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BOSTON MARATHON 2025

Brenda Zhu

Bib: 22197•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 43%
Division (F50-54)
#0 / 1303
Top 38%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:02
Rank: #21027
Start → 5K
27:02 | 8:42/mi
10K· 6.21 mi
53:06
Rank: #20112 (+915)
5K → 10K
26:04 | 8:23/mi
15K· 9.32 mi
1:19:12
Rank: #19631 (+481)
10K → 15K
26:06 | 8:24/mi
20K· 12.43 mi
1:45:44
Rank: #19323 (+308)
15K → 20K
26:32 | 8:32/mi
Half· 13.11 mi
1:51:22
Rank: #19233 (+90)
20K → Half
5:38 | 8:15/mi
25K· 15.53 mi
2:11:59
Rank: #18874 (+359)
Half → 25K
20:37 | 8:30/mi
30K· 18.64 mi
2:39:31
Rank: #18493 (+381)
25K → 30K
27:32 | 8:52/mi
20M
2:51:36
Rank: #18304 (+189)
30K → 20M
12:05 | 8:54/mi
21M
3:01:17
Rank: #18208 (+96)
20M → 21M
9:41 | 9:41/mi
35K· 21.75 mi
3:07:45
Rank: #18128 (+80)
21M → 35K
6:28 | 8:39/mi
23M
3:19:04
Rank: #18005 (+123)
35K → 23M
11:19 | 9:02/mi
24M
3:27:56
Rank: #17924 (+81)
23M → 24M
8:52 | 8:52/mi
40K· 24.85 mi
3:35:37
Rank: #17854 (+70)
24M → 40K
7:41 | 8:59/mi
25.2M
3:39:03
Rank: #17848 (+6)
40K → 25.2M
3:26 | 9:57/mi
Finish· 26.22 mi
3:48:00
Rank: #17837 (+11)
25.2M → Finish
8:57 | 8:47/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:22
Pace8:30 /mi
2nd Half
Distance13.11 mi
Time1:56:38
Pace8:54 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:1027:028:4227:02
8:42
-
10K
6.21 mi11:50:1453:068:3326:04
8:23
-0:19
15K
9.32 mi12:16:201:19:128:3026:06
8:24
+0:01
20K
12.43 mi12:42:521:45:448:3026:32
8:32
+0:08
Half
13.11 mi12:48:301:51:228:305:38
8:15
-0:17
25K
15.53 mi13:09:072:11:598:3020:37
8:30
+0:15
30K
18.64 mi13:36:392:39:318:3327:32
8:52
+0:22
20M
20.00 mi13:48:442:51:368:3512:05
8:54
+0:02
21M
21.00 mi13:58:253:01:178:389:41
9:41
+0:47
35K
21.75 mi14:04:533:07:458:386:28
8:39
-1:02
23M
23.00 mi14:16:123:19:048:3911:19
9:02
+0:23
24M
24.00 mi14:25:043:27:568:408:52
8:52
-0:10
40K
24.85 mi14:32:453:35:378:417:41
8:59
+0:07
25.2M
25.20 mi14:36:113:39:038:423:26
9:57
+0:58
Finish
26.22 mi14:45:083:48:008:428:57
8:47
-1:10

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

8:15 /mi

Average Pace

8:42 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:57

46% of race

Time at Steady Pace

1:38:37

43% of race

Time at Slower Pace

24:26

11% of race

Average Pace: 8:42 /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 mi11:24:1027:028:4227:02
8:42
#21027
10K
6.21 mi11:50:1453:068:3326:04
8:23
#20112
15K
9.32 mi12:16:201:19:128:3026:06
8:24
#19631
20K
12.43 mi12:42:521:45:448:3026:32
8:32
#19323
Half
13.11 mi12:48:301:51:228:305:38
8:15
#19233
25K
15.53 mi13:09:072:11:598:3020:37
8:30
#18874
30K
18.64 mi13:36:392:39:318:3327:32
8:52
#18493
20M
20.00 mi13:48:442:51:368:3512:05
8:54
#18304
21M
21.00 mi13:58:253:01:178:389:41
9:41
#18208
35K
21.75 mi14:04:533:07:458:386:28
8:39
#18128
23M
23.00 mi14:16:123:19:048:3911:19
9:02
#18005
24M
24.00 mi14:25:043:27:568:408:52
8:52
#17924
40K
24.85 mi14:32:453:35:378:417:41
8:59
#17854
25.2M
25.20 mi14:36:113:39:038:423:26
9:57
#17848
Finish
26.22 mi14:45:083:48:008:428:57
8:47
#17837
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi210278096809618723(Top 66%)6736(Top 55%)6736(Top 517%)
10K6.21 mi3.10 mi20112+9157537+5597537+55919125(Top 67%)6956(Top 57%)6956(Top 534%)
15K9.32 mi3.11 mi19631+4817252+2857252+28518723(Top 66%)6736(Top 55%)6736(Top 517%)
20K12.43 mi3.11 mi19323+3087095+1577095+15718506(Top 65%)6632(Top 54%)6632(Top 509%)
Half13.11 mi0.68 mi19233+907043+527043+5217723(Top 62%)6177(Top 51%)6177(Top 474%)
25K15.53 mi2.42 mi18874+3596842+2016842+20117240(Top 61%)5998(Top 49%)5998(Top 460%)
30K18.64 mi3.11 mi18493+3816657+1856657+18516969(Top 60%)6016(Top 49%)6016(Top 462%)
20M20.00 mi1.36 mi18304+1896585+726585+7216216(Top 57%)5735(Top 47%)5735(Top 440%)
21M21.00 mi1.00 mi18208+966556+296556+2916975(Top 60%)6246(Top 51%)6246(Top 479%)
35K21.75 mi0.75 mi18128+806527+296527+2916384(Top 58%)6004(Top 49%)6004(Top 461%)
23M23.00 mi1.25 mi18005+1236496+316496+3116505(Top 58%)6176(Top 51%)6176(Top 474%)
24M24.00 mi1.00 mi17924+816483+136483+1316691(Top 59%)6316(Top 52%)6316(Top 485%)
40K24.85 mi0.85 mi17854+706466+176466+1716252(Top 57%)6184(Top 51%)6184(Top 475%)
25.2M25.20 mi0.35 mi17848+66473-76473-716878(Top 59%)6532(Top 53%)6532(Top 501%)
Finish26.22 mi1.02 mi17837+116482-96482-917978(Top 63%)7072(Top 58%)7072(Top 543%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21stories
+97ft-345ft

Overall

18723

Females

6736

F50-54

6736

5K→10K

3.1 - 6.2 mi

Top 67%
×5stories
+79ft-138ft

Overall

19125

Females

6956

F50-54

6956

10K→15K

6.2 - 9.3 mi

Top 66%
×3stories
+67ft-78ft

Overall

18723

Females

6736

F50-54

6736

15K→20K

9.3 - 12.4 mi

Top 65%
×5stories
+106ft-86ft

Overall

18506

Females

6632

F50-54

6632

20K→Half

12.4 - 13.1 mi

Top 62%
×2stories
+19ft-37ft

Overall

17723

Females

6177

F50-54

6177

Half→25K

13.1 - 15.5 mi

Top 61%
×4stories
+66ft-88ft

Overall

17240

Females

5998

F50-54

5998

25K→30K

15.5 - 18.6 mi

Top 60%
×9stories
+181ft-148ft

Overall

16969

Females

6016

F50-54

6016

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

16216

Females

5735

F50-54

5735

20M→21M

20.0 - 21.0 mi

Top 60%
×8stories
+106ft-24ft

Overall

16975

Females

6246

F50-54

6246

21M→35K

21.0 - 21.8 mi

Top 58%
×7stories
+17ft-86ft

Overall

16384

Females

6004

F50-54

6004

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16505

Females

6176

F50-54

6176

23M→24M

23.0 - 24.0 mi

Top 59%
×6stories
+12ft-82ft

Overall

16691

Females

6316

F50-54

6316

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16252

Females

6184

F50-54

6184

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

16878

Females

6532

F50-54

6532

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2stories
+22ft-21ft

Overall

17978

Females

7072

F50-54

7072

Passing Analysis

Category:
Athletes Passed
3719
Passed By
529
Net Change
+3190
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21027
5K → 10K97358+915#21027#20112
10K → 15K51433+481#20112#19631
15K → 20K36860+308#19631#19323
20K → Half933+90#19323#19233
Half → 25K37314+359#19233#18874
25K → 30K44968+381#18874#18493
30K → 20M21627+189#18493#18304
20M → 21M14751+96#18304#18208
21M → 35K9414+80#18208#18128
35K → 23M16946+123#18128#18005
23M → 24M11635+81#18005#17924
24M → 40K9424+70#17924#17854
40K → 25.2M3327+6#17854#17848
25.2M → Finish8069+11#17848#17837
TOTALS3719529+3190
📊

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