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BOSTON MARATHON 2025

Wai Sum Li

Bib: 28947•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
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
9:00/mi
27:59
↑ 97↓ 3451.5%
10K· 6.21 mi
9:06/mi
56:14
↑ 79↓ 1380.4%
15K· 9.32 mi
9:21/mi
1:25:16
↑ 67↓ 78
20K· 12.43 mi
9:30/mi
1:54:46
↑ 106↓ 860.1%
Half· 13.11 mi
9:16/mi
2:01:05
↑ 19↓ 370.5%
25K· 15.53 mi
9:46/mi
2:24:45
↑ 66↓ 880.2%
30K· 18.64 mi
10:09/mi
2:56:17
↑ 181↓ 1480.2%
20M
10:12/mi
3:10:08
↑ 64↓ 500.2%
21M
11:26/mi
3:21:34
↑ 106↓ 241.6%
35K· 21.75 mi
9:07/mi
3:28:23
↑ 17↓ 861.7%
23M
9:41/mi
3:40:31
↑ 23↓ 630.6%
24M
9:30/mi
3:50:01
↓ 821.3%
40K· 24.85 mi
9:41/mi
3:58:18
↓ 200.3%
25.2M
10:52/mi
4:02:03
↑ 13↓ 160.2%
Finish· 26.22 mi
9:23/mi
4:11:37
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:05
Pace9:14 /mi
2nd Half
Distance13.11 mi
Time2:10:32
Pace9:57 /mi
📊Positive Split: 7.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:1227:599:0027:59
9:00
-
10K
6.21 mi12:13:2756:149:0328:15
9:06
+0:06
15K
9.32 mi12:42:291:25:169:0929:02
9:21
+0:15
20K
12.43 mi13:11:591:54:469:1429:30
9:30
+0:09
Half
13.11 mi13:18:182:01:059:146:19
9:16
-0:14
25K
15.53 mi13:41:582:24:459:1923:40
9:46
+0:30
30K
18.64 mi14:13:302:56:179:2731:32
10:09
+0:23
20M
20.00 mi14:27:213:10:089:3013:51
10:12
+0:03
21M
21.00 mi14:38:473:21:349:3611:26
11:26
+1:14
35K
21.75 mi14:45:363:28:239:356:49
9:07
-2:19
23M
23.00 mi14:57:443:40:319:3512:08
9:41
+0:34
24M
24.00 mi15:07:143:50:019:359:30
9:30
-0:11
40K
24.85 mi15:15:313:58:189:358:17
9:41
+0:11
25.2M
25.20 mi15:19:164:02:039:363:45
10:52
+1:11
Finish
26.22 mi15:28:504:11:379:369:34
9:23
-1:29

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

9:00 /mi

Average Pace

9:36 /mi

Slowest Pace

11:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:03:03

25% of race

Time at Steady Pace

2:08:00

51% of race

Time at Slower Pace

1:00:34

24% of race

Average Pace: 9:36 /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 mi11:45:1227:599:0027:59
9:00
#22416
10K
6.21 mi12:13:2756:149:0328:15
9:06
#22616
15K
9.32 mi12:42:291:25:169:0929:02
9:21
#22903
20K
12.43 mi13:11:591:54:469:1429:30
9:30
#22931
Half
13.11 mi13:18:182:01:059:146:19
9:16
#22911
25K
15.53 mi13:41:582:24:459:1923:40
9:46
#22849
30K
18.64 mi14:13:302:56:179:2731:32
10:09
#22673
20M
20.00 mi14:27:213:10:089:3013:51
10:12
#22578
21M
21.00 mi14:38:473:21:349:3611:26
11:26
#22557
35K
21.75 mi14:45:363:28:239:356:49
9:07
#22430
23M
23.00 mi14:57:443:40:319:3512:08
9:41
#22238
24M
24.00 mi15:07:143:50:019:359:30
9:30
#22135
40K
24.85 mi15:15:313:58:189:358:17
9:41
#22024
25.2M
25.20 mi15:19:164:02:039:363:45
10:52
#21990
Finish
26.22 mi15:28:504:11:379:369:34
9:23
#21942
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi224168866886623325(Top 82%)9278(Top 76%)9278(Top 512%)
10K6.21 mi3.10 mi22616-2008949-838949-8322779(Top 80%)9014(Top 74%)9014(Top 497%)
15K9.32 mi3.11 mi22903-2879072-1239072-12323325(Top 82%)9278(Top 76%)9278(Top 512%)
20K12.43 mi3.11 mi22931-289089-179089-1722876(Top 81%)9082(Top 74%)9082(Top 501%)
Half13.11 mi0.68 mi22911+209077+129077+1222782(Top 80%)9035(Top 74%)9035(Top 498%)
25K15.53 mi2.42 mi22849+629062+159062+1522665(Top 80%)9019(Top 74%)9019(Top 497%)
30K18.64 mi3.11 mi22673+1769005+579005+5722053(Top 78%)8800(Top 72%)8800(Top 485%)
20M20.00 mi1.36 mi22578+958979+268979+2621535(Top 76%)8653(Top 71%)8653(Top 477%)
21M21.00 mi1.00 mi22557+218978+18978+122452(Top 79%)9223(Top 75%)9223(Top 509%)
35K21.75 mi0.75 mi22430+1278922+568922+5618719(Top 66%)7326(Top 60%)7326(Top 404%)
23M23.00 mi1.25 mi22238+1928851+718851+7119390(Top 68%)7731(Top 63%)7731(Top 426%)
24M24.00 mi1.00 mi22135+1038812+398812+3919608(Top 69%)7893(Top 65%)7893(Top 435%)
40K24.85 mi0.85 mi22024+1118771+418771+4119394(Top 68%)7845(Top 64%)7845(Top 433%)
25.2M25.20 mi0.35 mi21990+348758+138758+1320189(Top 71%)8278(Top 68%)8278(Top 457%)
Finish26.22 mi1.02 mi21942+488746+128746+1220718(Top 73%)8521(Top 70%)8521(Top 470%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

23325

Females

9278

F45-49

9278

5K→10K

3.1 - 6.2 mi

Top 80%
×5story building
+79ft-138ft

Overall

22779

Females

9014

F45-49

9014

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

23325

Females

9278

F45-49

9278

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

22876

Females

9082

F45-49

9082

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

22782

Females

9035

F45-49

9035

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

22665

Females

9019

F45-49

9019

25K→30K

15.5 - 18.6 mi

Top 78%
×9story building
+181ft-148ft

Overall

22053

Females

8800

F45-49

8800

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

21535

Females

8653

F45-49

8653

20M→21M

20.0 - 21.0 mi

Top 79%
×8story building
+106ft-24ft

Overall

22452

Females

9223

F45-49

9223

21M→35K

21.0 - 21.8 mi

Top 66%
×7story building
+17ft-86ft

Overall

18719

Females

7326

F45-49

7326

35K→23M

21.8 - 23.0 mi

Top 68%
×5story building
+23ft-63ft

Overall

19390

Females

7731

F45-49

7731

23M→24M

23.0 - 24.0 mi

Top 69%
×6story building
+12ft-82ft

Overall

19608

Females

7893

F45-49

7893

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19394

Females

7845

F45-49

7845

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

20189

Females

8278

F45-49

8278

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2story building
+22ft-21ft

Overall

20718

Females

8521

F45-49

8521

Passing Analysis

Category:
Athletes Passed
1771
Passed By
1297
Net Change
+474
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22416
5K → 10K168368-200#22416#22616
10K → 15K98385-287#22616#22903
15K → 20K169197-28#22903#22931
20K → Half4020+20#22931#22911
Half → 25K171109+62#22911#22849
25K → 30K24872+176#22849#22673
30K → 20M12631+95#22673#22578
20M → 21M8362+21#22578#22557
21M → 35K1292+127#22557#22430
35K → 23M1975+192#22430#22238
23M → 24M1063+103#22238#22135
24M → 40K12211+111#22135#22024
40K → 25.2M4410+34#22024#21990
25.2M → Finish7022+48#21990#21942
TOTALS17711297+474
📊

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