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BOSTON MARATHON 2023

Zhaolong Zhong

Bib: 1103•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 3%
Gender (Male)
#0 / 15176
Top 5%
Division (M18-39)
#0 / 5285
Top 13%
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
5:59/mi
18:35
↑ 97↓ 3451.5%
10K· 6.21 mi
5:51/mi
36:46
↑ 79↓ 1380.4%
15K· 9.32 mi
5:59/mi
55:21
↑ 67↓ 78
20K· 12.43 mi
6:08/mi
1:14:25
↑ 106↓ 860.1%
Half· 13.11 mi
5:59/mi
1:18:30
↑ 19↓ 370.5%
25K· 15.53 mi
6:06/mi
1:33:18
↑ 66↓ 880.2%
30K· 18.64 mi
6:19/mi
1:52:57
↑ 181↓ 1480.2%
20M
6:22/mi
2:01:36
↑ 64↓ 500.2%
21M
6:56/mi
2:08:32
↑ 106↓ 241.6%
35K· 21.75 mi
6:21/mi
2:13:17
↑ 17↓ 861.7%
23M
6:43/mi
2:21:41
↑ 23↓ 630.6%
24M
6:21/mi
2:28:02
↓ 821.3%
40K· 24.85 mi
6:33/mi
2:33:38
↓ 200.3%
25.2M
7:09/mi
2:36:06
↑ 13↓ 160.2%
Finish· 26.22 mi
6:34/mi
2:42:48
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:18:30
Pace5:59 /mi
2nd Half
Distance13.11 mi
Time1:24:18
Pace6:26 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:1618:355:5918:35
5:59
-
10K
6.21 mi10:37:2736:465:5518:11
5:51
-0:08
15K
9.32 mi10:56:0255:215:5618:35
5:59
+0:08
20K
12.43 mi11:15:061:14:255:5919:04
6:08
+0:09
Half
13.11 mi11:19:111:18:305:594:05
5:59
-0:09
25K
15.53 mi11:33:591:33:186:0014:48
6:06
+0:07
30K
18.64 mi11:53:381:52:576:0419:39
6:19
+0:13
20M
20.00 mi12:02:172:01:366:058:39
6:22
+0:03
21M
21.00 mi12:09:132:08:326:076:56
6:56
+0:34
35K
21.75 mi12:13:582:13:176:084:45
6:21
-0:35
23M
23.00 mi12:22:222:21:416:108:24
6:43
+0:22
24M
24.00 mi12:28:432:28:026:106:21
6:21
-0:22
40K
24.85 mi12:34:192:33:386:115:36
6:33
+0:12
25.2M
25.20 mi12:36:472:36:066:122:28
7:09
+0:36
Finish
26.22 mi12:43:292:42:486:136:42
6:34
-0:35

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

5:51 /mi

Average Pace

6:13 /mi

Slowest Pace

7:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:18

57% of race

Time at Steady Pace

39:24

24% of race

Time at Slower Pace

30:06

18% of race

Average Pace: 6:13 /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 mi10:19:1618:355:5918:35
5:59
#658
10K
6.21 mi10:37:2736:465:5518:11
5:51
#585
15K
9.32 mi10:56:0255:215:5618:35
5:59
#600
20K
12.43 mi11:15:061:14:255:5919:04
6:08
#648
Half
13.11 mi11:19:111:18:305:594:05
5:59
#646
25K
15.53 mi11:33:591:33:186:0014:48
6:06
#654
30K
18.64 mi11:53:381:52:576:0419:39
6:19
#693
20M
20.00 mi12:02:172:01:366:058:39
6:22
#704
21M
21.00 mi12:09:132:08:326:076:56
6:56
#733
35K
21.75 mi12:13:582:13:176:084:45
6:21
#761
23M
23.00 mi12:22:222:21:416:108:24
6:43
#787
24M
24.00 mi12:28:432:28:026:106:21
6:21
#797
40K
24.85 mi12:34:192:33:386:115:36
6:33
#804
25.2M
25.20 mi12:36:472:36:066:122:28
7:09
#804
Finish
26.22 mi12:43:292:42:486:136:42
6:34
#839
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi658614614667(Top 3%)624(Top 4%)624(Top 12%)
10K6.21 mi3.10 mi585+73543+71543+71507(Top 2%)466(Top 3%)466(Top 9%)
15K9.32 mi3.11 mi600-15557-14557-14667(Top 3%)624(Top 4%)624(Top 12%)
20K12.43 mi3.11 mi648-48605-48605-48881(Top 3%)836(Top 6%)836(Top 16%)
Half13.11 mi0.68 mi646+2603+2603+2727(Top 3%)686(Top 5%)686(Top 13%)
25K15.53 mi2.42 mi654-8613-10613-10759(Top 3%)718(Top 5%)718(Top 14%)
30K18.64 mi3.11 mi693-39651-38651-38972(Top 4%)924(Top 6%)924(Top 17%)
20M20.00 mi1.36 mi704-11662-11662-111027(Top 4%)983(Top 6%)983(Top 19%)
21M21.00 mi1.00 mi733-29691-29691-291857(Top 7%)1763(Top 12%)1763(Top 33%)
35K21.75 mi0.75 mi761-28718-27718-271709(Top 6%)1622(Top 11%)1622(Top 31%)
23M23.00 mi1.25 mi787-26743-25743-252195(Top 8%)2068(Top 14%)2068(Top 39%)
24M24.00 mi1.00 mi797-10753-10753-101482(Top 6%)1401(Top 9%)1401(Top 27%)
40K24.85 mi0.85 mi804-7759-6759-61707(Top 6%)1605(Top 11%)1605(Top 30%)
25.2M25.20 mi0.35 mi804760-1760-12224(Top 8%)2057(Top 14%)2057(Top 39%)
Finish26.22 mi1.02 mi839-35794-34794-342819(Top 11%)2556(Top 17%)2556(Top 48%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21story building
+97ft-345ft

Overall

667

Males

624

M18-39

624

5K→10K

3.1 - 6.2 mi

Top 2%
×5story building
+79ft-138ft

Overall

507

Males

466

M18-39

466

10K→15K

6.2 - 9.3 mi

Top 3%
×3story building
+67ft-78ft

Overall

667

Males

624

M18-39

624

15K→20K

9.3 - 12.4 mi

Top 3%
×5story building
+106ft-86ft

Overall

881

Males

836

M18-39

836

20K→Half

12.4 - 13.1 mi

Top 3%
×2story building
+19ft-37ft

Overall

727

Males

686

M18-39

686

Half→25K

13.1 - 15.5 mi

Top 3%
×4story building
+66ft-88ft

Overall

759

Males

718

M18-39

718

25K→30K

15.5 - 18.6 mi

Top 4%
×9story building
+181ft-148ft

Overall

972

Males

924

M18-39

924

30K→20M

18.6 - 20.0 mi

Top 4%
×5story building
+64ft-50ft

Overall

1027

Males

983

M18-39

983

20M→21M

20.0 - 21.0 mi

Top 7%
×8story building
+106ft-24ft

Overall

1857

Males

1763

M18-39

1763

21M→35K

21.0 - 21.8 mi

Top 6%
×7story building
+17ft-86ft

Overall

1709

Males

1622

M18-39

1622

35K→23M

21.8 - 23.0 mi

Top 8%
×5story building
+23ft-63ft

Overall

2195

Males

2068

M18-39

2068

23M→24M

23.0 - 24.0 mi

Top 6%
×6story building
+12ft-82ft

Overall

1482

Males

1401

M18-39

1401

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1707

Males

1605

M18-39

1605

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2224

Males

2057

M18-39

2057

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2story building
+22ft-21ft

Overall

2819

Males

2556

M18-39

2556

Passing Analysis

Category:
Athletes Passed
176
Passed By
357
Net Change
-181
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#658
5K → 10K818+73#658#585
10K → 15K1227-15#585#600
15K → 20K452-48#600#648
20K → Half53+2#648#646
Half → 25K1119-8#646#654
25K → 30K1251-39#654#693
30K → 20M617-11#693#704
20M → 21M635-29#704#733
21M → 35K533-28#733#761
35K → 23M430-26#761#787
23M → 24M818-10#787#797
24M → 40K815-7#797#804
40K → 25.2M660#804#804
25.2M → Finish843-35#804#839
TOTALS176357-181
📊

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