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BOSTON MARATHON 2025

Susie Chang

Bib: 23700•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
27:02
Rank: #21035
Start → 5K
27:02 | 8:42/mi
10K· 6.21 mi
54:35
Rank: #21377 (-342)
5K → 10K
27:33 | 8:52/mi
15K· 9.32 mi
1:22:10
Rank: #21351 (+26)
10K → 15K
27:35 | 8:53/mi
20K· 12.43 mi
1:51:25
Rank: #21784 (-433)
15K → 20K
29:15 | 9:25/mi
Half· 13.11 mi
1:57:43
Rank: #21825 (-41)
20K → Half
6:18 | 9:14/mi
25K· 15.53 mi
2:21:42
Rank: #22114 (-289)
Half → 25K
23:59 | 9:54/mi
30K· 18.64 mi
2:55:44
Rank: #22585 (-471)
25K → 30K
34:02 | 10:57/mi
20M
3:10:32
Rank: #22644 (-59)
30K → 20M
14:48 | 10:53/mi
21M
3:22:33
Rank: #22713 (-69)
20M → 21M
12:01 | 12:01/mi
35K· 21.75 mi
3:29:56
Rank: #22644 (+69)
21M → 35K
7:23 | 9:52/mi
23M
3:43:08
Rank: #22600 (+44)
35K → 23M
13:12 | 10:33/mi
24M
3:52:19
Rank: #22425 (+175)
23M → 24M
9:11 | 9:11/mi
40K· 24.85 mi
4:00:09
Rank: #22277 (+148)
24M → 40K
7:50 | 9:10/mi
25.2M
4:03:32
Rank: #22211 (+66)
40K → 25.2M
3:23 | 9:49/mi
Finish· 26.22 mi
4:12:39
Rank: #22077 (+134)
25.2M → Finish
9:07 | 8:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:43
Pace8:59 /mi
2nd Half
Distance13.11 mi
Time2:14:56
Pace10:18 /mi
📊Positive Split: 14.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:26:2727:028:4227:02
8:42
-
10K
6.21 mi11:54:0054:358:4727:33
8:52
+0:10
15K
9.32 mi12:21:351:22:108:4927:35
8:53
+0:01
20K
12.43 mi12:50:501:51:258:5829:15
9:25
+0:32
Half
13.11 mi12:57:081:57:438:596:18
9:14
-0:11
25K
15.53 mi13:21:072:21:429:0723:59
9:54
+0:40
30K
18.64 mi13:55:092:55:449:2634:02
10:57
+1:03
20M
20.00 mi14:09:573:10:329:3214:48
10:53
-0:04
21M
21.00 mi14:21:583:22:339:3912:01
12:01
+1:08
35K
21.75 mi14:29:213:29:569:397:23
9:52
-2:09
23M
23.00 mi14:42:333:43:089:4213:12
10:33
+0:41
24M
24.00 mi14:51:443:52:199:419:11
9:11
-1:22
40K
24.85 mi14:59:344:00:099:407:50
9:10
-0:01
25.2M
25.20 mi15:02:574:03:329:403:23
9:49
+0:39
Finish
26.22 mi15:12:044:12:399:399:07
8:57
-0:52

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

8:42 /mi

Average Pace

9:39 /mi

Slowest Pace

12:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:17

36% of race

Time at Steady Pace

1:03:20

25% of race

Time at Slower Pace

1:38:02

39% of race

Average Pace: 9:38 /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 mi11:26:2727:028:4227:02
8:42
#21035
10K
6.21 mi11:54:0054:358:4727:33
8:52
#21377
15K
9.32 mi12:21:351:22:108:4927:35
8:53
#21351
20K
12.43 mi12:50:501:51:258:5829:15
9:25
#21784
Half
13.11 mi12:57:081:57:438:596:18
9:14
#21825
25K
15.53 mi13:21:072:21:429:0723:59
9:54
#22114
30K
18.64 mi13:55:092:55:449:2634:02
10:57
#22585
20M
20.00 mi14:09:573:10:329:3214:48
10:53
#22644
21M
21.00 mi14:21:583:22:339:3912:01
12:01
#22713
35K
21.75 mi14:29:213:29:569:397:23
9:52
#22644
23M
23.00 mi14:42:333:43:089:4213:12
10:33
#22600
24M
24.00 mi14:51:443:52:199:419:11
9:11
#22425
40K
24.85 mi14:59:344:00:099:407:50
9:10
#22277
25.2M
25.20 mi15:02:574:03:329:403:23
9:49
#22211
Finish
26.22 mi15:12:044:12:399:399:07
8:57
#22077
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi210358104810421466(Top 76%)8261(Top 68%)8261(Top 831%)
10K6.21 mi3.10 mi21377-3428260-1568260-15621745(Top 77%)8449(Top 69%)8449(Top 850%)
15K9.32 mi3.11 mi21351+268219+418219+4121466(Top 76%)8261(Top 68%)8261(Top 831%)
20K12.43 mi3.11 mi21784-4338486-2678486-26722624(Top 80%)8933(Top 73%)8933(Top 899%)
Half13.11 mi0.68 mi21825-418506-208506-2022758(Top 80%)9012(Top 74%)9012(Top 907%)
25K15.53 mi2.42 mi22114-2898661-1558661-15522989(Top 81%)9188(Top 75%)9188(Top 924%)
30K18.64 mi3.11 mi22585-4718961-3008961-30023926(Top 84%)9831(Top 80%)9831(Top 989%)
20M20.00 mi1.36 mi22644-599011-509011-5023375(Top 82%)9610(Top 79%)9610(Top 967%)
21M21.00 mi1.00 mi22713-699066-559066-5523630(Top 83%)9829(Top 80%)9829(Top 989%)
35K21.75 mi0.75 mi22644+699043+239043+2321541(Top 76%)8796(Top 72%)8796(Top 885%)
23M23.00 mi1.25 mi22600+449042+19042+122137(Top 78%)9139(Top 75%)9139(Top 919%)
24M24.00 mi1.00 mi22425+1758968+748968+7418313(Top 64%)7215(Top 59%)7215(Top 726%)
40K24.85 mi0.85 mi22277+1488906+628906+6217220(Top 61%)6715(Top 55%)6715(Top 676%)
25.2M25.20 mi0.35 mi22211+668874+328874+3216255(Top 57%)6240(Top 51%)6240(Top 628%)
Finish26.22 mi1.02 mi22077+1348825+498825+4918802(Top 66%)7498(Top 61%)7498(Top 754%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21stories
+97ft-345ft

Overall

21466

Females

8261

F55-59

8261

5K→10K

3.1 - 6.2 mi

Top 77%
×5stories
+79ft-138ft

Overall

21745

Females

8449

F55-59

8449

10K→15K

6.2 - 9.3 mi

Top 76%
×3stories
+67ft-78ft

Overall

21466

Females

8261

F55-59

8261

15K→20K

9.3 - 12.4 mi

Top 80%
×5stories
+106ft-86ft

Overall

22624

Females

8933

F55-59

8933

20K→Half

12.4 - 13.1 mi

Top 80%
×2stories
+19ft-37ft

Overall

22758

Females

9012

F55-59

9012

Half→25K

13.1 - 15.5 mi

Top 81%
×4stories
+66ft-88ft

Overall

22989

Females

9188

F55-59

9188

25K→30K

15.5 - 18.6 mi

Top 84%
×9stories
+181ft-148ft

Overall

23926

Females

9831

F55-59

9831

30K→20M

18.6 - 20.0 mi

Top 82%
×5stories
+64ft-50ft

Overall

23375

Females

9610

F55-59

9610

20M→21M

20.0 - 21.0 mi

Top 83%
×8stories
+106ft-24ft

Overall

23630

Females

9829

F55-59

9829

21M→35K

21.0 - 21.8 mi

Top 76%
×7stories
+17ft-86ft

Overall

21541

Females

8796

F55-59

8796

35K→23M

21.8 - 23.0 mi

Top 78%
×5stories
+23ft-63ft

Overall

22137

Females

9139

F55-59

9139

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

18313

Females

7215

F55-59

7215

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

17220

Females

6715

F55-59

6715

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16255

Females

6240

F55-59

6240

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2stories
+22ft-21ft

Overall

18802

Females

7498

F55-59

7498

Passing Analysis

Category:
Athletes Passed
1442
Passed By
2484
Net Change
-1042
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21035
5K → 10K154496-342#21035#21377
10K → 15K225199+26#21377#21351
15K → 20K85518-433#21351#21784
20K → Half2061-41#21784#21825
Half → 25K70359-289#21825#22114
25K → 30K76547-471#22114#22585
30K → 20M54113-59#22585#22644
20M → 21M53122-69#22644#22713
21M → 35K8213+69#22713#22644
35K → 23M9551+44#22644#22600
23M → 24M1761+175#22600#22425
24M → 40K1480+148#22425#22277
40K → 25.2M682+66#22277#22211
25.2M → Finish1362+134#22211#22077
TOTALS14422484-1042
📊

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