Searched 19 events from September 17, 2005 to September 16, 2023
| Name | Gender | From | Finish Count |
|---|---|---|---|
| Steven Acarregui | Male | 2 | |
| Steve Ackman | Male | 1 | |
| Spirit ACladach | Female | 1 | |
| Alina Acosta | Female | Denver, CO | 1 |
| Kateri Ahrendt | Female | Boulder, CO | 6 |
| Noor Alam | Female | Broomfield, CO | 2 |
| Tina Albert | Female | 1 | |
| Tobias Albrigtsen | Male | Fairbanks, AK | 3 |
| John Alcorn | Male | Boulder, CO | 4 |
| David Alexander | Male | Boulder, CO | 3 |
| Mike Alkaitis | Male | 2 | |
| Emanuel Alongi | Male | 2 | |
| Tess Amer | Female | Boulder, CO | 1 |
| Andy Ames | Male | Boulder, CO | 19 |
| Cass Amsden | Female | Overland Park, KS | 1 |
| Bob Anderson | Male | 1 | |
| Chris Anderson | Male | 1 | |
| Joel Anderson | Male | Boulder, CO | 1 |
| Kristi Anderson | Female | Longmont, CO | 5 |
| John Andreula | Male | 2 | |
| Steve Annecone | Male | Boulder, CO | 7 |
| Jason Antin | Male | Golden, CO | 2 |
| Jenny Antin | Female | Golden,, CO | 3 |
| Deanna Ardrey | Female | Boulder, CO | 3 |
| Marc Arnold | Male | Rincon, GA | 2 |
| Kara Ashcraft | Female | Longmont, CO | 1 |
| Divya Ashok | Female | 1 | |
| Edward Atkinson | Male | 1 | |
| Sheri Atkinson | Female | Broomfield, CO | 1 |
| Scott Bachman | Male | Boulder, CO | 3 |
| Jessica Baker | Female | 1 | |
| Levi Baker | Male | Boulder, CO | 1 |
| Luke Baker | Male | Boulder, CO | 1 |
| Neala Ball | Female | 1 | |
| Ashley Ballantyne | Male | 1 | |
| Phil Bandoch | Male | 1 | |
| Russell Bangert | Male | 1 | |
| Luis Barandiaran | Male | 2 | |
| Nathan Barber | Male | 1 | |
| Luke Barbier | Male | Denver, CO | 1 |
| George Barnes | Male | Westminster, CO | 6 |
| Scott Barnes | Male | 1 | |
| Matthew Baron | Male | 1 | |
| Caitlin Barr | Female | Denver, CO | 1 |
| Drew Barton | Male | 1 | |
| Rob Baumgartner | Male | 1 | |
| Ryan Beard | Male | Denver, CO | 1 |
| Abby Beattie | Female | 1 | |
| Angie Beeler | Female | 1 | |
| Ben Beezley | Male | Boulder, CO | 2 |