Organizers
- Michigan Half Marathon Race Series
- Michigan Hockey/Dekers
- Michigan NSA
- Michigan NSA
- Michigan NSA and the NSA Northern Zone
- Michigan Parkinson Foundation
- Michigan Running Foundation
- Michigan Swim Camp, LLC
- Michigan USSSA
- Michigan Volleyball Camps
- Michigan Water Polo Camp
- Michigan Women’s Golf Camp
- Michigan Women's Soccer Camp
- Michigan Wrestling Camps
- Michigan Youth Arts
- Micke Grove Zoological Society
- Mid America Sports
- Mid America Sports
- Mid Atlantic Field Hockey
- Mid Hudson Heatwaves
- Mid Maryland Triathlon Club
- Mid Valley Youth Baseball
- Mid-Atlantic Elite Soccer Camps
- MidAtlantic Physiological Assessment Center
- MID-CAPE ATHLETIC CLUB
- Midcoast Recreation Center
- Mid-Coast School of Technology SkillsUSA
- MIDDLE & WEST TN USSSA FASTPTICH
- Middle Atlantic PGA
- Middle Atlantic PGA Section
- Middle Creek Montessori
- Middle Point AmVets 698 Run for Warriors 5k Run / Walk
- Middle Tennessee State University
- Middleburgh Library Association
- Middlebury Aquatic Club
- Middlebury Area Land Trust
- Middlebury Interactive Languages
- Middlebury Racquet Club
- Middlesex Platform Tennis
- Middlesex Tennis
- Middlesex Youth Camp
- Middleton Elementary PTO
- Middleton Middle school courts
- Middleton Recreation Division
- Middleton United Soccer Club
- Middleton Yahara Soccer Club
- Middletown Tennis Association
- Middletown Youth PWF
- Midlakes ASA Softball
- Midland Athletic Co. Timing & Events
