Searched 7 events from October 21, 2017 to October 21, 2023
| Name | Gender | From | Finish Count |
|---|---|---|---|
| Kay Borleis | Female | Boulder, CO | 1 |
| Susan Bott | Female | Windsor, CO | 3 |
| Colette Boulet | Female | Flagstaff, AZ | 1 |
| Chad Bowman | Male | Fort Collins, CO | 1 |
| David Boyd | Male | Fort Collins, CO | 1 |
| Samuel Boyer Groff | Male | Berthoud, CO | 1 |
| Ron Boyle | Male | Greeley, CO | 2 |
| Matty Boyles | Male | Loveland, CO | 2 |
| Ryan Brackley | Male | Boulder, CO | 1 |
| Addie Bracy | Female | Longmont, CO | 2 |
| Jeremy Bradford | Male | Denver, CO | 1 |
| Sean Bradley | Male | Fort Collins, CO | 1 |
| William Bradley | Male | Loveland, CO | 2 |
| Wes Bradshaw | Male | Fort Collins, CO | 2 |
| Chris Branchflower | Male | Fort Collins, CO | 1 |
| Karen Brandenburg | Female | Denver, CO | 1 |
| Kimberly Brandon | Female | Colorado Springs, CO | 1 |
| Justin Brant | Male | Boulder, CO | 1 |
| Alex Breeden | Male | Fort Collins, CO | 1 |
| Jackson Brill | Male | Boulder, CO | 1 |
| Blaise Brochard | Male | New York, NY | 3 |
| Elise Broderick | Female | Durango, CO | 1 |
| Brian Brooks | Male | Golden, CO | 1 |
| Mindy Brooksby | Female | Vernal, UT | 1 |
| Robert Broomfield | Male | Fort Collins, CO | 2 |
| Timothy Brosious | Male | Broomfield, CO | 1 |
| Michael Brothers | Male | Fort Collins, CO | 1 |
| Zach Broughton | Male | Greeley, CO | 1 |
| Brenda Brown | Female | Windsor, CO | 1 |
| Hattie Brown | Female | Denver, CO | 1 |
| Jeremy Brown | Male | Berthoud, CO | 1 |
| Kevin Brown | Male | Berthoud, CO | 1 |
| Matt Brown | Male | Denver, CO | 1 |
| Haley Browning | Female | Lakewood, CO | 1 |
| Jeff Buchman | Male | Denver, CO | 1 |
| Kristen Buckland | Female | Colorado Springs, CO | 1 |
| Shelby Buckley | Female | Boulder, CO | 1 |
| Becky Bui | Female | Lakewood, CO | 1 |
| Andoni Bujan | Male | Denver, CO | 1 |
| Christopher Bull | Male | Loveland, CO | 1 |
| Kelli Bullock | Female | Raleigh, NC | 1 |
| Benjamin Bumgarner | Male | Zionsville, IN | 1 |
| Jon Bumgarner | Male | Zionsville, IN | 1 |
| Andrew Burbidge | Male | Denver, CO | 1 |
| Matt Burch | Male | Fort Collins, CO | 1 |
| Ryan Burch | Male | Loveland, CO | 1 |
| Brad Burger | Male | Boulder, CO | 1 |
| Erin Burr | Female | Fort Collins, CO | 1 |
| Emmylou Burrows | Female | Fort Collins, CO | 1 |
| Michael Burton | Male | New Milford, CT | 1 |