Start list: 2025 Tartan Ottawa International Marathon, men’s invited field
As of April 1, 2025
| First Name | Last Name | Age | Country | PB | |
| Time | City/Year | ||||
| Laban | Mutai | 37 | Kenya | 2:06:40 | Eindhoven / 2019 |
| Belay | Tilahun | 30 | Ethiopia | 2:06:58 | Sevilla / 2025 |
| Abdi Ali | Gelchu | 27 | Ethiopia | 2:07:15 | Sevilla / 2022 |
| Rory | Linkletter | 28 | Canada | 2:08:01 | Seville / 2024 |
| CJ | Albertson | 31 | USA | 2:08:17 | Chicago / 2024 |
| Shadrack | Kimining | 29 | Kenya | 2:08:29 | Houston / 2025 |
| Wisley | Kimeli | 25 | Kenya | 2:08:33 | Lisbon / 2024 |
| Laban | Kipkemboi | 47 | Canada | 2:08:38 | Seoul / 2007 |
| John | Langat | 31 | Kenya | 2:09:08 | Eindhoven / 2019 |
| Adamu | Getahun | 25 | Ethiopia | 2:11:24 | Frankfurt / 2023 |
| Demeke | Tesfaye | 24 | Ethiopia | 2:11:48 | Amsterdam / 2025 |
| Vincent | Kiprono | 24 | Kenya | 2:11:49 | Hong Kong / 2025 |
| Blair | Morgan | 31 | Canada | 2:17:36 | Sacramento / 2019 |
| Sergio | Raez Villanueva | 28 | Canada | 2:18:04 | Toronto / 2022 |
| Kevin | Coffey | 38 | Canada | 2:20:22 | Toronto / 2019 |
| Arnaud | Francioni | 30 | Canada | 2:25:48 | Ottawa / 2024 |
| Daniel | Zwedu | 30 | Canada | Debut | |
*List subject to change.