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BOSTON MARATHON 2025

Mengru Li

Bib: 17778•F

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:44
Rank: #20472
Start → 5K
26:44 | 8:36/mi
10K· 6.21 mi
57:25
Rank: #23343 (-2871)
5K → 10K
30:41 | 9:53/mi
15K· 9.32 mi
1:29:50
Rank: #24410 (-1067)
10K → 15K
32:25 | 10:26/mi
20K· 12.43 mi
2:05:20
Rank: #25211 (-801)
15K → 20K
35:30 | 11:26/mi
Half· 13.11 mi
2:13:56
Rank: #25442 (-231)
20K → Half
8:36 | 12:36/mi
25K· 15.53 mi
2:49:43
Rank: #26382 (-940)
Half → 25K
35:47 | 14:46/mi
30K· 18.64 mi
3:33:43
Rank: #26733 (-351)
25K → 30K
44:00 | 14:10/mi
20M
3:51:33
Rank: #26749 (-16)
30K → 20M
17:50 | 13:07/mi
21M
4:08:02
Rank: #26882 (-133)
20M → 21M
16:29 | 16:29/mi
35K· 21.75 mi
4:17:13
Rank: #26866 (+16)
21M → 35K
9:11 | 12:17/mi
23M
4:34:52
Rank: #26925 (-59)
35K → 23M
17:39 | 14:06/mi
24M
4:48:02
Rank: #26936 (-11)
23M → 24M
13:10 | 13:10/mi
40K· 24.85 mi
4:59:02
Rank: #26903 (+33)
24M → 40K
11:00 | 12:52/mi
25.2M
5:04:19
Rank: #26917 (-14)
40K → 25.2M
5:17 | 15:19/mi
Finish· 26.22 mi
5:16:50
Rank: #26926 (-9)
25.2M → Finish
12:31 | 12:17/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:13:56
Pace10:13 /mi
2nd Half
Distance13.11 mi
Time3:02:54
Pace13:57 /mi
📊Positive Split: 36.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:0326:448:3626:44
8:36
-
10K
6.21 mi11:47:4457:259:1430:41
9:53
+1:17
15K
9.32 mi12:20:091:29:509:3832:25
10:26
+0:33
20K
12.43 mi12:55:392:05:2010:0535:30
11:26
+1:00
Half
13.11 mi13:04:152:13:5610:138:36
12:36
+1:10
25K
15.53 mi13:40:022:49:4310:5635:47
14:46
+2:10
30K
18.64 mi14:24:023:33:4311:2844:00
14:10
-0:36
20M
20.00 mi14:41:523:51:3311:3517:50
13:07
-1:03
21M
21.00 mi14:58:214:08:0211:4916:29
16:29
+3:22
35K
21.75 mi15:07:324:17:1311:509:11
12:17
-4:12
23M
23.00 mi15:25:114:34:5211:5717:39
14:06
+1:49
24M
24.00 mi15:38:214:48:0212:0013:10
13:10
-0:56
40K
24.85 mi15:49:214:59:0212:0211:00
12:52
-0:18
25.2M
25.20 mi15:54:385:04:1912:055:17
15:19
+2:27
Finish
26.22 mi16:07:095:16:5012:0612:31
12:17
-3:02

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

8:36 /mi

Average Pace

12:06 /mi

Slowest Pace

16:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:05:20

40% of race

Time at Steady Pace

1:12:18

23% of race

Time at Slower Pace

1:59:12

38% of race

Average Pace: 12:05 /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 mi11:17:0326:448:3626:44
8:36
#20472
10K
6.21 mi11:47:4457:259:1430:41
9:53
#23343
15K
9.32 mi12:20:091:29:509:3832:25
10:26
#24410
20K
12.43 mi12:55:392:05:2010:0535:30
11:26
#25211
Half
13.11 mi13:04:152:13:5610:138:36
12:36
#25442
25K
15.53 mi13:40:022:49:4310:5635:47
14:46
#26382
30K
18.64 mi14:24:023:33:4311:2844:00
14:10
#26733
20M
20.00 mi14:41:523:51:3311:3517:50
13:07
#26749
21M
21.00 mi14:58:214:08:0211:4916:29
16:29
#26882
35K
21.75 mi15:07:324:17:1311:509:11
12:17
#26866
23M
23.00 mi15:25:114:34:5211:5717:39
14:06
#26925
24M
24.00 mi15:38:214:48:0212:0013:10
13:10
#26936
40K
24.85 mi15:49:214:59:0212:0211:00
12:52
#26903
25.2M
25.20 mi15:54:385:04:1912:055:17
15:19
#26917
Finish
26.22 mi16:07:095:16:5012:0612:31
12:17
#26926
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi204727789778925814(Top 91%)10684(Top 87%)10684(Top 195%)
10K6.21 mi3.10 mi23343-28719340-15519340-155125034(Top 88%)10253(Top 84%)10253(Top 187%)
15K9.32 mi3.11 mi24410-10679911-5719911-57125814(Top 91%)10684(Top 87%)10684(Top 195%)
20K12.43 mi3.11 mi25211-80110354-44310354-44326545(Top 93%)11122(Top 91%)11122(Top 203%)
Half13.11 mi0.68 mi25442-23110481-12710481-12727809(Top 98%)11894(Top 97%)11894(Top 217%)
25K15.53 mi2.42 mi26382-94011003-52211003-52228175(Top 99%)12114(Top 99%)12114(Top 222%)
30K18.64 mi3.11 mi26733-35111249-24611249-24627622(Top 97%)11847(Top 97%)11847(Top 217%)
20M20.00 mi1.36 mi26749-1611260-1111260-1126560(Top 94%)11319(Top 93%)11319(Top 207%)
21M21.00 mi1.00 mi26882-13311345-8511345-8528005(Top 99%)12057(Top 99%)12057(Top 220%)
35K21.75 mi0.75 mi26866+1611338+711338+726207(Top 92%)11199(Top 92%)11199(Top 205%)
23M23.00 mi1.25 mi26925-5911375-3711375-3727395(Top 96%)11803(Top 97%)11803(Top 216%)
24M24.00 mi1.00 mi26936-1111394-1911394-1927015(Top 95%)11642(Top 95%)11642(Top 213%)
40K24.85 mi0.85 mi26903+3311389+511389+526147(Top 92%)11220(Top 92%)11220(Top 205%)
25.2M25.20 mi0.35 mi26917-1411395-611395-627325(Top 96%)11812(Top 97%)11812(Top 216%)
Finish26.22 mi1.02 mi26926-911406-1111406-1127090(Top 95%)11671(Top 95%)11671(Top 213%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 91%
×21stories
+97ft-345ft

Overall

25814

Females

10684

F18-39

10684

5K→10K

3.1 - 6.2 mi

Top 88%
×5stories
+79ft-138ft

Overall

25034

Females

10253

F18-39

10253

10K→15K

6.2 - 9.3 mi

Top 91%
×3stories
+67ft-78ft

Overall

25814

Females

10684

F18-39

10684

15K→20K

9.3 - 12.4 mi

Top 93%
×5stories
+106ft-86ft

Overall

26545

Females

11122

F18-39

11122

20K→Half

12.4 - 13.1 mi

Top 98%
×2stories
+19ft-37ft

Overall

27809

Females

11894

F18-39

11894

Half→25K

13.1 - 15.5 mi

Top 99%
×4stories
+66ft-88ft

Overall

28175

Females

12114

F18-39

12114

25K→30K

15.5 - 18.6 mi

Top 97%
×9stories
+181ft-148ft

Overall

27622

Females

11847

F18-39

11847

30K→20M

18.6 - 20.0 mi

Top 94%
×5stories
+64ft-50ft

Overall

26560

Females

11319

F18-39

11319

20M→21M

20.0 - 21.0 mi

Top 99%
×8stories
+106ft-24ft

Overall

28005

Females

12057

F18-39

12057

21M→35K

21.0 - 21.8 mi

Top 92%
×7stories
+17ft-86ft

Overall

26207

Females

11199

F18-39

11199

35K→23M

21.8 - 23.0 mi

Top 96%
×5stories
+23ft-63ft

Overall

27395

Females

11803

F18-39

11803

23M→24M

23.0 - 24.0 mi

Top 95%
×6stories
+12ft-82ft

Overall

27015

Females

11642

F18-39

11642

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

26147

Females

11220

F18-39

11220

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

27325

Females

11812

F18-39

11812

25.2M→Finish

25.2 - 26.2 mi

Top 95%
×2stories
+22ft-21ft

Overall

27090

Females

11671

F18-39

11671

Passing Analysis

Category:
Athletes Passed
224
Passed By
6678
Net Change
-6454
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20472
5K → 10K72878-2871#20472#23343
10K → 15K221089-1067#23343#24410
15K → 20K19820-801#24410#25211
20K → Half1232-231#25211#25442
Half → 25K3943-940#25442#26382
25K → 30K19370-351#26382#26733
30K → 20M2541-16#26733#26749
20M → 21M3136-133#26749#26882
21M → 35K2812+16#26882#26866
35K → 23M1271-59#26866#26925
23M → 24M2536-11#26925#26936
24M → 40K4310+33#26936#26903
40K → 25.2M519-14#26903#26917
25.2M → Finish1221-9#26917#26926
TOTALS2246678-6454
📊

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