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BOSTON MARATHON 2023

Mengdi Zhu

Bib: 4117•F

WA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 34%
Gender (Female)
#0 / 11423
Top 14%
Division (F18-39)
#0 / 4884
Top 26%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:50
Rank: #8458
Start → 5K
22:50 | 7:21/mi
10K· 6.21 mi
45:46
Rank: #8938 (-480)
5K → 10K
22:56 | 7:23/mi
15K· 9.32 mi
1:08:38
Rank: #8939 (-1)
10K → 15K
22:52 | 7:22/mi
20K· 12.43 mi
1:32:06
Rank: #9092 (-153)
15K → 20K
23:28 | 7:33/mi
Half· 13.11 mi
1:37:14
Rank: #9146 (-54)
20K → Half
5:08 | 7:31/mi
25K· 15.53 mi
1:55:40
Rank: #9189 (-43)
Half → 25K
18:26 | 7:36/mi
30K· 18.64 mi
2:19:45
Rank: #9136 (+53)
25K → 30K
24:05 | 7:45/mi
20M
2:30:13
Rank: #9033 (+103)
30K → 20M
10:28 | 7:42/mi
21M
2:38:22
Rank: #8969 (+64)
20M → 21M
8:09 | 8:09/mi
35K· 21.75 mi
2:43:54
Rank: #8920 (+49)
21M → 35K
5:32 | 7:24/mi
23M
2:53:38
Rank: #8855 (+65)
35K → 23M
9:44 | 7:46/mi
24M
3:01:13
Rank: #8798 (+57)
23M → 24M
7:35 | 7:35/mi
40K· 24.85 mi
3:08:00
Rank: #8819 (-21)
24M → 40K
6:47 | 7:56/mi
25.2M
3:11:01
Rank: #8826 (-7)
40K → 25.2M
3:01 | 8:45/mi
Finish· 26.22 mi
3:19:24
Rank: #9016 (-190)
25.2M → Finish
8:23 | 8:14/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:14
Pace7:25 /mi
2nd Half
Distance13.11 mi
Time1:42:10
Pace7:48 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:4922:507:2122:50
7:21
-
10K
6.21 mi10:47:4545:467:2222:56
7:23
+0:02
15K
9.32 mi11:10:371:08:387:2222:52
7:22
-0:01
20K
12.43 mi11:34:051:32:067:2523:28
7:33
+0:11
Half
13.11 mi11:39:131:37:147:255:08
7:31
-0:02
25K
15.53 mi11:57:391:55:407:2718:26
7:36
+0:05
30K
18.64 mi12:21:442:19:457:3024:05
7:45
+0:09
20M
20.00 mi12:32:122:30:137:3110:28
7:42
-0:03
21M
21.00 mi12:40:212:38:227:328:09
8:09
+0:27
35K
21.75 mi12:45:532:43:547:325:32
7:24
-0:45
23M
23.00 mi12:55:372:53:387:339:44
7:46
+0:22
24M
24.00 mi13:03:123:01:137:337:35
7:35
-0:11
40K
24.85 mi13:09:593:08:007:346:47
7:56
+0:21
25.2M
25.20 mi13:13:003:11:017:353:01
8:45
+0:49
Finish
26.22 mi13:21:233:19:247:378:23
8:14
-0:31

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

7:21 /mi

Average Pace

7:37 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:59:51

90% of race

Time at Steady Pace

16:32

8% of race

Time at Slower Pace

3:01

2% of race

Average Pace: 7:36 /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 mi10:24:4922:507:2122:50
7:21
#8458
10K
6.21 mi10:47:4545:467:2222:56
7:23
#8938
15K
9.32 mi11:10:371:08:387:2222:52
7:22
#8939
20K
12.43 mi11:34:051:32:067:2523:28
7:33
#9092
Half
13.11 mi11:39:131:37:147:255:08
7:31
#9146
25K
15.53 mi11:57:391:55:407:2718:26
7:36
#9189
30K
18.64 mi12:21:442:19:457:3024:05
7:45
#9136
20M
20.00 mi12:32:122:30:137:3110:28
7:42
#9033
21M
21.00 mi12:40:212:38:227:328:09
8:09
#8969
35K
21.75 mi12:45:532:43:547:325:32
7:24
#8920
23M
23.00 mi12:55:372:53:387:339:44
7:46
#8855
24M
24.00 mi13:03:123:01:137:337:35
7:35
#8798
40K
24.85 mi13:09:593:08:007:346:47
7:56
#8819
25.2M
25.20 mi13:13:003:11:017:353:01
8:45
#8826
Finish
26.22 mi13:21:233:19:247:378:23
8:14
#9016
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8458117511759031(Top 34%)1463(Top 13%)1463(Top 30%)
10K6.21 mi3.10 mi8938-4801388-2131388-2139463(Top 36%)1610(Top 14%)1610(Top 33%)
15K9.32 mi3.11 mi8939-11406-181406-189031(Top 34%)1463(Top 13%)1463(Top 30%)
20K12.43 mi3.11 mi9092-1531475-691475-699734(Top 37%)1797(Top 16%)1797(Top 37%)
Half13.11 mi0.68 mi9146-541494-191494-1910435(Top 39%)2090(Top 18%)2090(Top 43%)
25K15.53 mi2.42 mi9189-431521-271521-279573(Top 36%)1811(Top 16%)1811(Top 37%)
30K18.64 mi3.11 mi9136+531540-191540-199007(Top 34%)1710(Top 15%)1710(Top 35%)
20M20.00 mi1.36 mi9033+1031520+201520+208232(Top 31%)1491(Top 13%)1491(Top 31%)
21M21.00 mi1.00 mi8969+641521-11521-18328(Top 31%)1654(Top 14%)1654(Top 34%)
35K21.75 mi0.75 mi8920+491505+161505+167821(Top 29%)1429(Top 13%)1429(Top 29%)
23M23.00 mi1.25 mi8855+651512-71512-78255(Top 31%)1693(Top 15%)1693(Top 35%)
24M24.00 mi1.00 mi8798+571516-41516-48308(Top 31%)1800(Top 16%)1800(Top 37%)
40K24.85 mi0.85 mi8819-211548-321548-329608(Top 36%)2453(Top 21%)2453(Top 50%)
25.2M25.20 mi0.35 mi8826-71560-121560-1211031(Top 41%)3189(Top 28%)3189(Top 65%)
Finish26.22 mi1.02 mi9016-1901655-951655-9513620(Top 51%)4526(Top 40%)4526(Top 93%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21stories
+97ft-345ft

Overall

9031

Females

1463

F18-39

1463

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

9463

Females

1610

F18-39

1610

10K→15K

6.2 - 9.3 mi

Top 34%
×3stories
+67ft-78ft

Overall

9031

Females

1463

F18-39

1463

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

9734

Females

1797

F18-39

1797

20K→Half

12.4 - 13.1 mi

Top 39%
×2stories
+19ft-37ft

Overall

10435

Females

2090

F18-39

2090

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

9573

Females

1811

F18-39

1811

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

9007

Females

1710

F18-39

1710

30K→20M

18.6 - 20.0 mi

Top 31%
×5stories
+64ft-50ft

Overall

8232

Females

1491

F18-39

1491

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8328

Females

1654

F18-39

1654

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

7821

Females

1429

F18-39

1429

35K→23M

21.8 - 23.0 mi

Top 31%
×5stories
+23ft-63ft

Overall

8255

Females

1693

F18-39

1693

23M→24M

23.0 - 24.0 mi

Top 31%
×6stories
+12ft-82ft

Overall

8308

Females

1800

F18-39

1800

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9608

Females

2453

F18-39

2453

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

11031

Females

3189

F18-39

3189

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

13620

Females

4526

F18-39

4526

Passing Analysis

Category:
Athletes Passed
1218
Passed By
1776
Net Change
-558
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8458
5K → 10K97577-480#8458#8938
10K → 15K144145-1#8938#8939
15K → 20K79232-153#8939#9092
20K → Half862-54#9092#9146
Half → 25K106149-43#9146#9189
25K → 30K191138+53#9189#9136
30K → 20M13431+103#9136#9033
20M → 21M10844+64#9033#8969
21M → 35K6415+49#8969#8920
35K → 23M10742+65#8920#8855
23M → 24M9033+57#8855#8798
24M → 40K4869-21#8798#8819
40K → 25.2M2936-7#8819#8826
25.2M → Finish13203-190#8826#9016
TOTALS12181776-558
📊

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