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BOSTON MARATHON 2026

Xiaomei Zhou

Bib: 21521•F

MA

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 48%
Gender (Female)
#0 / 12578
Top 34%
Masters (Masters Women)
#0 / 6862
Top 18%
Age Group (F45-49)
#0 / 1786
Top 20%
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
24:17
3.11 mi
Rank: #15562
Start → 5K
24:17 | 7:49/mi
10K
48:12
6.21 mi
Rank: #15120 (+442)
5K → 10K
23:55 | 7:42/mi
15K
1:13:02
9.32 mi
Rank: #15726 (-606)
10K → 15K
24:50 | 8:00/mi
20K
1:37:30
12.43 mi
Rank: #15518 (+208)
15K → 20K
24:28 | 7:53/mi
HALF
1:42:48
13.11 mi
Rank: #15501 (+17)
20K → HALF
5:18 | 7:47/mi
25K
2:02:00
15.53 mi
Rank: #15369 (+132)
HALF → 25K
19:12 | 7:56/mi
30K
2:26:29
18.64 mi
Rank: #14833 (+536)
25K → 30K
24:29 | 7:53/mi
20M
2:37:30
20.00 mi
Rank: #14716 (+117)
30K → 20M
11:01 | 8:07/mi
21M
2:45:47
21.00 mi
Rank: #14501 (+215)
20M → 21M
8:17 | 8:17/mi
35K
2:51:37
21.75 mi
Rank: #14433 (+68)
21M → 35K
5:50 | 7:48/mi
23M
3:01:47
23.00 mi
Rank: #14344 (+89)
35K → 23M
10:10 | 8:08/mi
24M
3:09:40
24.00 mi
Rank: #14265 (+79)
23M → 24M
7:53 | 7:53/mi
40K
3:16:19
24.85 mi
Rank: #14123 (+142)
24M → 40K
6:39 | 7:47/mi
25.2M
3:19:10
25.20 mi
Rank: #14068 (+55)
40K → 25.2M
2:51 | 8:16/mi
FINISH
3:26:39
26.22 mi
Rank: #13905 (+163)
25.2M → FINISH
7:29 | 7:21/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:42:48
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:43:51
Pace7:56 /mi
📊Positive Split: 1.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:3024:177:4924:17
7:49
-
10K
6.21 mi11:49:2548:127:4623:55
7:42
-0:07
15K
9.32 mi12:14:151:13:027:5124:50
8:00
+0:18
20K
12.43 mi12:38:431:37:307:5124:28
7:53
-0:07
HALF
13.11 mi12:44:011:42:487:515:18
7:47
-0:06
25K
15.53 mi13:03:132:02:007:5219:12
7:56
+0:09
30K
18.64 mi13:27:422:26:297:5224:29
7:53
-0:03
20M
20.00 mi13:38:432:37:307:5311:01
8:07
+0:14
21M
21.00 mi13:47:002:45:477:548:17
8:17
+0:10
35K
21.75 mi13:52:502:51:377:545:50
7:48
-0:29
23M
23.00 mi14:03:003:01:477:5510:10
8:08
+0:20
24M
24.00 mi14:10:533:09:407:557:53
7:53
-0:15
40K
24.85 mi14:17:323:16:197:546:39
7:47
-0:06
25.2M
25.20 mi14:20:233:19:107:552:51
8:16
+0:29
FINISH
26.22 mi14:27:523:26:397:547:29
7:21
-0:55

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

7:21 /mi

Average Pace

7:53 /mi

Slowest Pace

8:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:54:20

84% of race

Time at Steady Pace

32:19

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:53 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:25:3024:177:4924:17
7:49
#15562
10K
6.21 mi11:49:2548:127:4623:55
7:42
#15120
15K
9.32 mi12:14:151:13:027:5124:50
8:00
#15726
20K
12.43 mi12:38:431:37:307:5124:28
7:53
#15518
HALF
13.11 mi12:44:011:42:487:515:18
7:47
#15501
25K
15.53 mi13:03:132:02:007:5219:12
7:56
#15369
30K
18.64 mi13:27:422:26:297:5224:29
7:53
#14833
20M
20.00 mi13:38:432:37:307:5311:01
8:07
#14716
21M
21.00 mi13:47:002:45:477:548:17
8:17
#14501
35K
21.75 mi13:52:502:51:377:545:50
7:48
#14433
23M
23.00 mi14:03:003:01:477:5510:10
8:08
#14344
24M
24.00 mi14:10:533:09:407:557:53
7:53
#14265
40K
24.85 mi14:17:323:16:197:546:39
7:47
#14123
25.2M
25.20 mi14:20:233:19:107:552:51
8:16
#14068
FINISH
26.22 mi14:27:523:26:397:547:29
7:21
#13905
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi155625035503516966(Top 58%)5894(Top 47%)5894(Top 330%)
10K6.21 mi3.10 mi15120+4424800+2354800+23514738(Top 51%)4531(Top 36%)4531(Top 254%)
15K9.32 mi3.11 mi15726-6065166-3665166-36616966(Top 58%)5894(Top 47%)5894(Top 330%)
20K12.43 mi3.11 mi15518+2085066+1005066+10015130(Top 52%)4867(Top 39%)4867(Top 273%)
HALF13.11 mi0.68 mi15501+175054+125054+1215382(Top 53%)4948(Top 39%)4948(Top 277%)
25K15.53 mi2.42 mi15369+1324990+644990+6414743(Top 51%)4718(Top 38%)4718(Top 264%)
30K18.64 mi3.11 mi14833+5364692+2984692+29812605(Top 43%)3633(Top 29%)3633(Top 203%)
20M20.00 mi1.36 mi14716+1174652+404652+4013627(Top 47%)4302(Top 34%)4302(Top 241%)
21M21.00 mi1.00 mi14501+2154542+1104542+11011776(Top 41%)3415(Top 27%)3415(Top 191%)
35K21.75 mi0.75 mi14433+684519+234519+2313081(Top 45%)4125(Top 33%)4125(Top 231%)
23M23.00 mi1.25 mi14344+894502+174502+1713329(Top 46%)4347(Top 35%)4347(Top 243%)
24M24.00 mi1.00 mi14265+794479+234479+2312948(Top 45%)4229(Top 34%)4229(Top 237%)
40K24.85 mi0.85 mi14123+1424424+554424+5510919(Top 38%)3232(Top 26%)3232(Top 181%)
25.2M25.20 mi0.35 mi14068+554405+194405+1910189(Top 35%)2953(Top 23%)2953(Top 165%)
FINISH26.22 mi1.02 mi13905+1634330+754330+7510263(Top 35%)2985(Top 24%)2985(Top 167%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21
+97ft-345ft

Overall

16966

Females

5894

F45-49

5894

5K→10K

3.1 - 6.2 mi

Top 51%
×5
+79ft-138ft

Overall

14738

Females

4531

F45-49

4531

10K→15K

6.2 - 9.3 mi

Top 58%
×3
+67ft-78ft

Overall

16966

Females

5894

F45-49

5894

15K→20K

9.3 - 12.4 mi

Top 52%
×5
+106ft-86ft

Overall

15130

Females

4867

F45-49

4867

20K→HALF

12.4 - 13.1 mi

Top 53%
×2
+19ft-37ft

Overall

15382

Females

4948

F45-49

4948

HALF→25K

13.1 - 15.5 mi

Top 51%
×4
+66ft-88ft

Overall

14743

Females

4718

F45-49

4718

25K→30K

15.5 - 18.6 mi

Top 43%
×9
+181ft-148ft

Overall

12605

Females

3633

F45-49

3633

30K→20M

18.6 - 20.0 mi

Top 47%
×5
+64ft-50ft

Overall

13627

Females

4302

F45-49

4302

20M→21M

20.0 - 21.0 mi

Top 41%
×8
+106ft-24ft

Overall

11776

Females

3415

F45-49

3415

21M→35K

21.0 - 21.8 mi

Top 45%
×7
+17ft-86ft

Overall

13081

Females

4125

F45-49

4125

35K→23M

21.8 - 23.0 mi

Top 46%
×5
+23ft-63ft

Overall

13329

Females

4347

F45-49

4347

23M→24M

23.0 - 24.0 mi

Top 45%
×6
+12ft-82ft

Overall

12948

Females

4229

F45-49

4229

24M→40K

24.0 - 24.9 mi

Top 38%
×1
+6ft-20ft

Overall

10919

Females

3232

F45-49

3232

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1
+13ft-16ft

Overall

10189

Females

2953

F45-49

2953

25.2M→FINISH

25.2 - 26.2 mi

Top 35%
×2
+22ft-21ft

Overall

10263

Females

2985

F45-49

2985

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2801
Passed By
1144
Net Change
+1657
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15562
5K → 10K561119+442#15562#15120
10K → 15K64670-606#15120#15726
15K → 20K27870+208#15726#15518
20K → HALF4023+17#15518#15501
HALF → 25K19563+132#15501#15369
25K → 30K55115+536#15369#14833
30K → 20M15437+117#14833#14716
20M → 21M22712+215#14716#14501
21M → 35K9628+68#14501#14433
35K → 23M14253+89#14433#14344
23M → 24M11031+79#14344#14265
24M → 40K1519+142#14265#14123
40K → 25.2M594+55#14123#14068
25.2M → FINISH17310+163#14068#13905
TOTALS28011144+1657
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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Export & Support

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing