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BOSTON MARATHON 2025

Yau Har Tsui

Bib: 23310•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:43
Rank: #23357
Start → 5K
28:43 | 9:15/mi
10K· 6.21 mi
58:23
Rank: #23864 (-507)
5K → 10K
29:40 | 9:33/mi
15K· 9.32 mi
1:29:30
Rank: #24317 (-453)
10K → 15K
31:07 | 10:01/mi
20K· 12.43 mi
2:07:12
Rank: #25495 (-1178)
15K → 20K
37:42 | 12:08/mi
Half· 13.11 mi
2:13:52
Rank: #25432 (+63)
20K → Half
6:40 | 9:46/mi
25K· 15.53 mi
2:41:11
Rank: #25463 (-31)
Half → 25K
27:19 | 11:16/mi
30K· 18.64 mi
3:19:01
Rank: #25550 (-87)
25K → 30K
37:50 | 12:11/mi
20M
3:37:19
Rank: #25692 (-142)
30K → 20M
18:18 | 13:28/mi
21M
3:55:43
Rank: #26075 (-383)
20M → 21M
18:24 | 18:24/mi
35K· 21.75 mi
4:04:36
Rank: #26066 (+9)
21M → 35K
8:53 | 11:52/mi
23M
4:22:05
Rank: #26186 (-120)
35K → 23M
17:29 | 13:58/mi
24M
4:33:33
Rank: #26131 (+55)
23M → 24M
11:28 | 11:28/mi
40K· 24.85 mi
4:43:21
Rank: #26094 (+37)
24M → 40K
9:48 | 11:28/mi
25.2M
4:48:08
Rank: #26103 (-9)
40K → 25.2M
4:47 | 13:52/mi
Finish· 26.22 mi
4:58:06
Rank: #26031 (+72)
25.2M → Finish
9:58 | 9:47/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:13:52
Pace10:13 /mi
2nd Half
Distance13.11 mi
Time2:44:14
Pace12:32 /mi
📊Positive Split: 22.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:0028:439:1528:43
9:15
-
10K
6.21 mi11:57:4058:239:2429:40
9:33
+0:18
15K
9.32 mi12:28:471:29:309:3631:07
10:01
+0:28
20K
12.43 mi13:06:292:07:1210:1437:42
12:08
+2:07
Half
13.11 mi13:13:092:13:5210:136:40
9:46
-2:22
25K
15.53 mi13:40:282:41:1110:2327:19
11:16
+1:30
30K
18.64 mi14:18:183:19:0110:4137:50
12:11
+0:55
20M
20.00 mi14:36:363:37:1910:5218:18
13:28
+1:17
21M
21.00 mi14:55:003:55:4311:1318:24
18:24
+4:56
35K
21.75 mi15:03:534:04:3611:158:53
11:52
-6:32
23M
23.00 mi15:21:224:22:0511:2417:29
13:58
+2:06
24M
24.00 mi15:32:504:33:3311:2411:28
11:28
-2:30
40K
24.85 mi15:42:384:43:2111:249:48
11:28
0:00
25.2M
25.20 mi15:47:254:48:0811:264:47
13:52
+2:24
Finish
26.22 mi15:57:234:58:0611:239:58
9:47
-4:05

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

9:15 /mi

Average Pace

11:23 /mi

Slowest Pace

18:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:08

36% of race

Time at Steady Pace

2:13:00

45% of race

Time at Slower Pace

58:58

20% of race

Average Pace: 11:22 /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 mi11:28:0028:439:1528:43
9:15
#23357
10K
6.21 mi11:57:4058:239:2429:40
9:33
#23864
15K
9.32 mi12:28:471:29:309:3631:07
10:01
#24317
20K
12.43 mi13:06:292:07:1210:1437:42
12:08
#25495
Half
13.11 mi13:13:092:13:5210:136:40
9:46
#25432
25K
15.53 mi13:40:282:41:1110:2327:19
11:16
#25463
30K
18.64 mi14:18:183:19:0110:4137:50
12:11
#25550
20M
20.00 mi14:36:363:37:1910:5218:18
13:28
#25692
21M
21.00 mi14:55:003:55:4311:1318:24
18:24
#26075
35K
21.75 mi15:03:534:04:3611:158:53
11:52
#26066
23M
23.00 mi15:21:224:22:0511:2417:29
13:58
#26186
24M
24.00 mi15:32:504:33:3311:2411:28
11:28
#26131
40K
24.85 mi15:42:384:43:2111:249:48
11:28
#26094
25.2M
25.20 mi15:47:254:48:0811:264:47
13:52
#26103
Finish
26.22 mi15:57:234:58:0611:239:58
9:47
#26031
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi233579364936425017(Top 88%)10222(Top 84%)10222(Top 784%)
10K6.21 mi3.10 mi23864-5079611-2479611-24724229(Top 85%)9825(Top 80%)9825(Top 754%)
15K9.32 mi3.11 mi24317-4539852-2419852-24125017(Top 88%)10222(Top 84%)10222(Top 784%)
20K12.43 mi3.11 mi25495-117810508-65610508-65627227(Top 96%)11538(Top 94%)11538(Top 885%)
Half13.11 mi0.68 mi25432+6310473+3510473+3524281(Top 85%)9870(Top 81%)9870(Top 757%)
25K15.53 mi2.42 mi25463-3110501-2810501-2825571(Top 90%)10616(Top 87%)10616(Top 815%)
30K18.64 mi3.11 mi25550-8710592-9110592-9125803(Top 91%)10841(Top 89%)10841(Top 832%)
20M20.00 mi1.36 mi25692-14210677-8510677-8526855(Top 95%)11479(Top 94%)11479(Top 881%)
21M21.00 mi1.00 mi26075-38310889-21210889-21228308(Top 100%)12191(Top 100%)12191(Top 936%)
35K21.75 mi0.75 mi26066+910896-710896-725662(Top 90%)10932(Top 89%)10932(Top 839%)
23M23.00 mi1.25 mi26186-12010969-7310969-7327284(Top 96%)11747(Top 96%)11747(Top 902%)
24M24.00 mi1.00 mi26131+5510949+2010949+2024830(Top 87%)10553(Top 86%)10553(Top 810%)
40K24.85 mi0.85 mi26094+3710933+1610933+1624051(Top 85%)10195(Top 83%)10195(Top 782%)
25.2M25.20 mi0.35 mi26103-910942-910942-926105(Top 92%)11232(Top 92%)11232(Top 862%)
Finish26.22 mi1.02 mi26031+7210908+3410908+3422172(Top 78%)9259(Top 76%)9259(Top 711%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21stories
+97ft-345ft

Overall

25017

Females

10222

F50-54

10222

5K→10K

3.1 - 6.2 mi

Top 85%
×5stories
+79ft-138ft

Overall

24229

Females

9825

F50-54

9825

10K→15K

6.2 - 9.3 mi

Top 88%
×3stories
+67ft-78ft

Overall

25017

Females

10222

F50-54

10222

15K→20K

9.3 - 12.4 mi

Top 96%
×5stories
+106ft-86ft

Overall

27227

Females

11538

F50-54

11538

20K→Half

12.4 - 13.1 mi

Top 85%
×2stories
+19ft-37ft

Overall

24281

Females

9870

F50-54

9870

Half→25K

13.1 - 15.5 mi

Top 90%
×4stories
+66ft-88ft

Overall

25571

Females

10616

F50-54

10616

25K→30K

15.5 - 18.6 mi

Top 91%
×9stories
+181ft-148ft

Overall

25803

Females

10841

F50-54

10841

30K→20M

18.6 - 20.0 mi

Top 95%
×5stories
+64ft-50ft

Overall

26855

Females

11479

F50-54

11479

20M→21M

20.0 - 21.0 mi

Top 100%
×8stories
+106ft-24ft

Overall

28308

Females

12191

F50-54

12191

21M→35K

21.0 - 21.8 mi

Top 90%
×7stories
+17ft-86ft

Overall

25662

Females

10932

F50-54

10932

35K→23M

21.8 - 23.0 mi

Top 96%
×5stories
+23ft-63ft

Overall

27284

Females

11747

F50-54

11747

23M→24M

23.0 - 24.0 mi

Top 87%
×6stories
+12ft-82ft

Overall

24830

Females

10553

F50-54

10553

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

24051

Females

10195

F50-54

10195

40K→25.2M

24.9 - 25.2 mi

Top 92%
×1story
+13ft-16ft

Overall

26105

Females

11232

F50-54

11232

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2stories
+22ft-21ft

Overall

22172

Females

9259

F50-54

9259

Passing Analysis

Category:
Athletes Passed
639
Passed By
3313
Net Change
-2674
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23357
5K → 10K89596-507#23357#23864
10K → 15K42495-453#23864#24317
15K → 20K51183-1178#24317#25495
20K → Half630+63#25495#25432
Half → 25K90121-31#25432#25463
25K → 30K88175-87#25463#25550
30K → 20M21163-142#25550#25692
20M → 21M4387-383#25692#26075
21M → 35K3627+9#26075#26066
35K → 23M11131-120#26066#26186
23M → 24M627+55#26186#26131
24M → 40K4710+37#26131#26094
40K → 25.2M716-9#26094#26103
25.2M → Finish742+72#26103#26031
TOTALS6393313-2674
📊

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