2026 edition · Half Marathon
Boulderthon Half Marathon 2026: American Results
Boulder, Colorado
Boulderthon Half Marathon: race context
Boulderthon offers a marathon, half marathon and shorter races in Boulder, Colorado. Only half-marathon records appear here, even when a source’s event label also mentions the 10K. Historical spelling variants are grouped into one half-marathon archive.
The recorded American performances
Our half marathon records include 4 men in this edition. Reed Fischer has the fastest recorded time in that group, 1:04:33. Result source for Reed Fischer.
Our half marathon records include 3 women in this edition. Kathryn Fluehr has the fastest recorded time in that group, 1:17:02. Result source for Kathryn Fluehr.
These comparisons describe this site's recorded athletes, not the full race field or official American finishing order. Gun and chip times may appear together; chip times are labeled in the tables.
U.S. men's recorded results
| Subset order | Athlete | Time | Race | Date | Evidence |
|---|---|---|---|---|---|
| 1 | Reed Fischer | 1:04:33 | Boulderton Half Marathon & 10K | Sep 27, 2026 | Result source for Reed Fischer |
| 2 | Aidan Reed | 1:04:48 | Boulderton Half Marathon & 10K | Sep 27, 2026 | Result source for Aidan Reed |
| 3 | Emad Bashir Mohammed | 1:05:43 | Boulderton Half Marathon & 10K | Sep 27, 2026 | Result source for Emad Bashir Mohammed |
| 4 | Garret Lee | 1:10:52 | Boulderton Half Marathon & 10K | Sep 27, 2026 | Result source for Garret Lee |
U.S. women's recorded results
| Subset order | Athlete | Time | Race | Date | Evidence |
|---|---|---|---|---|---|
| 1 | Kathryn Fluehr | 1:17:02 | Boulderton Half Marathon & 10K | Sep 27, 2026 | Result source for Kathryn Fluehr |
| 2 | Neely Spence Gracey | 1:17:24 | Boulderton Half Marathon & 10K | Sep 27, 2026 | Result source for Neely Spence Gracey |
| 3 | Sarah Wills | 1:23:39 | Boulderton Half Marathon & 10K | Sep 27, 2026 | Result source for Sarah Wills |
These are recorded results for the marathoners covered by this site, including historical athletes outside the current rankings. Marathon and half-marathon results are kept separate. This is a view of our recorded athlete histories, not the complete race field. Table order compares the recorded times within each sex; it is not official race placing or an exhaustive American ranking. Gun and chip times may appear together; chip times are labeled. Read the coverage and timing methodology.
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