Federation · USA
United States national best marks
Best marks by United States athletes in each event, compiled from the all-time lists we import. Derived national bests — not official national records (see note below).
18
Stored marks
12
Distinct marks shown
Men's 10 km
Derived 14 Sep 2026
| # | Athlete | Mark | Date | Venue | Age |
|---|---|---|---|---|---|
| 1 | Mark Nenow | 27:22 | 1 Apr 1984 | — | — |
| 2 | Conner Mantz | 27:26 | 2 Aug 2025 | — | — |
| 3 | Abbabiya Simbassa | 27:32 | 3 May 2025 | — | — |
| 4 | Conner Mantz | 27:36 | 2 Aug 2025 | — | — |
| 5 | Samuel Kibet | 27:37 | 2 Jun 2024 | — | — |
| 6 | Zouhair Talbi | 27:38 | 28 Mar 2026 | — | — |
| 7 | Morgan Beadlescomb | 27:45 | 31 May 2026 | — | — |
| 8 | Mark Nenow | 27:48 | 2 Mar 1985 | — | — |
| 8= | Khalid Khannouchi | 27:48 | 7 Aug 1999 | — | — |
| 8= | Bernard Lagat | 27:48 | 10 May 2015 | — | 40 |
| 8= | Conner Mantz | 27:48 | 16 Mar 2025 | — | — |
| 8= | Hillary Bor | 27:48 | 16 Mar 2025 | — | — |
| 13 | Dirk Lakeman | 27:49 | 19 Oct 1986 | — | — |
| 13= | Bruce Bickford | 27:49 | 19 Oct 1986 | — | — |
| 15 | Ben True | 27:51 | 3 Aug 2014 | — | — |
| 16 | Mark Nenow | 27:55 | 7 Oct 1989 | — | — |
| 17 | John Gregorek | 27:56 | 28 Feb 1987 | — | — |
| 17= | Zouhair Talbi | 27:56 | 15 Mar 2026 | — | — |
Every mark in scope within the compiled depth. Equal marks share a rank ("1=" style). An athlete with marks for two nations appears under each nation represented at the time (e.g. Obikwelu under Nigeria and Portugal).
About this derivation
These lists are derived from the marks in our database — including the complete legal all-time lists imported from alltime-athletics.com — grouped by the nation the athlete was representing at each mark. They are not official national records: federations ratify national records under their own eligibility rules, and some marks here may not qualify.