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BOSTON MARATHON 2025

Jackie Eunhee Sung

Bib: 21052•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F55-59)
#0 / 994
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:48
Rank: #18761
Start → 5K
25:48 | 8:18/mi
10K· 6.21 mi
53:23
Rank: #20357 (-1596)
5K → 10K
27:35 | 8:53/mi
15K· 9.32 mi
1:27:18
Rank: #23648 (-3291)
10K → 15K
33:55 | 10:55/mi
20K· 12.43 mi
2:02:32
Rank: #24666 (-1018)
15K → 20K
35:14 | 11:20/mi
Half· 13.11 mi
2:09:33
Rank: #24709 (-43)
20K → Half
7:01 | 10:17/mi
25K· 15.53 mi
2:35:41
Rank: #24765 (-56)
Half → 25K
26:08 | 10:47/mi
30K· 18.64 mi
3:12:43
Rank: #24948 (-183)
25K → 30K
37:02 | 11:55/mi
20M
3:28:49
Rank: #24961 (-13)
30K → 20M
16:06 | 11:51/mi
21M
3:41:32
Rank: #24965 (-4)
20M → 21M
12:43 | 12:43/mi
35K· 21.75 mi
3:49:05
Rank: #24881 (+84)
21M → 35K
7:33 | 10:06/mi
23M
4:03:22
Rank: #24852 (+29)
35K → 23M
14:17 | 11:24/mi
24M
4:13:40
Rank: #24763 (+89)
23M → 24M
10:18 | 10:18/mi
40K· 24.85 mi
4:22:38
Rank: #24675 (+88)
24M → 40K
8:58 | 10:29/mi
25.2M
4:26:56
Rank: #24674 (+1)
40K → 25.2M
4:18 | 12:28/mi
Finish· 26.22 mi
4:36:42
Rank: #24586 (+88)
25.2M → Finish
9:46 | 9:35/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:09:33
Pace9:53 /mi
2nd Half
Distance13.11 mi
Time2:27:09
Pace11:14 /mi
📊Positive Split: 13.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:1925:488:1825:48
8:18
-
10K
6.21 mi11:46:5453:238:3527:35
8:53
+0:35
15K
9.32 mi12:20:491:27:189:2233:55
10:55
+2:02
20K
12.43 mi12:56:032:02:329:5235:14
11:20
+0:25
Half
13.11 mi13:03:042:09:339:537:01
10:17
-1:03
25K
15.53 mi13:29:122:35:4110:0126:08
10:47
+0:30
30K
18.64 mi14:06:143:12:4310:2037:02
11:55
+1:08
20M
20.00 mi14:22:203:28:4910:2616:06
11:51
-0:04
21M
21.00 mi14:35:033:41:3210:3312:43
12:43
+0:52
35K
21.75 mi14:42:363:49:0510:327:33
10:06
-2:37
23M
23.00 mi14:56:534:03:2210:3514:17
11:24
+1:18
24M
24.00 mi15:07:114:13:4010:3410:18
10:18
-1:06
40K
24.85 mi15:16:094:22:3810:348:58
10:29
+0:11
25.2M
25.20 mi15:20:274:26:5610:364:18
12:28
+1:59
Finish
26.22 mi15:30:134:36:4210:349:46
9:35
-2:53

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

8:18 /mi

Average Pace

10:34 /mi

Slowest Pace

12:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:10:42

26% of race

Time at Steady Pace

2:01:34

44% of race

Time at Slower Pace

1:24:26

31% of race

Average Pace: 10:33 /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 mi11:19:1925:488:1825:48
8:18
#18761
10K
6.21 mi11:46:5453:238:3527:35
8:53
#20357
15K
9.32 mi12:20:491:27:189:2233:55
10:55
#23648
20K
12.43 mi12:56:032:02:329:5235:14
11:20
#24666
Half
13.11 mi13:03:042:09:339:537:01
10:17
#24709
25K
15.53 mi13:29:122:35:4110:0126:08
10:47
#24765
30K
18.64 mi14:06:143:12:4310:2037:02
11:55
#24948
20M
20.00 mi14:22:203:28:4910:2616:06
11:51
#24961
21M
21.00 mi14:35:033:41:3210:3312:43
12:43
#24965
35K
21.75 mi14:42:363:49:0510:327:33
10:06
#24881
23M
23.00 mi14:56:534:03:2210:3514:17
11:24
#24852
24M
24.00 mi15:07:114:13:4010:3410:18
10:18
#24763
40K
24.85 mi15:16:094:22:3810:348:58
10:29
#24675
25.2M
25.20 mi15:20:274:26:5610:364:18
12:28
#24674
Finish
26.22 mi15:30:134:36:4210:349:46
9:35
#24586
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi187616779677926569(Top 94%)11109(Top 91%)11109(Top 1118%)
10K6.21 mi3.10 mi20357-15967688-9097688-90921821(Top 77%)8497(Top 69%)8497(Top 855%)
15K9.32 mi3.11 mi23648-32919485-17979485-179726569(Top 94%)11109(Top 91%)11109(Top 1118%)
20K12.43 mi3.11 mi24666-101810053-56810053-56826439(Top 93%)11059(Top 90%)11059(Top 1113%)
Half13.11 mi0.68 mi24709-4310075-2210075-2225435(Top 90%)10507(Top 86%)10507(Top 1057%)
25K15.53 mi2.42 mi24765-5610128-5310128-5324875(Top 88%)10218(Top 84%)10218(Top 1028%)
30K18.64 mi3.11 mi24948-18310248-12010248-12025482(Top 90%)10665(Top 87%)10665(Top 1073%)
20M20.00 mi1.36 mi24961-1310274-2610274-2625059(Top 88%)10508(Top 86%)10508(Top 1057%)
21M21.00 mi1.00 mi24965-410287-1310287-1324703(Top 87%)10405(Top 85%)10405(Top 1047%)
35K21.75 mi0.75 mi24881+8410245+4210245+4222188(Top 78%)9139(Top 75%)9139(Top 919%)
23M23.00 mi1.25 mi24852+29102451024524099(Top 85%)10151(Top 83%)10151(Top 1021%)
24M24.00 mi1.00 mi24763+8910214+3110214+3122272(Top 78%)9279(Top 76%)9279(Top 934%)
40K24.85 mi0.85 mi24675+8810183+3110183+3121920(Top 77%)9165(Top 75%)9165(Top 922%)
25.2M25.20 mi0.35 mi24674+110186-310186-324164(Top 85%)10256(Top 84%)10256(Top 1032%)
Finish26.22 mi1.02 mi24586+8810145+4110145+4121523(Top 76%)8930(Top 73%)8930(Top 898%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21stories
+97ft-345ft

Overall

26569

Females

11109

F55-59

11109

5K→10K

3.1 - 6.2 mi

Top 77%
×5stories
+79ft-138ft

Overall

21821

Females

8497

F55-59

8497

10K→15K

6.2 - 9.3 mi

Top 94%
×3stories
+67ft-78ft

Overall

26569

Females

11109

F55-59

11109

15K→20K

9.3 - 12.4 mi

Top 93%
×5stories
+106ft-86ft

Overall

26439

Females

11059

F55-59

11059

20K→Half

12.4 - 13.1 mi

Top 90%
×2stories
+19ft-37ft

Overall

25435

Females

10507

F55-59

10507

Half→25K

13.1 - 15.5 mi

Top 88%
×4stories
+66ft-88ft

Overall

24875

Females

10218

F55-59

10218

25K→30K

15.5 - 18.6 mi

Top 90%
×9stories
+181ft-148ft

Overall

25482

Females

10665

F55-59

10665

30K→20M

18.6 - 20.0 mi

Top 88%
×5stories
+64ft-50ft

Overall

25059

Females

10508

F55-59

10508

20M→21M

20.0 - 21.0 mi

Top 87%
×8stories
+106ft-24ft

Overall

24703

Females

10405

F55-59

10405

21M→35K

21.0 - 21.8 mi

Top 78%
×7stories
+17ft-86ft

Overall

22188

Females

9139

F55-59

9139

35K→23M

21.8 - 23.0 mi

Top 85%
×5stories
+23ft-63ft

Overall

24099

Females

10151

F55-59

10151

23M→24M

23.0 - 24.0 mi

Top 78%
×6stories
+12ft-82ft

Overall

22272

Females

9279

F55-59

9279

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21920

Females

9165

F55-59

9165

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

24164

Females

10256

F55-59

10256

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2stories
+22ft-21ft

Overall

21523

Females

8930

F55-59

8930

Passing Analysis

Category:
Athletes Passed
729
Passed By
6554
Net Change
-5825
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18761
5K → 10K211617-1596#18761#20357
10K → 15K93300-3291#20357#23648
15K → 20K61024-1018#23648#24666
20K → Half1962-43#24666#24709
Half → 25K71127-56#24709#24765
25K → 30K76259-183#24765#24948
30K → 20M5164-13#24948#24961
20M → 21M4549-4#24961#24965
21M → 35K906+84#24965#24881
35K → 23M5526+29#24881#24852
23M → 24M912+89#24852#24763
24M → 40K902+88#24763#24675
40K → 25.2M1312+1#24675#24674
25.2M → Finish924+88#24674#24586
TOTALS7296554-5825
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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