| Abbreviation | Definition |
|---|---|
| GWCM | Great Wall of China Marathon |
| HMDS | Half Marathon Des Sables |
| HMP | half marathon pace |
| HSMC | Humane Society of Marathon County |
| IBBM | Iron Brussels Beer Marathon |
| LAM | Los Angeles Marathon |
| LAMM | Lowe Alpine Mountain Marathon |
| LMEL | London Marathon Events Ltd |
| MAM | Marathon A Month |
| MBM | Monkey Ball Marathon |
| MCM | Marine Corps Marathon Marine Corps Marathon |
| MCMO | Marine Corps Marathon Organization |
| MdS | Marathon des Sables |
| MRCS | Marathon Residential and Counseling Services |
| MSM | Midnight Sun Marathon |
| MTP | Marathon Transport Protocol |
| MWM | Malaysia Women Marathon |
| NODM | North Olympic Discovery Marathon |
| NVM | National Vertical Marathon |
| OMM | Original Mountain Marathon |