Organizers
- U Bar U Camp and Retreat Center
- U CAN 5k
- U.C.C of St. Augustine
- U.S. Elite Volleyball, LLC
- U.S. National Arboretum
- UAB Baseball
- UAB- Equal Access Birmingham
- UBarU Camp and Retreat Center
- UBC Geering Up Applied Science Outreach
- UBC Geering Up Engineering Outreach
- UBC Okanagan Athletics and Recreation Department
- Uber Academic - Summer Day Camp
- UberCamp - Summer Day Camp
- Uberthons
- UBG Cycling CLub
- UBIC
- UC Davis Triathlon Club
- UC Santa Cruz
- UCBearcatVolleyballCamp
- UCCS Recreation and Wellness Center
- UCLA Golf Camp
- UCLA Sports Camps
- UCLA Staff Assembly
- UConn Medical School
- UCSB Triathlon Team
- UE Youth Programs
- UF SCAVMA
- UF/IFAS Nature Coast Biological Station
- UFIT Urban Fitness Pte Ltd
- UGA Ext FACS
- UGA Insect Zoo
- UGA Soccer Camp
- Ugandan Water Project
- Ugly Sweater Runs
- UIC Athletic Camps
- UIC Soccer Camps
- UIW Athletic Facilities
- UIW Sports and Wellness
- UK Boys Soccer Tour
- Uke Crazy
- UL Lafayette Baseball
- UL Lafayette Football
- UL Lafayette Men's Basketball
- UL Lafayette Men's Tennis
- UL Lafayette Soccer
- UL Lafayette Softball
- UL Lafayette Track & Field
- UL Lafayette Women's Basketballl
- UL Rec Sports
- Ulbfit
