Tennis Association
- Rovers
- Royal Bermuda Yacht Club
- RSU 19 Adult Education
- RSU 24 Adult Education
- RSU 25 Adult and Community Education
- RSU 3 Adult Education
- RSU13 Adult & Community Education
- RSY-Netzer
- Rubio Long Snapping
- Ruble Triathlon
- Ruby Hill Aquatics
- Ruby Ranch Barn
- Run 2 Be Fit
- Run 4 Wales
- Run For It! Productions
- Run for Joy
- Run like a Diva
- Run Mfg, Inc.
- Run With It, Inc
- Runcarrera TEAM
- runinspirations.org(3)
- Runner's Depot
- Runner's Paradise Inc.
- Runners2life & Runinspirations. (2)
- Running 505
- Runwithpaula Events, Inc.
- RUSH Basketball Club
- Russell Martin Foundation
- Rutgers Football Camp
