| Matthew's Bicycle Mart | Bike Shop |  | IN | Indianapolis | 2 |
| Matzman Et Merutz | Bike Shop | | | Tel Aviv | 7 |
| Maude Coffee | Other | | | Leeds | 0 |
| Maui Cyclery | Bike Shop | | HI | Paia | 2 |
| Maui Mountain Bike Coalition | Trail Association | | HI | Pukalani | 0 |
| Maul's Bike Shop | Bike Shop | | MA | Halifax | 7 |
| Maus Law Firm | Other | | FL | Fort Lauderdale | 0 |
| Maverick's Square Adaptive Cyclery | Bike Shop | | NH | Amherst | 4 |
| Maxxbikeeldorado | Bike Shop | | | Latsch | 1 |
| Maxxoponyrowerowe | Bike Shop | | | Szczecin | 27 |
| Maydena Bike Park | Trail Association | | | Maydena | 0 |
| Mayhemsport | Bike Shop | | | Bergen | 21 |
| MB Swindon | Trail Association | | | Swindon | 5 |
| MBC-Club Bochum e.V. | Club | | | Bochum | 0 |
| MBF Haut Languedoc | Trail Association | | | Mons | 4 |
| MBF Massif des Vosges | Trail Association | | | Strasbourg | 3 |
| Mbike | Bike Shop | | | Kraków | 120 |
| mbike Kraków | Bike Shop | | | Kraków | 0 |
| Mborg Products | Bike Shop | | | München | 0 |
| MBR Services - Sam's Bmx Shop | Bike Shop | | ON | Mississauga | 2 |
| Mbstore | Bike Shop | | | Santiago | 17 |
| Mbw | Bike Shop | | | Galway | 34 |
| Mbw Tullamore | Bike Shop | | | Tullamore | 5 |
| Mc. Bike | Bike Shop | | BC | Smithers | 11 |
| Mcconvey's Cycles | Bike Shop | | | Belfast | 8 |
| McCrank's Cycles & Skis | Bike Shop | | ON | Ottawa | 1 |
| Mccully Bicycle | Bike Shop | | HI | | 1 |
| Mccully Bicycle & Sporting Goods | Bike Shop | | HI | | 4 |
| McCully Heritage Project | Trail Association | | IL | Kampsville | 0 |
| McDowell Mountain Cycles | Bike Shop | | AZ | Fountain Hills | 0 |
| McFab Trail Association | Trail Association | | | Vrede | 0 |
| McGhie's Ski, Bike, and Board - Blue Diamond | Bike Shop | | NV | Blue Diamond | 8 |
| McGhie's Ski, Bike, and Board - Vegas | Bike Shop | | NV | Las Vegas | 4 |
| McGhie's Ski, Bike, and Board -Henderson | Bike Shop | | NV | Henderson | 2 |
| McGill Trail Fabrication LTD | Trail Builders | | CO | Silverthorne | 7 |
| MCH Heubach e.V. Freeridecrew | Trail Association | | | Heubach | 1 |
| McHenry County Conservation District | Trail Association | | IL | Woodstock | 0 |
| McIntosh Run Watershed Association | Trail Association | | NS | Halifax | 11 |
| Mclain Cycle & Fitness | Bike Shop | | MI | Traverse City | 6 |
| McLean Projects | Trail Builders | | | Townsville | 2 |
| McMullen Cove Trails Committee | Trail Association | | AL | Gurley | 1 |
| Mcphail's | Bike Shop | | ON | Kitchener-Waterloo | 19 |
| McQueens Valley Mountain Bike Club | Trail Association | | | Christchurch | 4 |
| McSporties | Bike Shop | | BC | Sun Peaks | 0 |
| Mead's Bike Shop | Bike Shop | | IL | | 1 |
| Meadow Vista Trail Association | Trail Association | | CA | Meadow Vista | 0 |
| MEC (Mountain Equipment Co-op) Barrie | Bike Shop | | ON | Barrie | 4 |
| MEC (Mountain Equipment Co-op) Burlington | Bike Shop | | ON | Burlington | 2 |
| MEC (Mountain Equipment Co-op) Calgary | Bike Shop | | AB | Calgary | 32 |
| MEC (Mountain Equipment Co-op) Edmonton | Bike Shop | | AB | Edmonton | 14 |
| MEC (Mountain Equipment Co-op) Halifax | Bike Shop | | NS | Halifax | 3 |
| MEC (Mountain Equipment Co-op) Kelowna | Bike Shop | | BC | Kelowna | 1 |
| MEC (Mountain Equipment Co-op) Kitchener | Bike Shop | | ON | Kitchener-Waterloo | 1 |
| MEC (Mountain Equipment Co-op) Langley | Bike Shop | | BC | Langley | 1 |
| MEC (Mountain Equipment Co-op) Laval | Bike Shop | | QC | Laval | 2 |
| MEC (Mountain Equipment Co-op) London | Bike Shop | | ON | London | 1 |
| MEC (Mountain Equipment Co-op) Longueuil | Bike Shop | | QC | Longueuil | 2 |
| MEC (Mountain Equipment Co-op) Montréal | Bike Shop | | QC | Montreal | 1 |
| MEC (Mountain Equipment Co-op) North Vancouver | Bike Shop | | BC | North Vancouver | 24 |
| MEC (Mountain Equipment Co-op) North York | Bike Shop | | ON | North York | 1 |
| MEC (Mountain Equipment Co-op) Ottawa | Bike Shop | | ON | Ottawa | 2 |
| MEC (Mountain Equipment Co-op) Québec City | Bike Shop | | QC | Québec City | 1 |
| MEC (Mountain Equipment Co-op) South Edmonton... | Bike Shop | | AB | Edmonton | 1 |
| MEC (Mountain Equipment Co-op) Toronto | Bike Shop | | ON | Toronto | 1 |
| MEC (Mountain Equipment Co-op) Vancouver | Bike Shop | | BC | Vancouver | 18 |
| MEC (Mountain Equipment Co-op) Victoria | Bike Shop | | BC | Victoria | 16 |
| MEC (Mountain Equipment Co-op) Winnipeg | Bike Shop | | MB | Winnipeg | 1 |
| Mécanocycle Bike Shop | Bike Shop | | QC | Montreal | 8 |
| Mech Monkey | Bike Shop | | | Belfast | 1 |
| Medela MTB C. | Trail Association | | | San Cibrao | 0 |
| Medicine Bow Nordic Association | Trail Association | | WY | Laramie | 0 |
| Medicine Wheel Trail Advocates | Trail Association | | CO | Colorado Springs | 7 |
| Mediocre Mountain Descenders | Club | | CA | | 2 |
| Meehan Range Trail Groomers | Trail Association | | | Hobart | 1 |
| Mega Bikers | Bike Shop | | | Itupeva | 3 |
| Mega Cycles | Bike Shop | | FL | Sunrise | 1 |
| Meinrad-Trails | Trail Association | | | Einsiedeln | 1 |
| Mello Velo Bicycle Shop and Cafe | Bike Shop | | NY | Syracuse | 8 |
| Mellow Johnny's | Bike Shop | | TX | Austin | 8 |
| Mellow Johnny's - Fort Worth | Bike Shop | | TX | Fort Worth | 8 |
| Mellow Velo | Bike Shop | | NM | Santa Fe | 7 |
| melonbike | Bike Shop | | OK | Oklahoma City | 0 |
| Memphremagog Ski Touring Foundation | Trail Association | | VT | Newport | 1 |
| Memphremagog Trails | Club | | VT | Derby | 2 |
| Mena Open Trail Alliance | Trail Association | | AR | Mena | 0 |
| Menaggio Turismo | Other | | | Menaggio | 1 |
| Mendocino Coast Cyclists | Trail Association | | CA | Fort Bragg | 6 |
| Mendon Mountain Club | Trail Association | | VT | Mendon | 0 |
| Menifee Bicycles | Bike Shop | | CA | | 0 |
| Meniheck Nordic Ski Club | Club | | NL | Labrador City | 0 |
| Menlo Velo Bicycles | Bike Shop | | CA | | 2 |
| Mental Bikes | Bike Shop | | | Maasmechelen | 18 |
| Menter Bro Machno | Trail Association | | | Betws-y-coed | 6 |
| Mera Lera MTB | Club | | | Linköping | 0 |
| Meråker Sport og Fritid AS | Bike Shop | | | | 0 |
| Mercado Salvador | Other | | | Ibirama | 0 |
| Mercian Cycles | Bike Shop | | | Derby | 2 |
| Mere Mortals Mountain Bike Club | Club | | CA | Los Altos | 0 |
| MERIDA Concept Store & E-bike Test Center | Bike Shop | | | Budapest | 1 |
| Meridian Cycles | Bike Shop | | MS | Meridian | 10 |
| Meridian63° MTB | Guides & Tours | | PE | Strathgartney | 0 |
| Merkaz Shetach | Bike Shop | | | | 0 |
| Merlin Cycles | Bike Shop | | | Chorley | 17 |
| Merlin Cycles Ltd | Bike Shop | | | Chorley | 46 |
| Merrimack Valley NEMBA | Trail Association | | MA | Lowell | 1 |
| Merritt Mountain Bike Association | Trail Association | | BC | Merritt | 9 |
| Merry Pebbles | Other | | | Sabie | 1 |
| Mersey Mountain Bike Club | Trail Association | | | Devonport | 0 |
| Mesa Cycles | Bike Shop | | MO | St. Louis | 11 |
| Mesa de Yeguas Country Club Association | Trail Association | | | Bogota | 1 |
| Meshomasic Hiking Club | Trail Association | | CT | Portland | 0 |
| Messier Bicyclettes | Bike Shop | | QC | Saint-Jean-sur-Richelieu | 11 |
| Mestre Jingas | Bike Shop | | | Trofa | 0 |
| Metal Motion Bikes | Bike Shop | | | Witten | 3 |
| Metalmtn Cycling | Bike Shop | | CA | | 3 |
| Meteora e-Bike | Race/Event Organizer | | | Kalampaka | 0 |
| Methow Cycle & Sport | Bike Shop | | WA | Winthrop | 6 |
| Methow Valley Sport Trails Association | Trail Association | | WA | Winthrop | 2 |
| Metro Mountain Bikers | Trail Association | | WI | Milwaukee | 1 |
| Metrobikes | Bike Shop | | | Lublin | 2 |
| Metropolis Cycle Repair | Bike Shop | | OR | Portland | 5 |
| Metz 2RADFACHGESCHÄFT | Bike Shop | | | Davos | 0 |
| MexicoMTB - MTB Guiding and uplift service in... | Coaching & Camps | | | xalapa | 2 |
| Mfobmx | Bike Shop | | | Leiria | 58 |
| MG Cycle & Sport | Bike Shop | | CO | | 5 |
| MG Sport | Bike Shop | | | Tragwein | 0 |
| Miami Beach Bicycle Center | Bike Shop | | FL | Miami Beach | 2 |
| Miami Hawks MTB Club | Club | | FL | Miami | 0 |
| Miami Valley Mountain Bike Association | Trail Association | | OH | Dayton | 2 |
| Michael's Bicycles | Bike Shop | | CA | | 9 |
| Michael's Cycles | Bike Shop | | WI | Janesville | 2 |
| Michael's Cycles | Bike Shop | | MN | Prior Lake | 1 |
| Michigan Snowmobile and ORV Association | Trail Association | | MI | Wyoming | 0 |
| Michigan's Edge Mountain Biking Association | Trail Association | | MI | Muskegon | 4 |
| Michi_Guide | Guides & Tours | | | Engelberg | 0 |
| Michugan Riders | Club | | | | 0 |
| Mickey Cranks | Bike Shop | | | Witney | 0 |
| Mickledore Cycling Holidays | Guides & Tours | | | Keswick | 0 |
| Mid Indiana Trails | Trail Association | | IN | Muncie | 1 |
| Mid-Atlantic Off Road Enthusiasts (MORE) | Trail Association | | VA | Fairfax | 22 |
| Mid-Hudson Adirondack Mountain Club | Trail Association | | NY | Poughkeepsie | 0 |
| Mid-Michigan Mountain Biking Association (MMMBA) | Trail Association | | MI | Lansing | 4 |
| Mid-Minnesota Cycling Club | Trail Association | | MN | Saint Cloud | 0 |
| Mid-South Trails Association | Trail Association | | TN | Memphis | 1 |
| Midcoast Conservancy | Trail Association | | ME | Edgecomb | 0 |
| Midcoast Maine NEMBA Chapter | Trail Association | | ME | Rock Port | 1 |
| Middle Hill MTB | Shuttle Service | | | Kaikoura | 0 |
| Middle Hill MTB | Trail Association | | | Kaikoura | 0 |
| Middle of Town Cycling | Bike Shop | | KY | Louisville | 1 |
| Middle Ring Cycles | Bike Shop | | NC | Albemarle | 0 |
| Middlebury Area Land Trust | Trail Association | | VT | Middlebury | 0 |
| Middlesex Land Trust | Trail Association | | CT | Middletown | 1 |
| Middletown Cycling | Bike Shop | | KY | Louisville | 3 |
| Midland Cycles | Bike Shop | | | Brisbane | 0 |
| Midlands SORBA | Trail Association | | SC | Columbia | 4 |
| Midpeninsula Regional Open Space District | Trail Association | | CA | Los Altos | 2 |
| Midwest Cyclery | Bike Shop | | IL | Wheaton | 0 |
| Midwest Offroad | Race Team | | WI | | 1 |
| Midwest Trail Builders Coalition | Trail Association | | MO | Cape Girardeau | 1 |
| Mietcenter Bardill Sport | Bike Shop | | | Klosters | 0 |
| MIG / Oman Bicycle Shop | Bike Shop | | | Muscat | 0 |
| Mighty Riders | Bike Shop | | BC | Vancouver | 6 |
| Mike Vaughan Cycles | Bike Shop | | | Coventry | 3 |
| Mike Vaughan Cycles | Bike Shop | | | Kenilworth | 2 |
| Mike's Bike Garage | Bike Shop | | | Sarnthein | 0 |
| Mike's Bike Shop | Bike Shop | | NB | Dieppe | 71 |
| Mike's Bike Shop of Staten Island | Bike Shop | | NY | Staten Island | 1 |
| Mike's Bike Works Llc | Bike Shop | | NY | Cohoes | 0 |
| Mike's Bikes | Bike Shop | | CA | Walnut Creek | 1 |
| Mike's Bikes | Bike Shop | | CA | | 0 |
| Mike's Bikes | Bike Shop | | NV | Tonopah | 1 |
| Mike's Bikes | Bike Shop | | | Jessheim | 0 |
| Mike's Bikes - Berkeley | Bike Shop | | CA | Berkeley | 11 |
| Mike's Bikes - Los Gatos | Bike Shop | | CA | | 7 |
| Mike's Bikes - Palo Alto | Bike Shop | | CA | Palo Alto | 6 |
| Mike's Bikes - Petaluma | Bike Shop | | CA | Petaluma | 9 |
| Mike's Bikes - San Francisco | Bike Shop | | CA | San Francisco | 4 |
| Mike's Bikes - Sausalito | Bike Shop | | CA | | 3 |
| Mike's Bikes Of Gurnee | Bike Shop | | IL | Gurnee | 0 |
| Mike's Bikes Of Los Gatos | Bike Shop | | CA | | 5 |
| Mike's Bikes Of Palo Alto | Bike Shop | | CA | Palo Alto | 1 |
| Mike's Bikes Of Petaluma | Bike Shop | | CA | Petaluma | 2 |
| Mike's Bikes Of Sacramento | Bike Shop | | CA | | 6 |
| Mike's Bikes Of San Rafael | Bike Shop | | CA | | 2 |
| Mike's Bikes Of Sausalito | Bike Shop | | CA | | 3 |
| Mike's Hike and Bike London | Bike Shop | | KY | London | 0 |
| Mike's Tiki Bar | Other | | VT | East Burke | 0 |
| Mike's Velo City | Bike Shop | | CA | Winters | 0 |
| MIKEBIKE | Bike Shop | | | Ostrava | 2 |
| mikebikes | Bike Shop | | | Valparaiso | 0 |
| Mikes Bike Shop | Bike Shop | | IL | Palatine | 0 |
| Mikes Bikes | Bike Shop | | CA | | 11 |
| Mikes Bikes | Bike Shop | | CA | Petaluma | 4 |
| Mikes Bikes | Bike Shop | | GA | | 2 |
| Mikes Bikes and Beans | Bike Shop | | AB | Edmonton | 2 |
| Mikes Bikes Aviemore | Bike Shop | | | Aviemore | 2 |
| Mikes Bikes Corporate | Bike Shop | | CA | | 4 |
| Mikes Bikes San Jose | Bike Shop | | CA | San Jose | 5 |
| Mikes Hike And Bike | Bike Shop | | KY | Richmond | 6 |
| Milaca Trails Initiative | Trail Association | | MN | Milaca | 2 |