Searched 13 events from July 25, 2015 to July 29, 2023
| Name | Gender | From | Finish Count |
|---|---|---|---|
| Jon Aardal | Male | Fort Collins, CO | 1 |
| Brent Abbott | Male | Boulder, CO | 3 |
| Jerry Abbott | Male | New Market, AL | 1 |
| Chris Abell | Male | Owensboro, KY | 1 |
| Valerie Abradi | Female | Lisbon, ME | 2 |
| Mike Acer | Male | Yardley, PA | 1 |
| Kurt Achtenhagen | Male | Boulder, CO | 1 |
| Nicholas Ackermann | Male | Austin, TX | 1 |
| Robin Ackermann | Female | Silverthorne, CO | 1 |
| Wendy Ackermann | Female | Homewood, CA | 1 |
| Blaine Adams | Male | San Antonio, TX | 1 |
| Cherry Rose Adams | Female | Lakewood, CO | 1 |
| Harley Adams | Male | Marietta, GA | 1 |
| Jeffrey Adams | Male | Buffalo, NY | 1 |
| Michael Adams | Male | Lakewood, CO | 2 |
| Sarah Adams | Female | Highlands Ranch, CO | 1 |
| Lee Addams | Male | Omaha, NE | 1 |
| Nick Affleck | Male | Chico, CA | 1 |
| Bob Africa | Male | Boulder, CO | 2 |
| Hannah Agosta | Female | Denver, CO | 1 |
| Andreas Aguirre | Male | San Diego, CA | 1 |
| Stephan Aguirrre | Male | Foxfield, CO | 1 |
| Dan Ainslie | Male | Arvada, CO | 2 |
| Alex Aistrope | Male | Severance, CO | 1 |
| Ramon Ajero | Male | Fort Collins, CO | 1 |
| Cory Akin | Male | Salt Lake City, UT | 1 |
| Jordan Akiyoshi | Male | Los Gatos, CA | 1 |
| Nicholas Akley | Male | Elizabeth, CO | 1 |
| Eric Albers | Male | Salt Lake City, UT | 1 |
| Jeff Albert | Male | Windsor, CO | 4 |
| Jesse Alexander | Male | Camp Verde, AZ | 1 |
| George Alexion | Male | Waterboro, ME | 1 |
| Costa Alimonos | Male | Windsor, CO | 1 |
| Darian Allberry | Male | Denver, CO | 1 |
| Greg Allen | Male | Bloomington, MN | 1 |
| James Allen | Male | Denver, CO | 1 |
| Jeff Allen | Male | Hemet, CA | 1 |
| Phil Allen | Male | Highlands Ranch, CO | 1 |
| Rachel Allen | Female | Montrose, CO | 1 |
| Steve Allen | Male | Denver, CO | 1 |
| Jordan Allison | Male | Loveland, CO | 4 |
| Martin Almazan | Male | Denver, CO | 4 |
| Alisha Alness | Female | Mound, MN | 1 |
| Christie Amero | Female | Boulder, CO | 1 |
| Sara Amish | Female | Lakewood, CO | 1 |
| Chelsea Ammons | Female | Greenwood Village, CO | 1 |
| Evan Amo | Male | Denver, CO | 1 |
| Lisa Anderberg | Female | Washington, DC | 1 |
| Clint Anders | Male | Fort Collins, CO | 3 |
| Sophie Anders | Female | Fort Collins, CO | 1 |