Searched 18 events from May 13, 2017 to May 10, 2025
| Name | Gender | From | Finish Count |
|---|---|---|---|
| Kevin Macdonald | Male | Divide, CO | 1 |
| Margaret Macdonald | Female | Arvada, CO | 1 |
| Dave Mackey | Male | Boulder, CO | 1 |
| Gordon Macleod | Male | West Lafayette, IN | 1 |
| Mary MacLeod | Female | Loveland, CO | 1 |
| Brian Macpherson | Male | Louisville, CO | 3 |
| Ryan Mactaggart | Male | Greeley, CO | 1 |
| Brittany Maddock | Female | Leadville, CO | 1 |
| Joey Maestas | Male | Fort Collins, CO | 1 |
| Jason Maher | Male | Buena Vista, CO | 1 |
| Morgan Mahn | Male | Kansas City, MO | 1 |
| Maria Main | Female | Fort Collins, CO | 1 |
| Sara Malang | Female | Superior, CO | 1 |
| Enrique Maldonado | Male | Northglenn, CO | 4 |
| Tricia Maldonado | Female | Littleton, CO | 1 |
| Chacey Malhouitre | Female | Lexington, KY | 1 |
| Sara Mallie | Female | Golden, CO | 1 |
| Shelby Malloy | Female | Westminster, CO | 2 |
| Jenn Malmberg | Female | Fort Collins, CO | 2 |
| Sam Malmberg | Male | Fort Collins, CO | 2 |
| Paul Maloney | Male | Fort Collins, CO | 2 |
| Andrew Manaster | Male | Longmont, CO | 1 |
| Reid Maniscalco | Male | Boulder, CO | 1 |
| Evan Mann | Male | Loveland, CO | 1 |
| Jacquie Mannhard | Female | Boulder, CO | 1 |
| Heather Manning | Female | Fort Collins, CO | 1 |
| Diego Manriquez | Male | Fort Collins, CO | 1 |
| Lisa Mansfield | Female | Niwot, CO | 1 |
| Stephanie Mantie | Female | Fort Collins, CO | 2 |
| Joseph Marchell | Male | Fort Collins, CO | 1 |
| Desiree Marek | Female | Denver, CO | 2 |
| Neyah Margolis | Male | Boulder, CO | 1 |
| Talon Marquard | Male | Littleton, CO | 1 |
| Bruno Marquie | Male | Fort Collins, CO | 1 |
| Adam Marsh | Male | Cheyenne, WY | 1 |
| Christa Marsh | Female | Longmont, CO | 1 |
| Jonathan Marshall | Male | Denver, CO | 1 |
| Laura Marshall | Female | Fort Collins, CO | 1 |
| Ryan Marsters | Male | Golden, CO | 1 |
| Jacob Marthiljohni | Male | Loveland, CO | 1 |
| Craig Martin | Male | Fort Collins, CO | 1 |
| Nicholas Martin | Male | Littleton, CO | 1 |
| Nick Martin | Male | Seattle, WA | 3 |
| Richard Martin | Male | Milwaukee, WI | 1 |
| Celine Martinet-Andrieux | Female | Austin, TX | 1 |
| Michael Martinez | Male | Colorado Springs, CO | 1 |
| Andy Martinolich | Male | Fort Collins, CO | 1 |
| Jennifer Masamitsu | Female | Denver, CO | 1 |
| Chad Masching | Male | Golden, CO | 1 |
| Laura Mason | Female | Columbus, CO | 1 |