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BOSTON MARATHON 2025

Jae Hoon Koh

Bib: 5067•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 16%
Gender (Male)
#0 / 16105
Top 26%
Masters (Masters Men)
#0 / 10463
Top 12%
Division (M55-59)
#0 / 1648
Top 3%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
6:42/mi
20:50
↑ 97↓ 3451.5%
10K· 6.21 mi
6:45/mi
41:47
↑ 79↓ 1380.4%
15K· 9.32 mi
7:12/mi
1:04:10
↑ 67↓ 78
20K· 12.43 mi
6:43/mi
1:25:03
↑ 106↓ 860.1%
Half· 13.11 mi
6:34/mi
1:29:32
↑ 19↓ 370.5%
25K· 15.53 mi
6:44/mi
1:45:52
↑ 66↓ 880.2%
30K· 18.64 mi
6:53/mi
2:07:14
↑ 181↓ 1480.2%
20M
6:59/mi
2:16:43
↑ 64↓ 500.2%
21M
7:20/mi
2:24:03
↑ 106↓ 241.6%
35K· 21.75 mi
6:38/mi
2:29:01
↑ 17↓ 861.7%
23M
6:58/mi
2:37:44
↑ 23↓ 630.6%
24M
6:50/mi
2:44:34
↓ 821.3%
40K· 24.85 mi
6:55/mi
2:50:29
↓ 200.3%
25.2M
7:32/mi
2:53:05
↑ 13↓ 160.2%
Finish· 26.22 mi
6:34/mi
2:59:46
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:29:32
Pace6:50 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:30:14
Pace6:53 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:0920:506:4220:50
6:42
-
10K
6.21 mi11:08:0641:476:4320:57
6:45
+0:03
15K
9.32 mi11:30:291:04:106:5322:23
7:12
+0:27
20K
12.43 mi11:51:221:25:036:5120:53
6:43
-0:29
Half
13.11 mi11:55:511:29:326:504:29
6:34
-0:09
25K
15.53 mi12:12:111:45:526:4916:20
6:44
+0:10
30K
18.64 mi12:33:332:07:146:5021:22
6:53
+0:09
20M
20.00 mi12:43:022:16:436:509:29
6:59
+0:06
21M
21.00 mi12:50:222:24:036:527:20
7:20
+0:21
35K
21.75 mi12:55:202:29:016:514:58
6:38
-0:42
23M
23.00 mi13:04:032:37:446:518:43
6:58
+0:20
24M
24.00 mi13:10:532:44:346:516:50
6:50
-0:08
40K
24.85 mi13:16:482:50:296:525:55
6:55
+0:05
25.2M
25.20 mi13:19:242:53:056:522:36
7:32
+0:37
Finish
26.22 mi13:26:052:59:466:526:41
6:34
-0:58

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:34 /mi

Average Pace

6:52 /mi

Slowest Pace

7:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:49:50

94% of race

Time at Steady Pace

9:56

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:51 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:47:0920:506:4220:50
6:42
#5496
10K
6.21 mi11:08:0641:476:4320:57
6:45
#5617
15K
9.32 mi11:30:291:04:106:5322:23
7:12
#6945
20K
12.43 mi11:51:221:25:036:5120:53
6:43
#6345
Half
13.11 mi11:55:511:29:326:504:29
6:34
#6218
25K
15.53 mi12:12:111:45:526:4916:20
6:44
#5850
30K
18.64 mi12:33:332:07:146:5021:22
6:53
#5375
20M
20.00 mi12:43:022:16:436:509:29
6:59
#5236
21M
21.00 mi12:50:222:24:036:527:20
7:20
#5093
35K
21.75 mi12:55:202:29:016:514:58
6:38
#4988
23M
23.00 mi13:04:032:37:446:518:43
6:58
#4860
24M
24.00 mi13:10:532:44:346:516:50
6:50
#4774
40K
24.85 mi13:16:482:50:296:525:55
6:55
#4703
25.2M
25.20 mi13:19:242:53:056:522:36
7:32
#4668
Finish
26.22 mi13:26:052:59:466:526:41
6:34
#4617
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi5496509850989150(Top 32%)7630(Top 47%)7630(Top 463%)
10K6.21 mi3.10 mi5617-1215191-935191-935772(Top 20%)5288(Top 33%)5288(Top 321%)
15K9.32 mi3.11 mi6945-13286240-10496240-10499150(Top 32%)7630(Top 47%)7630(Top 463%)
20K12.43 mi3.11 mi6345+6005758+4825758+4824629(Top 16%)4302(Top 27%)4302(Top 261%)
Half13.11 mi0.68 mi6218+1275655+1035655+1034223(Top 15%)3962(Top 25%)3962(Top 240%)
25K15.53 mi2.42 mi5850+3685340+3155340+3154396(Top 15%)4074(Top 25%)4074(Top 247%)
30K18.64 mi3.11 mi5375+4754930+4104930+4103941(Top 14%)3630(Top 23%)3630(Top 220%)
20M20.00 mi1.36 mi5236+1394801+1294801+1294006(Top 14%)3674(Top 23%)3674(Top 223%)
21M21.00 mi1.00 mi5093+1434678+1234678+1233801(Top 13%)3464(Top 22%)3464(Top 210%)
35K21.75 mi0.75 mi4988+1054582+964582+963196(Top 11%)2938(Top 18%)2938(Top 178%)
23M23.00 mi1.25 mi4860+1284466+1164466+1163550(Top 12%)3220(Top 20%)3220(Top 195%)
24M24.00 mi1.00 mi4774+864386+804386+803722(Top 13%)3318(Top 21%)3318(Top 201%)
40K24.85 mi0.85 mi4703+714317+694317+693480(Top 12%)3099(Top 19%)3099(Top 188%)
25.2M25.20 mi0.35 mi4668+354280+374280+373620(Top 13%)3164(Top 20%)3164(Top 192%)
Finish26.22 mi1.02 mi4617+514233+474233+473121(Top 11%)2776(Top 17%)2776(Top 168%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21story building
+97ft-345ft

Overall

9150

Males

7630

M55-59

7630

5K→10K

3.1 - 6.2 mi

Top 20%
×5story building
+79ft-138ft

Overall

5772

Males

5288

M55-59

5288

10K→15K

6.2 - 9.3 mi

Top 32%
×3story building
+67ft-78ft

Overall

9150

Males

7630

M55-59

7630

15K→20K

9.3 - 12.4 mi

Top 16%
×5story building
+106ft-86ft

Overall

4629

Males

4302

M55-59

4302

20K→Half

12.4 - 13.1 mi

Top 15%
×2story building
+19ft-37ft

Overall

4223

Males

3962

M55-59

3962

Half→25K

13.1 - 15.5 mi

Top 15%
×4story building
+66ft-88ft

Overall

4396

Males

4074

M55-59

4074

25K→30K

15.5 - 18.6 mi

Top 14%
×9story building
+181ft-148ft

Overall

3941

Males

3630

M55-59

3630

30K→20M

18.6 - 20.0 mi

Top 14%
×5story building
+64ft-50ft

Overall

4006

Males

3674

M55-59

3674

20M→21M

20.0 - 21.0 mi

Top 13%
×8story building
+106ft-24ft

Overall

3801

Males

3464

M55-59

3464

21M→35K

21.0 - 21.8 mi

Top 11%
×7story building
+17ft-86ft

Overall

3196

Males

2938

M55-59

2938

35K→23M

21.8 - 23.0 mi

Top 12%
×5story building
+23ft-63ft

Overall

3550

Males

3220

M55-59

3220

23M→24M

23.0 - 24.0 mi

Top 13%
×6story building
+12ft-82ft

Overall

3722

Males

3318

M55-59

3318

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3480

Males

3099

M55-59

3099

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3620

Males

3164

M55-59

3164

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2story building
+22ft-21ft

Overall

3121

Males

2776

M55-59

2776

Passing Analysis

Category:
Athletes Passed
2614
Passed By
1735
Net Change
+879
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5496
5K → 10K131252-121#5496#5617
10K → 15K111339-1328#5617#6945
15K → 20K6011+600#6945#6345
20K → Half1281+127#6345#6218
Half → 25K3724+368#6218#5850
25K → 30K4794+475#5850#5375
30K → 20M15516+139#5375#5236
20M → 21M16118+143#5236#5093
21M → 35K1138+105#5093#4988
35K → 23M14820+128#4988#4860
23M → 24M10418+86#4860#4774
24M → 40K9625+71#4774#4703
40K → 25.2M438+35#4703#4668
25.2M → Finish7221+51#4668#4617
TOTALS26141735+879
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing