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BOSTON MARATHON 2025

Sarah Tsang

Bib: 14712•F

AB

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 36%
Gender (Female)
#0 / 12228
Top 19%
Division (F18-39)
#0 / 5469
Top 34%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:04
Rank: #11584
Start → 5K
23:04 | 7:25/mi
10K· 6.21 mi
46:17
Rank: #11688 (-104)
5K → 10K
23:13 | 7:28/mi
15K· 9.32 mi
1:09:38
Rank: #11718 (-30)
10K → 15K
23:21 | 7:31/mi
20K· 12.43 mi
1:33:13
Rank: #11638 (+80)
15K → 20K
23:35 | 7:35/mi
Half· 13.11 mi
1:38:24
Rank: #11696 (-58)
20K → Half
5:11 | 7:36/mi
25K· 15.53 mi
1:56:49
Rank: #11503 (+193)
Half → 25K
18:25 | 7:36/mi
30K· 18.64 mi
2:21:01
Rank: #11155 (+348)
25K → 30K
24:12 | 7:47/mi
20M
2:31:38
Rank: #10941 (+214)
30K → 20M
10:37 | 7:49/mi
21M
2:39:51
Rank: #10765 (+176)
20M → 21M
8:13 | 8:13/mi
35K· 21.75 mi
2:45:39
Rank: #10744 (+21)
21M → 35K
5:48 | 7:45/mi
23M
2:55:40
Rank: #10645 (+99)
35K → 23M
10:01 | 8:00/mi
24M
3:03:24
Rank: #10558 (+87)
23M → 24M
7:44 | 7:44/mi
40K· 24.85 mi
3:10:07
Rank: #10480 (+78)
24M → 40K
6:43 | 7:51/mi
25.2M
3:13:01
Rank: #10422 (+58)
40K → 25.2M
2:54 | 8:25/mi
Finish· 26.22 mi
3:20:33
Rank: #10304 (+118)
25.2M → Finish
7:32 | 7:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:24
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:42:09
Pace7:48 /mi
📊Positive Split: 3.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:3223:047:2523:04
7:25
-
10K
6.21 mi11:16:4546:177:2723:13
7:28
+0:03
15K
9.32 mi11:40:061:09:387:2823:21
7:31
+0:03
20K
12.43 mi12:03:411:33:137:3023:35
7:35
+0:04
Half
13.11 mi12:08:521:38:247:305:11
7:36
+0:01
25K
15.53 mi12:27:171:56:497:3118:25
7:36
0:00
30K
18.64 mi12:51:292:21:017:3424:12
7:47
+0:11
20M
20.00 mi13:02:062:31:387:3510:37
7:49
+0:02
21M
21.00 mi13:10:192:39:517:378:13
8:13
+0:24
35K
21.75 mi13:16:072:45:397:375:48
7:45
-0:28
23M
23.00 mi13:26:082:55:407:3810:01
8:00
+0:15
24M
24.00 mi13:33:523:03:247:397:44
7:44
-0:16
40K
24.85 mi13:40:353:10:077:396:43
7:51
+0:07
25.2M
25.20 mi13:43:293:13:017:402:54
8:25
+0:34
Finish
26.22 mi13:51:013:20:337:397:32
7:24
-1:01

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

7:24 /mi

Average Pace

7:39 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:09:26

94% of race

Time at Steady Pace

11:07

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:39 /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 mi10:53:3223:047:2523:04
7:25
#11584
10K
6.21 mi11:16:4546:177:2723:13
7:28
#11688
15K
9.32 mi11:40:061:09:387:2823:21
7:31
#11718
20K
12.43 mi12:03:411:33:137:3023:35
7:35
#11638
Half
13.11 mi12:08:521:38:247:305:11
7:36
#11696
25K
15.53 mi12:27:171:56:497:3118:25
7:36
#11503
30K
18.64 mi12:51:292:21:017:3424:12
7:47
#11155
20M
20.00 mi13:02:062:31:387:3510:37
7:49
#10941
21M
21.00 mi13:10:192:39:517:378:13
8:13
#10765
35K
21.75 mi13:16:072:45:397:375:48
7:45
#10744
23M
23.00 mi13:26:082:55:407:3810:01
8:00
#10645
24M
24.00 mi13:33:523:03:247:397:44
7:44
#10558
40K
24.85 mi13:40:353:10:077:396:43
7:51
#10480
25.2M
25.20 mi13:43:293:13:017:402:54
8:25
#10422
Finish
26.22 mi13:51:013:20:337:397:32
7:24
#10304
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi115842567256711905(Top 42%)2848(Top 23%)2848(Top 52%)
10K6.21 mi3.10 mi11688-1042643-762643-7611854(Top 42%)2737(Top 22%)2737(Top 50%)
15K9.32 mi3.11 mi11718-302677-342677-3411905(Top 42%)2848(Top 23%)2848(Top 52%)
20K12.43 mi3.11 mi11638+802683-62683-611523(Top 41%)2748(Top 22%)2748(Top 50%)
Half13.11 mi0.68 mi11696-582714-312714-3112558(Top 44%)3242(Top 27%)3242(Top 59%)
25K15.53 mi2.42 mi11503+1932654+602654+6010736(Top 38%)2449(Top 20%)2449(Top 45%)
30K18.64 mi3.11 mi11155+3482547+1072547+1079871(Top 35%)2230(Top 18%)2230(Top 41%)
20M20.00 mi1.36 mi10941+2142479+682479+689147(Top 32%)2052(Top 17%)2052(Top 38%)
21M21.00 mi1.00 mi10765+1762430+492430+498711(Top 31%)2038(Top 17%)2038(Top 37%)
35K21.75 mi0.75 mi10744+212434-42434-410486(Top 37%)2837(Top 23%)2837(Top 52%)
23M23.00 mi1.25 mi10645+992426+82426+810048(Top 35%)2760(Top 23%)2760(Top 50%)
24M24.00 mi1.00 mi10558+872418+82418+89366(Top 33%)2499(Top 20%)2499(Top 46%)
40K24.85 mi0.85 mi10480+782402+162402+169205(Top 32%)2549(Top 21%)2549(Top 47%)
25.2M25.20 mi0.35 mi10422+582398+42398+48338(Top 29%)2218(Top 18%)2218(Top 41%)
Finish26.22 mi1.02 mi10304+1182377+212377+218461(Top 30%)2272(Top 19%)2272(Top 42%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21stories
+97ft-345ft

Overall

11905

Females

2848

F18-39

2848

5K→10K

3.1 - 6.2 mi

Top 42%
×5stories
+79ft-138ft

Overall

11854

Females

2737

F18-39

2737

10K→15K

6.2 - 9.3 mi

Top 42%
×3stories
+67ft-78ft

Overall

11905

Females

2848

F18-39

2848

15K→20K

9.3 - 12.4 mi

Top 41%
×5stories
+106ft-86ft

Overall

11523

Females

2748

F18-39

2748

20K→Half

12.4 - 13.1 mi

Top 44%
×2stories
+19ft-37ft

Overall

12558

Females

3242

F18-39

3242

Half→25K

13.1 - 15.5 mi

Top 38%
×4stories
+66ft-88ft

Overall

10736

Females

2449

F18-39

2449

25K→30K

15.5 - 18.6 mi

Top 35%
×9stories
+181ft-148ft

Overall

9871

Females

2230

F18-39

2230

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

9147

Females

2052

F18-39

2052

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8711

Females

2038

F18-39

2038

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

10486

Females

2837

F18-39

2837

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

10048

Females

2760

F18-39

2760

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

9366

Females

2499

F18-39

2499

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

9205

Females

2549

F18-39

2549

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

8338

Females

2218

F18-39

2218

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

8461

Females

2272

F18-39

2272

Passing Analysis

Category:
Athletes Passed
2364
Passed By
1084
Net Change
+1280
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11584
5K → 10K194298-104#11584#11688
10K → 15K168198-30#11688#11718
15K → 20K230150+80#11718#11638
20K → Half1674-58#11638#11696
Half → 25K25865+193#11696#11503
25K → 30K41466+348#11503#11155
30K → 20M23218+214#11155#10941
20M → 21M19923+176#10941#10765
21M → 35K6342+21#10765#10744
35K → 23M15152+99#10744#10645
23M → 24M12033+87#10645#10558
24M → 40K10325+78#10558#10480
40K → 25.2M7012+58#10480#10422
25.2M → Finish14628+118#10422#10304
TOTALS23641084+1280
📊

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