Searched 13 events from July 25, 2015 to July 29, 2023
| Name | Gender | From | Finish Count |
|---|---|---|---|
| Jonathan Barker | Male | Boulder, CO | 1 |
| Paul Barnes | Male | San Francisco, CA | 1 |
| Grant Barnette | Male | Alta, UT | 1 |
| Nathaniel Barr | Male | Washington, DC | 1 |
| Tim Barr | Male | Arvada, CO | 2 |
| Andrew Barrett | Male | Tampa, FL | 3 |
| Fanny Barrette | Female | Calgary, AB | 1 |
| Ben Barthel | Male | Broomfield, CO | 2 |
| Mickey Bartkowiak | Male | Fort Collins, CO | 1 |
| Ethan Bartle | Male | Denver, CO | 1 |
| Hannah Barton | Female | Boulder, CO | 1 |
| Maria Barton | Female | Apple Valley, MN | 2 |
| David Barylak | Male | Fort Collins, CO | 1 |
| Nicholas Bassett | Male | Cheyenne, WY | 1 |
| Ben Bates | Male | Lakewood, CO | 2 |
| Mary Baughman | Female | Boulder, CO | 1 |
| James Baumhover | Male | Cheyenne, WY | 1 |
| Garrett Bazzell | Male | Osceola, IA | 1 |
| Sam Beal | Male | Estes Park, CO | 3 |
| Douglas Beattie | Nonbinary | Darien, IL | 1 |
| Patricia Beaty | Female | Park City, UT | 1 |
| Heidi Beauchamp | Female | Lakewood, CO | 2 |
| Jacob Bebo | Male | Berthoud, CO | 1 |
| Sarah Beck | Female | Fort Collins, CO | 1 |
| Mikal Beckman | Female | Steamboat Springs, CO | 1 |
| Tori Beckwith | Female | Fort Collins, CO | 3 |
| Annie Behrend | Female | Rochester, MN | 1 |
| Lee Anne Belcourt | Female | Squamish, BC | 1 |
| John Bello | Male | Tempe, AZ | 1 |
| Mike Belloni | Male | Indianapolis, IN | 1 |
| Jimmy Beltz | Male | Wayzata, MN | 1 |
| Miles Benevich | Male | San Antonio, TX | 1 |
| Mohamed Faouzi Ben Majed | Male | La Marsa, Tunisia | 1 |
| Drew Bennion | Male | Gilbert, AZ | 1 |
| Jenna Bensko | Female | Fort Collins, CO | 2 |
| Michael Bepristis | Male | Arvada, CO | 1 |
| Jamie Berard | Male | San Juan Capistrano, CA | 1 |
| Matthew Berdine | Male | Centennial, CO | 1 |
| Lindsay Bergman | Female | Vail, CO | 1 |
| Diane Bergstedt | Female | Fort Collins, CO | 2 |
| Colin Berry | Male | Kangaroo Valley | 1 |
| Larkin Berry | Male | Boulder, CO | 1 |
| Matthew Berry | Male | Louisville, CO | 1 |
| Tarne Berry | Female | Kangaroo Valley | 1 |
| Kim Bessler | Female | Lakewood, CO | 1 |
| Guillermo Bethencourt | Male | Spain | 1 |
| Donald Beuke | Male | Broomfield, CO | 1 |
| Peter Bianco | Male | Leawood, KS | 1 |
| Debbie Bibb | Female | Florissant, CO | 1 |
| Ben Bibee | Male | Estes Park, CO | 1 |