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BOSTON MARATHON 2025

Chun Sam Jeong

Bib: 16030•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
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
7:46/mi
24:08
↑ 97↓ 3451.5%
10K· 6.21 mi
8:16/mi
49:48
↑ 79↓ 1380.4%
15K· 9.32 mi
8:24/mi
1:15:55
↑ 67↓ 78
20K· 12.43 mi
9:01/mi
1:43:57
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:49:26
↑ 19↓ 370.5%
25K· 15.53 mi
9:01/mi
2:11:17
↑ 66↓ 880.2%
30K· 18.64 mi
9:04/mi
2:39:28
↑ 181↓ 1480.2%
20M
10:34/mi
2:53:49
↑ 64↓ 500.2%
21M
8:47/mi
3:02:36
↑ 106↓ 241.6%
35K· 21.75 mi
7:57/mi
3:08:33
↑ 17↓ 861.7%
23M
8:22/mi
3:19:02
↑ 23↓ 630.6%
24M
8:28/mi
3:27:30
↓ 821.3%
40K· 24.85 mi
8:22/mi
3:34:39
↓ 200.3%
25.2M
8:56/mi
3:37:44
↑ 13↓ 160.2%
Finish· 26.22 mi
7:37/mi
3:45:30
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:26
Pace8:21 /mi
2nd Half
Distance13.11 mi
Time1:56:04
Pace8:51 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:4124:087:4624:08
7:46
-
10K
6.21 mi11:23:2149:488:0125:40
8:16
+0:30
15K
9.32 mi11:49:281:15:558:0926:07
8:24
+0:08
20K
12.43 mi12:17:301:43:578:2228:02
9:01
+0:37
Half
13.11 mi12:22:591:49:268:215:29
8:02
-0:59
25K
15.53 mi12:44:502:11:178:2721:51
9:01
+0:59
30K
18.64 mi13:13:012:39:288:3328:11
9:04
+0:03
20M
20.00 mi13:27:222:53:498:4114:21
10:34
+1:30
21M
21.00 mi13:36:093:02:368:428:47
8:47
-1:47
35K
21.75 mi13:42:063:08:338:405:57
7:57
-0:50
23M
23.00 mi13:52:353:19:028:3910:29
8:22
+0:25
24M
24.00 mi14:01:033:27:308:398:28
8:28
+0:06
40K
24.85 mi14:08:123:34:398:387:09
8:22
-0:06
25.2M
25.20 mi14:11:173:37:448:383:05
8:56
+0:34
Finish
26.22 mi14:19:033:45:308:367:46
7:37
-1:19

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

7:37 /mi

Average Pace

8:36 /mi

Slowest Pace

10:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

43:20

19% of race

Time at Steady Pace

1:17:53

35% of race

Time at Slower Pace

1:44:17

46% of race

Average Pace: 8:36 /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 mi10:57:4124:087:4624:08
7:46
#14508
10K
6.21 mi11:23:2149:488:0125:40
8:16
#16632
15K
9.32 mi11:49:281:15:558:0926:07
8:24
#17394
20K
12.43 mi12:17:301:43:578:2228:02
9:01
#18413
Half
13.11 mi12:22:591:49:268:215:29
8:02
#18288
25K
15.53 mi12:44:502:11:178:2721:51
9:01
#18599
30K
18.64 mi13:13:012:39:288:3328:11
9:04
#18473
20M
20.00 mi13:27:222:53:498:4114:21
10:34
#18980
21M
21.00 mi13:36:093:02:368:428:47
8:47
#18587
35K
21.75 mi13:42:063:08:338:405:57
7:57
#18351
23M
23.00 mi13:52:353:19:028:3910:29
8:22
#17994
24M
24.00 mi14:01:033:27:308:398:28
8:28
#17803
40K
24.85 mi14:08:123:34:398:387:09
8:22
#17617
25.2M
25.20 mi14:11:173:37:448:383:05
8:56
#17516
Finish
26.22 mi14:19:033:45:308:367:46
7:37
#17268
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi14508102461024618734(Top 66%)11936(Top 74%)11936(Top 724%)
10K6.21 mi3.10 mi16632-212411069-82311069-82318287(Top 64%)11754(Top 73%)11754(Top 713%)
15K9.32 mi3.11 mi17394-76211394-32511394-32518734(Top 66%)11936(Top 74%)11936(Top 724%)
20K12.43 mi3.11 mi18413-101911786-39211786-39221084(Top 74%)12919(Top 80%)12919(Top 784%)
Half13.11 mi0.68 mi18288+12511726+6011726+6016169(Top 57%)10842(Top 67%)10842(Top 658%)
25K15.53 mi2.42 mi18599-31111852-12611852-12619940(Top 70%)12383(Top 77%)12383(Top 751%)
30K18.64 mi3.11 mi18473+12611771+8111771+8118027(Top 63%)11392(Top 71%)11392(Top 691%)
20M20.00 mi1.36 mi18980-50711958-18711958-18722583(Top 80%)13323(Top 83%)13323(Top 808%)
21M21.00 mi1.00 mi18587+39311765+19311765+19312194(Top 43%)8470(Top 53%)8470(Top 514%)
35K21.75 mi0.75 mi18351+23611645+12011645+12011942(Top 42%)8312(Top 52%)8312(Top 504%)
23M23.00 mi1.25 mi17994+35711453+19211453+19212505(Top 44%)8483(Top 53%)8483(Top 515%)
24M24.00 mi1.00 mi17803+19111327+12611327+12614292(Top 50%)9291(Top 58%)9291(Top 564%)
40K24.85 mi0.85 mi17617+18611225+10211225+10212543(Top 44%)8313(Top 52%)8313(Top 504%)
25.2M25.20 mi0.35 mi17516+10111166+5911166+5911468(Top 40%)7728(Top 48%)7728(Top 469%)
Finish26.22 mi1.02 mi17268+24811051+11511051+11510112(Top 36%)7049(Top 44%)7049(Top 428%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21story building
+97ft-345ft

Overall

18734

Males

11936

M55-59

11936

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

18287

Males

11754

M55-59

11754

10K→15K

6.2 - 9.3 mi

Top 66%
×3story building
+67ft-78ft

Overall

18734

Males

11936

M55-59

11936

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

21084

Males

12919

M55-59

12919

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

16169

Males

10842

M55-59

10842

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

19940

Males

12383

M55-59

12383

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

18027

Males

11392

M55-59

11392

30K→20M

18.6 - 20.0 mi

Top 80%
×5story building
+64ft-50ft

Overall

22583

Males

13323

M55-59

13323

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

12194

Males

8470

M55-59

8470

21M→35K

21.0 - 21.8 mi

Top 42%
×7story building
+17ft-86ft

Overall

11942

Males

8312

M55-59

8312

35K→23M

21.8 - 23.0 mi

Top 44%
×5story building
+23ft-63ft

Overall

12505

Males

8483

M55-59

8483

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

14292

Males

9291

M55-59

9291

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12543

Males

8313

M55-59

8313

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

11468

Males

7728

M55-59

7728

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

10112

Males

7049

M55-59

7049

Passing Analysis

Category:
Athletes Passed
2364
Passed By
5124
Net Change
-2760
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14508
5K → 10K172141-2124#14508#16632
10K → 15K53815-762#16632#17394
15K → 20K311050-1019#17394#18413
20K → Half1283+125#18413#18288
Half → 25K88399-311#18288#18599
25K → 30K298172+126#18599#18473
30K → 20M22529-507#18473#18980
20M → 21M3930+393#18980#18587
21M → 35K2360+236#18587#18351
35K → 23M3592+357#18351#17994
23M → 24M1987+191#17994#17803
24M → 40K1915+186#17803#17617
40K → 25.2M1010+101#17617#17516
25.2M → Finish2491+248#17516#17268
TOTALS23645124-2760
📊

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