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JD
Jeff Duyn
MaleMaryland2013–2025
10
Total Finishes
3
Distinct Races
1
States (2%)
1:22:19
PR (6:17/mi)
1:25:04
Average
+0:02:45
Slower (first to last)
Medal House
2025
Parks Half Marathon
1:27:44
#46 overall#40 gender
2024
Parks Half Marathon
1:25:03
#42 overall#38 gender
2023
Parks Half Marathon
1:32:15
#54 overall#47 gender
2021
MCRRC Riley's Rumble Half Marathon
1:22:19
#8 overall#8 gender
2018
MCRRC Riley's Rumble Half Marathon
1:24:17
#4 overall#4 gender
2017
MCRRC Riley's Rumble Half Marathon
1:23:10
#12 overall#12 gender
2016
Parks Half Marathon
1:23:29
#20 overall#20 gender
2016
MCRRC Riley's Rumble Half Marathon
1:24:37
#7 overall#7 gender
2015
B&A Trail Marathon and Half Marathon
1:22:43
#6 overall#6 gender
2013
Parks Half Marathon
1:24:59
#45 overall#42 gender
Performance Timeline
Complete Race Log
| Year | Race | State | Time | Place |
|---|---|---|---|---|
| 2025 | Parks Half MarathonRockville | MD | 1:27:44 | #46 |
| 2024 | Parks Half MarathonRockville | MD | 1:25:03 | #42 |
| 2023 | Parks Half MarathonRockville | MD | 1:32:15 | #54 |
| 2021 | MCRRC Riley's Rumble Half MarathonBoyds | MD | 1:22:19 | #8 |
| 2018 | MCRRC Riley's Rumble Half MarathonBoyds | MD | 1:24:17 | #4 |
| 2017 | MCRRC Riley's Rumble Half MarathonBoyds | MD | 1:23:10 | #12 |
| 2016 | Parks Half MarathonRockville | MD | 1:23:29 | #20 |
| 2016 | MCRRC Riley's Rumble Half MarathonBoyds | MD | 1:24:37 | #7 |
| 2015 | B&A Trail Marathon and Half MarathonSeverna Park | MD | 1:22:43 | #6 |
| 2013 | Parks Half MarathonRockville | MD | 1:24:59 | #45 |
States Raced
1 race 2 races 3-4 races 5+ races
State Breakdown
MDMaryland
10 races50-State Challenge
1/ 51 states + DC
50 states to go