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JD
John Duffy
MaleMaryland2017–2025
19
Total Finishes
13
Distinct Races
1
States (2%)
1:53:14
PR (8:39/mi)
2:10:19
Average
+0:44:43
Slower (first to last)
Medal House
2024
Frederick Running Festival
2:01:50
#910 overall0
2024
Frederick Running Festival
2:01:51
#910 overall#635 gender
2023
Lock 2 Lock Marathon/Half Marathon/10k
2:13:32
#25 overall0
2023
Lock 2 Lock Marathon/Half Marathon/10k
2:13:32
#25 overall#14 gender
2023
Frederick Running Festival
2:15:58
#1512 overall0
2023
Frederick Running Festival
2:15:59
#1320 overall#796 gender
2019
Hershey Half Marathon
2:08:26
#1291 overall#723 gender
2018
Frederick Running Festival
1:53:14
#650 overall0
2018
Frederick Running Festival
1:53:14
#643 overall#465 gender
2018
Star Wars Half Marathon - The Dark Side
1:56:22
#740 overall#611 gender
2018
Baltimore Running Festival
1:59:25
#1534 overall#963 gender
2017
Baltimore Running Festival
1:59:06
#1348 overall#868 gender
Performance Timeline
Complete Race Log
| Year | Race | State | Time | Place |
|---|---|---|---|---|
| 2025 | Frederick Running FestivalFrederick | MD | 2:06:43 | #1028 |
| 2025 | Frederick Running FestivalFrederick | MD | 2:06:44 | #1028 |
| 2025 | Lock 2 Lock Marathon/Half Marathon/10kWilliamsport | MD | 2:43:49 | #103 |
| 2025 | Lock 2 Lock Marathon/Half Marathon/10kWilliamsport | MD | 2:43:49 | #103 |
| 2024 | Frederick Running FestivalFrederick | MD | 2:01:50 | #910 |
| 2024 | Frederick Running FestivalFrederick | MD | 2:01:51 | #910 |
| 2024 | Lock 2 Lock Marathon/Half Marathon/10kWilliamsport | MD | 2:03:54 | #44 |
| 2024 | Lock 2 Lock Marathon/Half Marathon/10kWilliamsport | MD | 2:03:54 | #44 |
| 2024 | Frederick Running FestivalFrederick | MD | 2:34:43 | #104 |
| 2023 | Lock 2 Lock Marathon/Half Marathon/10kWilliamsport | MD | 2:13:32 | #25 |
| 2023 | Lock 2 Lock Marathon/Half Marathon/10kWilliamsport | MD | 2:13:32 | #25 |
| 2023 | Frederick Running FestivalFrederick | MD | 2:15:58 | #1512 |
| 2023 | Frederick Running FestivalFrederick | MD | 2:15:59 | #1320 |
| 2019 | Hershey Half MarathonHershey | PA | 2:08:26 | #1291 |
| 2018 | Frederick Running FestivalFrederick | MD | 1:53:14 | #650 |
| 2018 | Frederick Running FestivalFrederick | MD | 1:53:14 | #643 |
| 2018 | Star Wars Half Marathon - The Dark SideLake Buena Vista | FL | 1:56:22 | #740 |
| 2018 | Baltimore Running FestivalBaltimore | MD | 1:59:25 | #1534 |
| 2017 | Baltimore Running FestivalBaltimore | MD | 1:59:06 | #1348 |
States Raced
1 race 2 races 3-4 races 5+ races
State Breakdown
MDMaryland
17 races50-State Challenge
1/ 51 states + DC
50 states to go