Organizers
- Milwaukee Youth Symphony Orchestra
- Mimanagish - Singing Waters MT
- Mini Mountain - School of Skiing and Snow Boarding
- Minneapolis Park and Recreation Board
- Minnesota Dance Theatre
- Miracle League of Connecticut Inc.
- Miracle League of Southeastern Connecticut
- Miss Jennie's Performing Arts Studio
- Mission Marlins Swim Club
- Mission Montessori Athletics
- Mission Montessori Schools
- Mississippi Tennis Association
- Mississippi University for Women
- Missouri Baptist University
- Missouri City Parks and Recreation Department
- MN Hockey Camps
- MN Realty School
- MOCA Jacksonville
- Monahans Chamber of Commerce
- Montana Outdoor Science School
- Monte Lynch Coaching
- Monterey Park Recreation and Parks
- Montessori Academy of Chicago
- Montessori Children’s House of Nantucket, Inc
- Montessori in Redlands
- Montgomery County Parks and Recreation
- Montgomery TennisPlex
- MONTGOMERY VILLAGE FOUNDATION- INC.
- Monthaven Arts and Cultural Center
- Monument Marathon
- Moreno Valley Road Runners Club
- Morgan Park Academy
- Morningside Little League
- Morocco All Races
- Morro Bay Recreation
- Mote Marine Laboratory
- Motiv Sports US
- Mount Desert Island Adult and Community Education
- Mount Pleasant Christian Church
- Mount Royal University
- Mount St. Marys University
- Mountain Air Productions
- Mountain Alliance
- Mountain House Flag Football
- MRU Cougars Athletics and Recreation
- MS54 After School Club Program
- MSAD #44 Adult & Community Education
- MSAD 52 Adult & Community Education
- MSAD 54 Adult & Community Education
- MSport Active
