All-Colorado Marathon and Half Marathon Records
To the best of our knowledge, these are the fastest times ever run at a marathon or half marathon in the state of Colorado, on a USATF certified course. Some of the certified courses in Colorado are downhill courses which are not eligible for American Record purposes per USATF. However, we feel that because of the altitude factor, we will consider results run on those courses as eligible for this list. Please contact us if you feel you have run faster.
Credit goes to Jon Sinclair who passed these records on to us to maintain starting in 2010.
Looking for records for other distances? Check out Tim Rutherford’s page – Colorado Track Stats.
These records are copyrighted by Colorado Runner LLC. Any reproduction without the express written consent of Colorado Runner LLC is prohibited.
Updated 10/15/2025
Marathon Records
Male
| Age Group | Athlete | Race | Year | Time |
|---|---|---|---|---|
| 19 and Under | Awet Beraki | ADT | 2016 | 2:38:18 |
| 20-24 | Creighton King | Rawhide | 1983 | 2:22:12 |
| 25-29 | Norberto Segura | Rawhide | 1984 | 2:18:06 |
| 30-34 | Chris Siemers | Rock ‘n’ Roll | 2011 | 2:18:48 |
| 35-39 | Milton Rotich | Boulderthon | 2025 | 2:21:00 |
| 40-44 | Anthony Bruns | Colorado | 2024 | 2:28:21 |
| 45-49 | Ardel Boes | Rawhide | 1982 | 2:29:30 |
| 50-54 | Tom Bailey | Denver Post | 1981 | 2:38:57 |
| 55-59 | Tom Bailey | Rawhide | 1984 | 2:42:20 |
| 60-64 | Paul Hughes | Long View | 2020 | 2:55:44 |
| 65-69 | Paul Hughes | Colorado | 2023 | 2:58:43 |
| 70 and over | Steve Parker | REVEL Rockies | 2022 | 3:41:02 |
Female
| Age Group | Athlete | Race | Year | Time |
|---|---|---|---|---|
| 19 and Under | Christina Winchell | Long View | 2025 | 2:50:56 |
| 20-24 | Kate Bricker | Rawhide | 1983 | 2:49:36 |
| 25-29 | Masako Chiba | Boulder Backroads | 2004 | 2:41:05 |
| 30-34 | Mizuho Nasukawa | Rock ‘n’ Roll | 2012 | 2:37:05 |
| 35-39 | Nuta Olaru | Denver | 2008 | 2:42:18 |
| 40-44 | Martha Tenorio | Denver | 2007 | 2:46:41 |
| 45-49 | Mercedes Gil | Colorado | 2008 | 3:00:41 |
| 50-54 | Rachel Fox | Colorado | 2024 | 3:01:15 |
| 55-59 | Julie Draguns | REVEL Rockies | 2023 | 3:16:28 |
| 60-64 | Coco Dughi | Colorado | 2025 | 3:16:36 |
| 65-69 | Margareta Nuytinck | REVEL Rockies | 2018 | 3:41:46 |
| 70 and over | Myra Rhodes | Colorado | 2006 | 4:09:12 |
Half Marathon Records
Male
| Age Group | Athlete | Race | Year | Time |
|---|---|---|---|---|
| 19 and Under | Awet Beraki | ADT | 2017 | 1:10:09 |
| 20-24 | Emad Bashir-Mohammed | Colfax | 2025 | 1:03:06 |
| 25-29 | Mario Macias | Georgetown to Idaho Springs | 2011 | 1:02:50 |
| 30-34 | Lawrence Kipkoech | Colfax | 2025 | 1:03:18 |
| 35-39 | Tyler McCandless | Colfax | 2025 | 1:05:18 |
| 40-44 | Esteban Trujillo | Fall Equinox | 2025 | 1:06:31 |
| 45-49 | Anthony Bruns | Fall Equinox | 2025 | 1:09:37 |
| 50-54 | Bob Weiner | Georgetown to Idaho Springs | 2015 | 1:12:19 |
| 55-59 | Frank Zoldak | Fall Equinox | 2024 | 1:17:46 |
| 60-64 | Roger Sayre | Fall Equinox | 2018 | 1:19:47 |
| 65-69 | Paul Hughes | Fall Equinox | 2022 | 1:20:25 |
| 70 and over | Jose Cardenas | Boulder Backroads | 2004 | 1:33:48 |
Female
| Age Group | Athlete | Race | Year | Time |
|---|---|---|---|---|
| 19 and Under | Azusa Sumi | Boulder Backroads | 2015 | 1:15:09 |
| 20-24 | Catherine Mwanzau | Boulderthon | 2023 | 1:14:22 |
| 25-29 | Maureen Custy | Rawhide | 1984 | 1:14:08 |
| 30-34 | Biruktayit Degefa | Colfax | 2021 | 1:11:49 |
| 35-39 | Sara Vaughn | Fall Equinox | 2023 | 1:10:54 |
| 40-44 | Joanna Zeiger | REVEL Rockies | 2014 | 1:14:03 |
| 45-49 | Priscah Cherono | Boulderthon | 2025 | 1:16:48 |
| 50-54 | Colleen De Reuck | Platte River | 2015 | 1:21:17 |
| 55-59 | Susan Loken | REVEL Rockies | 2022 | 1:26:46 |
| 60-64 | Kristine Clark | Fall Equinox | 2025 | 1:30:45 |
| 65-69 | Abigail Wade | Slacker | 2022 | 1:42:10 |
| 70 and over | Debbie Clark | Fall Equinox | 2022 | 1:45:13 |
These records are copyrighted by Colorado Runner LLC. Any reproduction without the express written consent of Colorado Runner LLC is prohibited.