Earth Day Challenge
April 22
| Name | Age | Location | Country | Affiliation | Distance |
|---|---|---|---|---|---|
| Serena Martino | 41 | Maastricht | NED | 5,000 | |
| Mark Martino | 70 | USA | 6,018 | ||
| Daniel Martyn | 38 | St Thomas, ON | CAN | 6,079 | |
| Andrey Martynovich | 60 | AIN | 16,000 | ||
| Nicole Marud | 52 | CAN | Fit Chick | 6,190 | |
| Gabriela Marunova | 48 | Beijing-China | SVK | 43,266 | |
| Jarle Marvik | 36 | Kongsvinger | NOR | 33,166 | |
| Neil Marwood | 53 | GBR | 5,839 | ||
| Scott Marx | 31 | Windermere | USA | Live2Row Studios | 19,176 |
| Janice Marx | 64 | USA | Live2Row Studios | 5,000 | |
| William Marzullo | 24 | USA | 12,401 | ||
| Jan Masar | 49 | Prague | CZE | 19,107 | |
| Stephen Mascall | 35 | GBR | 5,732 | ||
| vernon mascall | 65 | Westbourne | GBR | 10,617 | |
| Zack Masci | 26 | CAN | 21,046 | ||
| Massimo Masi | 58 | ITA | 65,149 | ||
| Patrick Masiewicz | 56 | MI | USA | 10,021 | |
| alyssa masiewicz | 21 | USA | 5,339 | ||
| Mikhail Maslov | 59 | Cary, NC | USA | The Diamonds (Over Sixties Erging Group) | 6,730 |
| Ian Mason | 60 | Newquay | GBR | 5,016 | |
| Jim Mason | 60 | Charles Town, WV | USA | 5,000 | |
| Jeff Mason | 52 | Brentwood, TN | USA | 12,015 | |
| Neil Mason | 55 | GBR | 5,914 | ||
| David Mason | 41 | USA | 10,848 | ||
| Dominic Mason | 58 | GBR | 10,154 | ||
| Bill Massar | 58 | Mount Pleasant, SC | USA | U.S. Navy Veteran | 5,132 |
| Peter Massarelli | 62 | Charlottesville, VA | USA | OneWorld Rowing (1WR) | 6,226 |
| Ivan Massetti | 41 | GIB | 15,000 | ||
| Patrick Massey | 57 | HAARLEM | NED | 16,000 | |
| Howard Massey | 56 | USA | 8,059 | ||
| William Massimini | 34 | Edmond, OK | USA | Potomac Boat Club | 12,877 |
| Francine Masson | 61 | CAN | 5,019 | ||
| Sander Mast | 48 | NED | 5,000 | ||
| Charlotte Masters | 54 | GBR | Cornish Pilot Gig Rowers | 5,064 | |
| Craig Masters | 56 | Dunedin | NZL | 5,122 | |
| Steve Matcha | 57 | USA | 10,000 | ||
| radu mateev | 35 | ROU | 7,188 | ||
| Paweł Mateńko | 49 | Warszawa | POL | Polish Indoor Rowing Team | 8,029 |
| Ginger Matera | 75 | IN | USA | Earlham College - Richmond, Indiana | 4,614 |
| Noah Mathai | 23 | USA | PNRA/Mercer | 14,225 | |
| Michael Mathay | 57 | NJ | USA | 4,424 | |
| Don Matheny | 63 | Snohomish, WA | USA | 5,754 | |
| Noris Matherson | 60 | USA | 4,568 | ||
| David Matheson | 77 | Sydney | AUS | 10,000 | |
| Travis Matheson | 55 | Olympia, WA | USA | 15,000 | |
| Maureen Mathews | 50 | VA | USA | 5,011 | |
| Frank Mathews | 52 | Dubai | UAE | 6,910 | |
| Lamidel Mathias | 38 | FRA | 8,547 | ||
| Garett Mathiason | 44 | Warman, SK | CAN | 11,315 | |
| simon mathys | 43 | SUI | 10,840 |