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BOSTON MARATHON 2025

Lai Kuen Hsu

Bib: 11693•F

ON

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 25%
Gender (Female)
#0 / 12228
Top 8%
Division (F18-39)
#0 / 5469
Top 15%
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
7:03/mi
21:53
↑ 97↓ 3451.5%
10K· 6.21 mi
7:06/mi
43:58
↑ 79↓ 1380.4%
15K· 9.32 mi
7:06/mi
1:06:02
↑ 67↓ 78
20K· 12.43 mi
7:10/mi
1:28:19
↑ 106↓ 860.1%
Half· 13.11 mi
7:07/mi
1:33:10
↑ 19↓ 370.5%
25K· 15.53 mi
7:09/mi
1:50:29
↑ 66↓ 880.2%
30K· 18.64 mi
7:18/mi
2:13:09
↑ 181↓ 1480.2%
20M
7:24/mi
2:23:12
↑ 64↓ 500.2%
21M
7:54/mi
2:31:06
↑ 106↓ 241.6%
35K· 21.75 mi
7:05/mi
2:36:24
↑ 17↓ 861.7%
23M
7:26/mi
2:45:42
↑ 23↓ 630.6%
24M
7:12/mi
2:52:54
↓ 821.3%
40K· 24.85 mi
7:24/mi
2:59:14
↓ 200.3%
25.2M
7:41/mi
3:01:53
↑ 13↓ 160.2%
Finish· 26.22 mi
7:41/mi
3:09:43
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:10
Pace7:06 /mi
2nd Half
Distance13.11 mi
Time1:36:33
Pace7:22 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:4421:537:0321:53
7:03
-
10K
6.21 mi11:10:4943:587:0522:05
7:06
+0:03
15K
9.32 mi11:32:531:06:027:0522:04
7:06
0:00
20K
12.43 mi11:55:101:28:197:0622:17
7:10
+0:04
Half
13.11 mi12:00:011:33:107:064:51
7:07
-0:03
25K
15.53 mi12:17:201:50:297:0717:19
7:09
+0:02
30K
18.64 mi12:40:002:13:097:0922:40
7:18
+0:09
20M
20.00 mi12:50:032:23:127:1010:03
7:24
+0:06
21M
21.00 mi12:57:572:31:067:127:54
7:54
+0:30
35K
21.75 mi13:03:152:36:247:115:18
7:05
-0:49
23M
23.00 mi13:12:332:45:427:129:18
7:26
+0:21
24M
24.00 mi13:19:452:52:547:127:12
7:12
-0:14
40K
24.85 mi13:26:052:59:147:136:20
7:24
+0:12
25.2M
25.20 mi13:28:443:01:537:132:39
7:41
+0:17
Finish
26.22 mi13:36:343:09:437:147:50
7:41
0:00

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

7:03 /mi

Average Pace

7:14 /mi

Slowest Pace

7:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:01:49

96% of race

Time at Steady Pace

7:54

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:14 /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 mi10:48:4421:537:0321:53
7:03
#8175
10K
6.21 mi11:10:4943:587:0522:05
7:06
#8478
15K
9.32 mi11:32:531:06:027:0522:04
7:06
#8374
20K
12.43 mi11:55:101:28:197:0622:17
7:10
#8231
Half
13.11 mi12:00:011:33:107:064:51
7:07
#8220
25K
15.53 mi12:17:201:50:297:0717:19
7:09
#8013
30K
18.64 mi12:40:002:13:097:0922:40
7:18
#7632
20M
20.00 mi12:50:032:23:127:1010:03
7:24
#7456
21M
21.00 mi12:57:572:31:067:127:54
7:54
#7350
35K
21.75 mi13:03:152:36:247:115:18
7:05
#7260
23M
23.00 mi13:12:332:45:427:129:18
7:26
#7137
24M
24.00 mi13:19:452:52:547:127:12
7:12
#7037
40K
24.85 mi13:26:052:59:147:136:20
7:24
#6949
25.2M
25.20 mi13:28:443:01:537:132:39
7:41
#6876
Finish
26.22 mi13:36:343:09:437:147:50
7:41
#6975
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8175104310438364(Top 29%)1184(Top 10%)1184(Top 22%)
10K6.21 mi3.10 mi8478-3031172-1291172-1298747(Top 31%)1278(Top 10%)1278(Top 23%)
15K9.32 mi3.11 mi8374+1041149+231149+238364(Top 29%)1184(Top 10%)1184(Top 22%)
20K12.43 mi3.11 mi8231+1431118+311118+317993(Top 28%)1100(Top 9%)1100(Top 20%)
Half13.11 mi0.68 mi8220+111117+11117+18386(Top 30%)1224(Top 10%)1224(Top 22%)
25K15.53 mi2.42 mi8013+2071057+601057+607244(Top 26%)942(Top 8%)942(Top 17%)
30K18.64 mi3.11 mi7632+381965+92965+926442(Top 23%)812(Top 7%)812(Top 15%)
20M20.00 mi1.36 mi7456+176940+25940+256376(Top 22%)916(Top 7%)916(Top 17%)
21M21.00 mi1.00 mi7350+1069409406805(Top 24%)1220(Top 10%)1220(Top 22%)
35K21.75 mi0.75 mi7260+90932+8932+85941(Top 21%)909(Top 7%)909(Top 17%)
23M23.00 mi1.25 mi7137+123936-4936-46224(Top 22%)1103(Top 9%)1103(Top 20%)
24M24.00 mi1.00 mi7037+100931+5931+55857(Top 21%)1014(Top 8%)1014(Top 19%)
40K24.85 mi0.85 mi6949+88926+5926+56277(Top 22%)1237(Top 10%)1237(Top 23%)
25.2M25.20 mi0.35 mi6876+73913+13913+134380(Top 15%)702(Top 6%)702(Top 13%)
Finish26.22 mi1.02 mi6975-99979-66979-6610548(Top 37%)3262(Top 27%)3262(Top 60%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21story building
+97ft-345ft

Overall

8364

Females

1184

F18-39

1184

5K→10K

3.1 - 6.2 mi

Top 31%
×5story building
+79ft-138ft

Overall

8747

Females

1278

F18-39

1278

10K→15K

6.2 - 9.3 mi

Top 29%
×3story building
+67ft-78ft

Overall

8364

Females

1184

F18-39

1184

15K→20K

9.3 - 12.4 mi

Top 28%
×5story building
+106ft-86ft

Overall

7993

Females

1100

F18-39

1100

20K→Half

12.4 - 13.1 mi

Top 30%
×2story building
+19ft-37ft

Overall

8386

Females

1224

F18-39

1224

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

7244

Females

942

F18-39

942

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6442

Females

812

F18-39

812

30K→20M

18.6 - 20.0 mi

Top 22%
×5story building
+64ft-50ft

Overall

6376

Females

916

F18-39

916

20M→21M

20.0 - 21.0 mi

Top 24%
×8story building
+106ft-24ft

Overall

6805

Females

1220

F18-39

1220

21M→35K

21.0 - 21.8 mi

Top 21%
×7story building
+17ft-86ft

Overall

5941

Females

909

F18-39

909

35K→23M

21.8 - 23.0 mi

Top 22%
×5story building
+23ft-63ft

Overall

6224

Females

1103

F18-39

1103

23M→24M

23.0 - 24.0 mi

Top 21%
×6story building
+12ft-82ft

Overall

5857

Females

1014

F18-39

1014

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

6277

Females

1237

F18-39

1237

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4380

Females

702

F18-39

702

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2story building
+22ft-21ft

Overall

10548

Females

3262

F18-39

3262

Passing Analysis

Category:
Athletes Passed
2131
Passed By
931
Net Change
+1200
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8175
5K → 10K97400-303#8175#8478
10K → 15K210106+104#8478#8374
15K → 20K22784+143#8374#8231
20K → Half2312+11#8231#8220
Half → 25K24437+207#8220#8013
25K → 30K41938+381#8013#7632
30K → 20M19216+176#7632#7456
20M → 21M13428+106#7456#7350
21M → 35K955+90#7350#7260
35K → 23M15734+123#7260#7137
23M → 24M11818+100#7137#7037
24M → 40K10416+88#7037#6949
40K → 25.2M752+73#6949#6876
25.2M → Finish36135-99#6876#6975
TOTALS2131931+1200
📊

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