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BOSTON MARATHON 2023

John Su

Bib: 9032•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 34%
Gender (Male)
#0 / 15176
Top 49%
Masters (Masters Men)
#0 / 9891
Top 37%
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:46
Rank: #13791
Start → 5K
24:46 | 7:58/mi
10K· 6.21 mi
49:13
Rank: #13737 (+54)
5K → 10K
24:27 | 7:52/mi
15K· 9.32 mi
1:13:45
Rank: #13671 (+66)
10K → 15K
24:32 | 7:54/mi
20K· 12.43 mi
1:39:24
Rank: #14088 (-417)
15K → 20K
25:39 | 8:15/mi
Half· 13.11 mi
1:44:48
Rank: #14067 (+21)
20K → Half
5:24 | 7:55/mi
25K· 15.53 mi
2:03:56
Rank: #13695 (+372)
Half → 25K
19:08 | 7:53/mi
30K· 18.64 mi
2:27:38
Rank: #12632 (+1063)
25K → 30K
23:42 | 7:38/mi
20M
2:37:55
Rank: #12182 (+450)
30K → 20M
10:17 | 7:34/mi
21M
2:45:20
Rank: #11628 (+554)
20M → 21M
7:25 | 7:25/mi
35K· 21.75 mi
2:50:14
Rank: #11204 (+424)
21M → 35K
4:54 | 6:33/mi
23M
2:58:43
Rank: #10561 (+643)
35K → 23M
8:29 | 6:47/mi
24M
3:05:12
Rank: #10077 (+484)
23M → 24M
6:29 | 6:29/mi
40K· 24.85 mi
3:10:59
Rank: #9695 (+382)
24M → 40K
5:47 | 6:46/mi
25.2M
3:13:24
Rank: #9511 (+184)
40K → 25.2M
2:25 | 7:00/mi
Finish· 26.22 mi
3:19:50
Rank: #9143 (+368)
25.2M → Finish
6:26 | 6:19/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:44:48
Pace8:00 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:35:02
Pace7:15 /mi
📊Negative Split: 9.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:1624:467:5824:46
7:58
-
10K
6.21 mi11:39:4349:137:5524:27
7:52
-0:06
15K
9.32 mi12:04:151:13:457:5524:32
7:54
+0:02
20K
12.43 mi12:29:541:39:248:0025:39
8:15
+0:21
Half
13.11 mi12:35:181:44:488:005:24
7:55
-0:20
25K
15.53 mi12:54:262:03:567:5919:08
7:53
-0:02
30K
18.64 mi13:18:082:27:387:5523:42
7:38
-0:15
20M
20.00 mi13:28:252:37:557:5410:17
7:34
-0:04
21M
21.00 mi13:35:502:45:207:527:25
7:25
-0:09
35K
21.75 mi13:40:442:50:147:504:54
6:33
-0:52
23M
23.00 mi13:49:132:58:437:468:29
6:47
+0:14
24M
24.00 mi13:55:423:05:127:436:29
6:29
-0:18
40K
24.85 mi14:01:293:10:597:415:47
6:46
+0:17
25.2M
25.20 mi14:03:543:13:247:402:25
7:00
+0:14
Finish
26.22 mi14:10:203:19:507:386:26
6:19
-0:41

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

6:19 /mi

Average Pace

7:38 /mi

Slowest Pace

8:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

34:30

17% of race

Time at Steady Pace

1:05:51

33% of race

Time at Slower Pace

1:39:29

50% of race

Average Pace: 7:37 /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 mi11:15:1624:467:5824:46
7:58
#13791
10K
6.21 mi11:39:4349:137:5524:27
7:52
#13737
15K
9.32 mi12:04:151:13:457:5524:32
7:54
#13671
20K
12.43 mi12:29:541:39:248:0025:39
8:15
#14088
Half
13.11 mi12:35:181:44:488:005:24
7:55
#14067
25K
15.53 mi12:54:262:03:567:5919:08
7:53
#13695
30K
18.64 mi13:18:082:27:387:5523:42
7:38
#12632
20M
20.00 mi13:28:252:37:557:5410:17
7:34
#12182
21M
21.00 mi13:35:502:45:207:527:25
7:25
#11628
35K
21.75 mi13:40:442:50:147:504:54
6:33
#11204
23M
23.00 mi13:49:132:58:437:468:29
6:47
#10561
24M
24.00 mi13:55:423:05:127:436:29
6:29
#10077
40K
24.85 mi14:01:293:10:597:415:47
6:46
#9695
25.2M
25.20 mi14:03:543:13:247:402:25
7:00
#9511
Finish
26.22 mi14:10:203:19:507:386:26
6:19
#9143
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi137919872987213477(Top 51%)9690(Top 64%)9690(Top 430%)
10K6.21 mi3.10 mi13737+549825+479825+4713708(Top 51%)9823(Top 65%)9823(Top 436%)
15K9.32 mi3.11 mi13671+669787+389787+3813477(Top 51%)9690(Top 64%)9690(Top 430%)
20K12.43 mi3.11 mi14088-4179931-1449931-14415299(Top 57%)10380(Top 68%)10380(Top 461%)
Half13.11 mi0.68 mi14067+219927+49927+413600(Top 51%)9710(Top 64%)9710(Top 431%)
25K15.53 mi2.42 mi13695+3729753+1749753+17411831(Top 44%)8831(Top 58%)8831(Top 392%)
30K18.64 mi3.11 mi12632+10639278+4759278+4758149(Top 31%)6776(Top 45%)6776(Top 301%)
20M20.00 mi1.36 mi12182+4509070+2089070+2087288(Top 27%)6153(Top 41%)6153(Top 273%)
21M21.00 mi1.00 mi11628+5548805+2658805+2654223(Top 16%)3875(Top 26%)3875(Top 172%)
35K21.75 mi0.75 mi11204+4248612+1938612+1932748(Top 10%)2591(Top 17%)2591(Top 115%)
23M23.00 mi1.25 mi10561+6438262+3508262+3502547(Top 10%)2393(Top 16%)2393(Top 106%)
24M24.00 mi1.00 mi10077+4847997+2657997+2652056(Top 8%)1931(Top 13%)1931(Top 86%)
40K24.85 mi0.85 mi9695+3827773+2247773+2242688(Top 10%)2487(Top 16%)2487(Top 110%)
25.2M25.20 mi0.35 mi9511+1847656+1177656+1171833(Top 7%)1726(Top 11%)1726(Top 77%)
Finish26.22 mi1.02 mi9143+3687420+2367420+2361700(Top 6%)1600(Top 11%)1600(Top 71%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

13477

Males

9690

M45-49

9690

5K→10K

3.1 - 6.2 mi

Top 51%
×5stories
+79ft-138ft

Overall

13708

Males

9823

M45-49

9823

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

13477

Males

9690

M45-49

9690

15K→20K

9.3 - 12.4 mi

Top 57%
×5stories
+106ft-86ft

Overall

15299

Males

10380

M45-49

10380

20K→Half

12.4 - 13.1 mi

Top 51%
×2stories
+19ft-37ft

Overall

13600

Males

9710

M45-49

9710

Half→25K

13.1 - 15.5 mi

Top 44%
×4stories
+66ft-88ft

Overall

11831

Males

8831

M45-49

8831

25K→30K

15.5 - 18.6 mi

Top 31%
×9stories
+181ft-148ft

Overall

8149

Males

6776

M45-49

6776

30K→20M

18.6 - 20.0 mi

Top 27%
×5stories
+64ft-50ft

Overall

7288

Males

6153

M45-49

6153

20M→21M

20.0 - 21.0 mi

Top 16%
×8stories
+106ft-24ft

Overall

4223

Males

3875

M45-49

3875

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2748

Males

2591

M45-49

2591

35K→23M

21.8 - 23.0 mi

Top 10%
×5stories
+23ft-63ft

Overall

2547

Males

2393

M45-49

2393

23M→24M

23.0 - 24.0 mi

Top 8%
×6stories
+12ft-82ft

Overall

2056

Males

1931

M45-49

1931

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2688

Males

2487

M45-49

2487

40K→25.2M

24.9 - 25.2 mi

Top 7%
×1story
+13ft-16ft

Overall

1833

Males

1726

M45-49

1726

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2stories
+22ft-21ft

Overall

1700

Males

1600

M45-49

1600

Passing Analysis

Category:
Athletes Passed
5603*
Passed By
955
Net Change
+4648
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13791
5K → 10K324270+54#13791#13737
10K → 15K215149+66#13737#13671
15K → 20K81498-417#13671#14088
20K → Half4827+21#14088#14067
Half → 25K38210+372#14067#13695
25K → 30K10630+1063#13695#12632
30K → 20M4511+450#12632#12182
20M → 21M5540+554#12182#11628
21M → 35K4240+424#11628#11204
35K → 23M6430+643#11204#10561
23M → 24M4840+484#10561#10077
24M → 40K382*0+382#10077#9695
40K → 25.2M1840+184#9695#9511
25.2M → Finish3680+368#9511#9143
TOTALS5603*955+4648

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

📊

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