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BOSTON MARATHON 2025

Shu-Hui Chang

Bib: 24257•F

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

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
8:44/mi
27:08
↑ 97↓ 3451.5%
10K· 6.21 mi
8:57/mi
54:56
↑ 79↓ 1380.4%
15K· 9.32 mi
9:41/mi
1:25:00
↑ 67↓ 78
20K· 12.43 mi
9:44/mi
1:55:15
↑ 106↓ 860.1%
Half· 13.11 mi
9:35/mi
2:01:47
↑ 19↓ 370.5%
25K· 15.53 mi
10:10/mi
2:26:26
↑ 66↓ 880.2%
30K· 18.64 mi
12:15/mi
3:04:28
↑ 181↓ 1480.2%
20M
11:24/mi
3:19:57
↑ 64↓ 500.2%
21M
13:43/mi
3:33:40
↑ 106↓ 241.6%
35K· 21.75 mi
11:23/mi
3:42:11
↑ 17↓ 861.7%
23M
11:38/mi
3:56:45
↑ 23↓ 630.6%
24M
11:17/mi
4:08:02
↓ 821.3%
40K· 24.85 mi
10:54/mi
4:17:21
↓ 200.3%
25.2M
12:14/mi
4:21:34
↑ 13↓ 160.2%
Finish· 26.22 mi
9:52/mi
4:31:37
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:47
Pace9:17 /mi
2nd Half
Distance13.11 mi
Time2:29:50
Pace11:26 /mi
📊Positive Split: 23.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:5927:088:4427:08
8:44
-
10K
6.21 mi11:53:4754:568:5027:48
8:57
+0:13
15K
9.32 mi12:23:511:25:009:0730:04
9:41
+0:44
20K
12.43 mi12:54:061:55:159:1630:15
9:44
+0:03
Half
13.11 mi13:00:382:01:479:176:32
9:35
-0:09
25K
15.53 mi13:25:172:26:269:2624:39
10:10
+0:35
30K
18.64 mi14:03:193:04:289:5438:02
12:15
+2:05
20M
20.00 mi14:18:483:19:5710:0015:29
11:24
-0:51
21M
21.00 mi14:32:313:33:4010:1013:43
13:43
+2:19
35K
21.75 mi14:41:023:42:1110:138:31
11:23
-2:20
23M
23.00 mi14:55:363:56:4510:1814:34
11:38
+0:15
24M
24.00 mi15:06:534:08:0210:2011:17
11:17
-0:21
40K
24.85 mi15:16:124:17:2110:219:19
10:54
-0:23
25.2M
25.20 mi15:20:254:21:3410:234:13
12:14
+1:20
Finish
26.22 mi15:30:284:31:3710:2210:03
9:52
-2:22

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

8:44 /mi

Average Pace

10:22 /mi

Slowest Pace

13:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:36:29

58% of race

Time at Steady Pace

44:36

16% of race

Time at Slower Pace

1:10:32

26% of race

Average Pace: 10:22 /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 mi11:25:5927:088:4427:08
8:44
#21186
10K
6.21 mi11:53:4754:568:5027:48
8:57
#21671
15K
9.32 mi12:23:511:25:009:0730:04
9:41
#22782
20K
12.43 mi12:54:061:55:159:1630:15
9:44
#23061
Half
13.11 mi13:00:382:01:479:176:32
9:35
#23095
25K
15.53 mi13:25:172:26:269:2624:39
10:10
#23197
30K
18.64 mi14:03:193:04:289:5438:02
12:15
#23952
20M
20.00 mi14:18:483:19:5710:0015:29
11:24
#24006
21M
21.00 mi14:32:313:33:4010:1013:43
13:43
#24172
35K
21.75 mi14:41:023:42:1110:138:31
11:23
#24211
23M
23.00 mi14:55:363:56:4510:1814:34
11:38
#24233
24M
24.00 mi15:06:534:08:0210:2011:17
11:17
#24245
40K
24.85 mi15:16:124:17:2110:219:19
10:54
#24214
25.2M
25.20 mi15:20:254:21:3410:234:13
12:14
#24210
Finish
26.22 mi15:30:284:31:3710:2210:03
9:52
#24161
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi211868191819124219(Top 85%)9795(Top 80%)9795(Top 985%)
10K6.21 mi3.10 mi21671-4858428-2378428-23722159(Top 78%)8692(Top 71%)8692(Top 874%)
15K9.32 mi3.11 mi22782-11119005-5779005-57724219(Top 85%)9795(Top 80%)9795(Top 985%)
20K12.43 mi3.11 mi23061-2799160-1559160-15523603(Top 83%)9484(Top 78%)9484(Top 954%)
Half13.11 mi0.68 mi23095-349178-189178-1823815(Top 84%)9602(Top 79%)9602(Top 966%)
25K15.53 mi2.42 mi23197-1029240-629240-6223661(Top 83%)9570(Top 78%)9570(Top 963%)
30K18.64 mi3.11 mi23952-7559706-4669706-46625874(Top 91%)10876(Top 89%)10876(Top 1094%)
20M20.00 mi1.36 mi24006-549756-509756-5024367(Top 86%)10150(Top 83%)10150(Top 1021%)
21M21.00 mi1.00 mi24172-1669858-1029858-10225914(Top 91%)10999(Top 90%)10999(Top 1107%)
35K21.75 mi0.75 mi24211-399890-329890-3224920(Top 88%)10542(Top 86%)10542(Top 1061%)
23M23.00 mi1.25 mi24233-229923-339923-3324488(Top 86%)10340(Top 85%)10340(Top 1040%)
24M24.00 mi1.00 mi24245-129930-79930-724542(Top 86%)10403(Top 85%)10403(Top 1047%)
40K24.85 mi0.85 mi24214+319933-39933-322927(Top 81%)9665(Top 79%)9665(Top 972%)
25.2M25.20 mi0.35 mi24210+49940-79940-723688(Top 83%)10020(Top 82%)10020(Top 1008%)
Finish26.22 mi1.02 mi24161+499922+189922+1822525(Top 79%)9430(Top 77%)9430(Top 949%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

24219

Females

9795

F55-59

9795

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

22159

Females

8692

F55-59

8692

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

24219

Females

9795

F55-59

9795

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

23603

Females

9484

F55-59

9484

20K→Half

12.4 - 13.1 mi

Top 84%
×2story building
+19ft-37ft

Overall

23815

Females

9602

F55-59

9602

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

23661

Females

9570

F55-59

9570

25K→30K

15.5 - 18.6 mi

Top 91%
×9story building
+181ft-148ft

Overall

25874

Females

10876

F55-59

10876

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

24367

Females

10150

F55-59

10150

20M→21M

20.0 - 21.0 mi

Top 91%
×8story building
+106ft-24ft

Overall

25914

Females

10999

F55-59

10999

21M→35K

21.0 - 21.8 mi

Top 88%
×7story building
+17ft-86ft

Overall

24920

Females

10542

F55-59

10542

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

24488

Females

10340

F55-59

10340

23M→24M

23.0 - 24.0 mi

Top 86%
×6story building
+12ft-82ft

Overall

24542

Females

10403

F55-59

10403

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

22927

Females

9665

F55-59

9665

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

23688

Females

10020

F55-59

10020

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2story building
+22ft-21ft

Overall

22525

Females

9430

F55-59

9430

Passing Analysis

Category:
Athletes Passed
728
Passed By
3703
Net Change
-2975
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21186
5K → 10K114599-485#21186#21671
10K → 15K291140-1111#21671#22782
15K → 20K103382-279#22782#23061
20K → Half1953-34#23061#23095
Half → 25K93195-102#23095#23197
25K → 30K26781-755#23197#23952
30K → 20M61115-54#23952#24006
20M → 21M17183-166#24006#24172
21M → 35K2463-39#24172#24211
35K → 23M6183-22#24211#24233
23M → 24M3951-12#24233#24245
24M → 40K5625+31#24245#24214
40K → 25.2M2521+4#24214#24210
25.2M → Finish6112+49#24210#24161
TOTALS7283703-2975
📊

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