Searched 19 events from September 17, 2005 to September 16, 2023
| Name | Gender | From | Finish Count |
|---|---|---|---|
| Kate Beezley | Female | Boulder, CO | 2 |
| Patrick Begley | Male | Boulder, CO | 1 |
| Bryan Beiner | Male | 1 | |
| Mike Bell | Male | Lakewood, CO | 2 |
| Darren Bennett | Male | Boulder, CO | 1 |
| Megan Berg | Female | 1 | |
| Kelly Berglund | Female | 2 | |
| JulieAnn Bergman | Female | 6 | |
| Marc Bergman | Male | 5 | |
| Rey Bernard | Female | 1 | |
| Bonnie Beverly | Female | 1 | |
| Chuk Bible | Male | Lakewood, CO | 2 |
| Kreighton Bieger | Male | 2 | |
| Kate Bierbaum | Female | 2 | |
| Sabine Bildstein | Female | Boulder, CO | 4 |
| Christian Billington | Male | 1 | |
| Katie Blackett | Female | 1 | |
| Sam Blackshear | Male | San Francisco, CA | 1 |
| David Blankinship | Male | Louisville, CO | 1 |
| Jess Bloise | Female | Boulder, CO | 1 |
| Jackie Blumberg | Female | 4 | |
| Mark Bockmann | Male | 1 | |
| Brooke Boice | Male | Boulder, CO | 1 |
| Juli Boice | Female | 1 | |
| Kevin Bold | Male | Boulder, CO | 1 |
| Russ Bollig | Male | 5 | |
| Alice Bonan | Female | Superior, CO | 1 |
| David Bonan | Male | Superior, CO | 2 |
| Pamela Bond | Female | Boulder, CO | 1 |
| Keith Bough | Male | Denver, CO | 2 |
| Paul Bousquet | Male | 1 | |
| Terry Boyd | Male | 1 | |
| Nathan Boyer-Rechlin | Male | Boulder, CO | 1 |
| Benji Boyle | Female | Boulder, CO | 1 |
| Sarah Brandt | Female | 1 | |
| Bill Briggs | Male | Colorado | 3 |
| Jackson Brill | Male | Boulder, CO | 5 |
| Adam Brink | Male | 1 | |
| Lize Brittin | Female | 1 | |
| Cameron Brooks | Male | 1 | |
| Tony Bubb | Male | Erie, CO | 12 |
| Sonia Buckley | Female | Boulder, CO | 2 |
| Max Burgess | Male | Westminster, CO | 1 |
| Buzz Burrell | Male | Boulder, CO | 3 |
| Galen Burrell | Male | Louisville, CO | 5 |
| Jeffrey Butt | Male | Superior, CO | 1 |
| Samantha Calderon | Female | Boulder, CO | 1 |
| Kendrick Callaway | Male | Boulder, CO | 1 |
| Tara Calloway | Female | 1 | |
| Brendan Carley | Male | Costa Mesa, CA | 1 |