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BOSTON MARATHON 2023

Xiaohui Zheng

Bib: 13821•M

BC

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
7:35/mi
23:33
↑ 97↓ 3451.5%
10K· 6.21 mi
7:25/mi
46:36
↑ 79↓ 1380.4%
15K· 9.32 mi
7:32/mi
1:10:01
↑ 67↓ 78
20K· 12.43 mi
7:35/mi
1:33:36
↑ 106↓ 860.1%
Half· 13.11 mi
7:30/mi
1:38:43
↑ 19↓ 370.5%
25K· 15.53 mi
7:52/mi
1:57:47
↑ 66↓ 880.2%
30K· 18.64 mi
8:16/mi
2:23:28
↑ 181↓ 1480.2%
20M
8:44/mi
2:35:20
↑ 64↓ 500.2%
21M
9:45/mi
2:45:05
↑ 106↓ 241.6%
35K· 21.75 mi
9:27/mi
2:52:09
↑ 17↓ 861.7%
23M
10:03/mi
3:04:44
↑ 23↓ 630.6%
24M
9:10/mi
3:13:54
↓ 821.3%
40K· 24.85 mi
9:12/mi
3:21:46
↓ 200.3%
25.2M
10:23/mi
3:25:21
↑ 13↓ 160.2%
Finish· 26.22 mi
8:27/mi
3:33:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:43
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time1:55:15
Pace8:47 /mi
📊Positive Split: 16.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:3523:337:3523:33
7:35
-
10K
6.21 mi11:14:3846:367:3023:03
7:25
-0:10
15K
9.32 mi11:38:031:10:017:3123:25
7:32
+0:07
20K
12.43 mi12:01:381:33:367:3223:35
7:35
+0:03
Half
13.11 mi12:06:451:38:437:325:07
7:30
-0:05
25K
15.53 mi12:25:491:57:477:3519:04
7:52
+0:22
30K
18.64 mi12:51:302:23:287:4225:41
8:16
+0:24
20M
20.00 mi13:03:222:35:207:4611:52
8:44
+0:28
21M
21.00 mi13:13:072:45:057:529:45
9:45
+1:01
35K
21.75 mi13:20:112:52:097:557:04
9:27
-0:18
23M
23.00 mi13:32:463:04:448:0212:35
10:03
+0:36
24M
24.00 mi13:41:563:13:548:059:10
9:10
-0:53
40K
24.85 mi13:49:483:21:468:077:52
9:12
+0:02
25.2M
25.20 mi13:53:233:25:218:093:35
10:23
+1:11
Finish
26.22 mi14:02:003:33:588:108:37
8:27
-1:56

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

7:25 /mi

Average Pace

8:10 /mi

Slowest Pace

10:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:47

55% of race

Time at Steady Pace

46:10

22% of race

Time at Slower Pace

50:01

23% of race

Average Pace: 8:10 /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 mi10:51:3523:337:3523:33
7:35
#10349
10K
6.21 mi11:14:3846:367:3023:03
7:25
#10021
15K
9.32 mi11:38:031:10:017:3123:25
7:32
#10169
20K
12.43 mi12:01:381:33:367:3223:35
7:35
#10105
Half
13.11 mi12:06:451:38:437:325:07
7:30
#10103
25K
15.53 mi12:25:491:57:477:3519:04
7:52
#10328
30K
18.64 mi12:51:302:23:287:4225:41
8:16
#10742
20M
20.00 mi13:03:222:35:207:4611:52
8:44
#11070
21M
21.00 mi13:13:072:45:057:529:45
9:45
#11522
35K
21.75 mi13:20:112:52:097:557:04
9:27
#11966
23M
23.00 mi13:32:463:04:448:0212:35
10:03
#12696
24M
24.00 mi13:41:563:13:548:059:10
9:10
#12971
40K
24.85 mi13:49:483:21:468:077:52
9:12
#13141
25.2M
25.20 mi13:53:233:25:218:093:35
10:23
#13237
Finish
26.22 mi14:02:003:33:588:108:37
8:27
#13326
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi103498326832610481(Top 39%)8405(Top 55%)8405(Top 410%)
10K6.21 mi3.10 mi10021+3288161+1658161+1659796(Top 37%)8058(Top 53%)8058(Top 393%)
15K9.32 mi3.11 mi10169-1488264-1038264-10310481(Top 39%)8405(Top 55%)8405(Top 410%)
20K12.43 mi3.11 mi10105+648212+528212+5210017(Top 38%)8085(Top 53%)8085(Top 394%)
Half13.11 mi0.68 mi10103+28207+58207+510235(Top 38%)8247(Top 54%)8247(Top 402%)
25K15.53 mi2.42 mi10328-2258304-978304-9711636(Top 44%)8771(Top 58%)8771(Top 427%)
30K18.64 mi3.11 mi10742-4148455-1518455-15112793(Top 48%)9147(Top 60%)9147(Top 446%)
20M20.00 mi1.36 mi11070-3288580-1258580-12515036(Top 56%)9998(Top 66%)9998(Top 487%)
21M21.00 mi1.00 mi11522-4528763-1838763-18317027(Top 64%)10794(Top 71%)10794(Top 526%)
35K21.75 mi0.75 mi11966-4448949-1868949-18619666(Top 74%)11896(Top 78%)11896(Top 580%)
23M23.00 mi1.25 mi12696-7309233-2849233-28420118(Top 76%)12067(Top 80%)12067(Top 588%)
24M24.00 mi1.00 mi12971-2759323-909323-9017902(Top 67%)11020(Top 73%)11020(Top 537%)
40K24.85 mi0.85 mi13141-1709371-489371-4817077(Top 64%)10605(Top 70%)10605(Top 517%)
25.2M25.20 mi0.35 mi13237-969402-319402-3118702(Top 70%)11330(Top 75%)11330(Top 552%)
Finish26.22 mi1.02 mi13326-899419-179419-1715094(Top 57%)9768(Top 64%)9768(Top 476%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21story building
+97ft-345ft

Overall

10481

Males

8405

M50-54

8405

5K→10K

3.1 - 6.2 mi

Top 37%
×5story building
+79ft-138ft

Overall

9796

Males

8058

M50-54

8058

10K→15K

6.2 - 9.3 mi

Top 39%
×3story building
+67ft-78ft

Overall

10481

Males

8405

M50-54

8405

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10017

Males

8085

M50-54

8085

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10235

Males

8247

M50-54

8247

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

11636

Males

8771

M50-54

8771

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

12793

Males

9147

M50-54

9147

30K→20M

18.6 - 20.0 mi

Top 56%
×5story building
+64ft-50ft

Overall

15036

Males

9998

M50-54

9998

20M→21M

20.0 - 21.0 mi

Top 64%
×8story building
+106ft-24ft

Overall

17027

Males

10794

M50-54

10794

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

19666

Males

11896

M50-54

11896

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

20118

Males

12067

M50-54

12067

23M→24M

23.0 - 24.0 mi

Top 67%
×6story building
+12ft-82ft

Overall

17902

Males

11020

M50-54

11020

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

17077

Males

10605

M50-54

10605

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

18702

Males

11330

M50-54

11330

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2story building
+22ft-21ft

Overall

15094

Males

9768

M50-54

9768

Passing Analysis

Category:
Athletes Passed
1141*
Passed By
4117
Net Change
-2977
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10349
5K → 10K495*167+328#10349#10021
10K → 15K135282-148#10021#10169
15K → 20K187*123+64#10169#10105
20K → Half39*37+2#10105#10103
Half → 25K67292-225#10103#10328
25K → 30K74488-414#10328#10742
30K → 20M24*352-328#10742#11070
20M → 21M16468-452#11070#11522
21M → 35K3447-444#11522#11966
35K → 23M4734-730#11966#12696
23M → 24M20295-275#12696#12971
24M → 40K27197-170#12971#13141
40K → 25.2M23119-96#13141#13237
25.2M → Finish27116-89#13237#13326
TOTALS1141*4117-2977

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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