Searched 21 events from September 17, 2005 to September 20, 2025
| Name | Gender | From | Finish Count |
|---|---|---|---|
| Yixin Li | Male | 2 | |
| Merilee Linfield | Female | 1 | |
| Eric LiPuma | Male | Boulder, CO | 1 |
| Delcia Litt | Female | 1 | |
| Miles Long | Male | 2 | |
| Alex Loomis | Male | Honolulu, HI | 1 |
| Katie Loomis | Female | Westminster, CO | 1 |
| Lou Lorber | Male | 2 | |
| Levi Lorenzo | Male | Boulder, CO | 1 |
| Walton Lott | Male | Boulder, CO | 1 |
| Paul Lottridge | Male | Golden, CO | 1 |
| Johnny Love | Male | 1 | |
| Aaron Lozier | Male | Boulder, CO | 3 |
| Aaron Lucas | Male | Boulder, CO | 2 |
| Katie Ludwin | Female | 1 | |
| Tom Lukas | Male | 1 | |
| Eric Lund | Male | 1 | |
| Greg Lund | Male | Boulder, CO | 3 |
| Kyle Lund | Male | Boulder, CO | 1 |
| Tom Lund | Male | Boulder, CO | 8 |
| Roy Lunde | Male | Superior, CO | 4 |
| Forrest Lundstrom | Male | Golden, CO | 2 |
| Joey Luther | Male | Boulder, CO | 10 |
| Daniel Lyness | Male | Boulder, CO | 3 |
| Zach Maas | Male | Boulder, CO | 2 |
| Richard Mable | Male | Boulder, CO | 1 |
| Brooks Macdonald | Male | Boulder, CO | 1 |
| Dave Mackey | Male | Boulder, CO | 8 |
| Ellen Mackey | Female | 1 | |
| Travis Macy | Male | Evergreen, CO | 1 |
| Sherry Madison | Female | 1 | |
| Lawrence Maggitti | Male | Boulder, CO | 1 |
| Sophia Mahoney | Female | Boulder, CO | 3 |
| Bob Main | Male | 2 | |
| Amanda Makowiecki | Female | Boulder, CO | 1 |
| Ryan Malarky | Male | Fort Collins, CO | 7 |
| Avivah Malin | Female | Boulder, CO | 1 |
| Andy Malinky | Male | Broomfield, CO | 1 |
| Nicholas Malone | Male | Boulder, CO | 1 |
| Amelia Mandell | Female | Eldorado Springs, CO | 1 |
| Kishen Mangat | Male | Boulder, CO | 2 |
| Jacquie Mannhard | Female | Boulder, CO | 1 |
| Stephen Mannhard | Male | 1 | |
| Lisa Mansfield | Female | Niwot, CO | 1 |
| Amy Manson | Female | Superior, CO | 1 |
| Max Manson | Male | Superior, CO | 3 |
| Rachel Marbaker | Female | Boulder, CO | 2 |
| Nathan Marincic | Male | Boulder, CO | 1 |
| Heidi Marks | Female | 1 | |
| Arlo Marquez-Grap | Male | Boulder, CO | 1 |