Organizers
- Sudbury Laurentian Swim Club
- Sudden Impact
- Sudden Unexplained Death in Childhood Foundation
- Sue Momchilov 5K
- Suenos de Salsa
- Suffern Midget PW
- Suffolk Bicycle Riders Association
- Suffolk County Junior Tennis League
- Suffolk Youth Athletic Association Baseball
- Sugar Bowl Resort
- Sugar Bowl Ski Team
- Sugar Creek Golf Course, Villa Park IL
- Sugar Land Girls Softball Association
- Sugar River SC
- Sugar River Soccer Club
- Sugar Springs Golf Club
- Sugar Sweet Farm
- Sugarbush Resort Golf Club
- Sugarloaf Elementary - Pride Stride
- Suicide Prevention Australia
- Suisun City Recreation
- Sullivan Baseball League
- Sullivan High School DREAM Run
- Sullivan Proformance
- Sullivan University Summer Camp
- Sully Freedom Fun Run
- Sulphur Parks and Recreation
- Sum It Up Lacrosse
- SumMAT Camp (by Charest Alpinism LLC dba Petra Cliffs)
- Summer 10k Park Series
- Summer 10km Series
- Summer at Blake
- Summer at Inly
- Summer at St. Bart's
- Summer at St. John's
- Summer at Stanley British Primary School
- Summer at Tower Hill
- Summer Beach Club
- Summer Camp Advisory Team: IDEAS Camps | Rancho Camps
- Summer Camp Advisory Team: StemQuest Camps | IDEAS Camps | Rancho Camps
- Summer Camp at The Co-op School
- SUMMER CAMP with Mt. Adams Institute
- Summer Cooking Camp
- Summer Cooking Camp 2015
- Summer Culinary
- Summer Fit CAMP
- Summer in the Park
- Summer Institute at St. Joseph's College
- Summer of Surf
- Summer on the Prairie
