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BOSTON MARATHON 2023

David Simons

Bib: 3853•M

NC

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 5%
Gender (Male)
#0 / 15176
Top 8%
Division (M18-39)
#0 / 5285
Top 19%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:57
Rank: #1893
Start → 5K
19:57 | 6:25/mi
10K· 6.21 mi
39:31
Rank: #1807 (+86)
5K → 10K
19:34 | 6:18/mi
15K· 9.32 mi
59:17
Rank: #1831 (-24)
10K → 15K
19:46 | 6:22/mi
20K· 12.43 mi
1:19:06
Rank: #1775 (+56)
15K → 20K
19:49 | 6:23/mi
Half· 13.11 mi
1:23:19
Rank: #1758 (+17)
20K → Half
4:13 | 6:11/mi
25K· 15.53 mi
1:38:34
Rank: #1677 (+81)
Half → 25K
15:15 | 6:17/mi
30K· 18.64 mi
1:58:20
Rank: #1532 (+145)
25K → 30K
19:46 | 6:22/mi
20M
2:07:07
Rank: #1505 (+27)
30K → 20M
8:47 | 6:28/mi
21M
2:13:49
Rank: #1465 (+40)
20M → 21M
6:42 | 6:42/mi
35K· 21.75 mi
2:18:27
Rank: #1446 (+19)
21M → 35K
4:38 | 6:12/mi
23M
2:26:21
Rank: #1383 (+63)
35K → 23M
7:54 | 6:19/mi
24M
2:32:32
Rank: #1339 (+44)
23M → 24M
6:11 | 6:11/mi
40K· 24.85 mi
2:38:01
Rank: #1319 (+20)
24M → 40K
5:29 | 6:25/mi
25.2M
2:40:19
Rank: #1304 (+15)
40K → 25.2M
2:18 | 6:40/mi
Finish· 26.22 mi
2:46:39
Rank: #1275 (+29)
25.2M → Finish
6:20 | 6:13/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:23:19
Pace6:21 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:23:20
Pace6:21 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:3119:576:2519:57
6:25
-
10K
6.21 mi10:41:0539:316:2219:34
6:18
-0:07
15K
9.32 mi11:00:5159:176:2219:46
6:22
+0:04
20K
12.43 mi11:20:401:19:066:2219:49
6:23
+0:01
Half
13.11 mi11:24:531:23:196:214:13
6:11
-0:12
25K
15.53 mi11:40:081:38:346:2115:15
6:17
+0:06
30K
18.64 mi11:59:541:58:206:2119:46
6:22
+0:05
20M
20.00 mi12:08:412:07:076:218:47
6:28
+0:06
21M
21.00 mi12:15:232:13:496:226:42
6:42
+0:14
35K
21.75 mi12:20:012:18:276:224:38
6:12
-0:30
23M
23.00 mi12:27:552:26:216:227:54
6:19
+0:07
24M
24.00 mi12:34:062:32:326:216:11
6:11
-0:08
40K
24.85 mi12:39:352:38:016:215:29
6:25
+0:14
25.2M
25.20 mi12:41:532:40:196:222:18
6:40
+0:15
Finish
26.22 mi12:48:132:46:396:226:20
6:13
-0:27

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

6:11 /mi

Average Pace

6:22 /mi

Slowest Pace

6:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:37:39

95% of race

Time at Steady Pace

9:00

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:21 /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 mi10:21:3119:576:2519:57
6:25
#1893
10K
6.21 mi10:41:0539:316:2219:34
6:18
#1807
15K
9.32 mi11:00:5159:176:2219:46
6:22
#1831
20K
12.43 mi11:20:401:19:066:2219:49
6:23
#1775
Half
13.11 mi11:24:531:23:196:214:13
6:11
#1758
25K
15.53 mi11:40:081:38:346:2115:15
6:17
#1677
30K
18.64 mi11:59:541:58:206:2119:46
6:22
#1532
20M
20.00 mi12:08:412:07:076:218:47
6:28
#1505
21M
21.00 mi12:15:232:13:496:226:42
6:42
#1465
35K
21.75 mi12:20:012:18:276:224:38
6:12
#1446
23M
23.00 mi12:27:552:26:216:227:54
6:19
#1383
24M
24.00 mi12:34:062:32:326:216:11
6:11
#1339
40K
24.85 mi12:39:352:38:016:215:29
6:25
#1319
25.2M
25.20 mi12:41:532:40:196:222:18
6:40
#1304
Finish
26.22 mi12:48:132:46:396:226:20
6:13
#1275
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1893180418041917(Top 7%)1835(Top 12%)1835(Top 35%)
10K6.21 mi3.10 mi1807+861728+761728+761762(Top 7%)1685(Top 11%)1685(Top 32%)
15K9.32 mi3.11 mi1831-241751-231751-231917(Top 7%)1835(Top 12%)1835(Top 35%)
20K12.43 mi3.11 mi1775+561698+531698+531700(Top 6%)1626(Top 11%)1626(Top 31%)
Half13.11 mi0.68 mi1758+171681+171681+171286(Top 5%)1234(Top 8%)1234(Top 23%)
25K15.53 mi2.42 mi1677+811605+761605+761297(Top 5%)1240(Top 8%)1240(Top 23%)
30K18.64 mi3.11 mi1532+1451464+1411464+1411106(Top 4%)1053(Top 7%)1053(Top 20%)
20M20.00 mi1.36 mi1505+271438+261438+261310(Top 5%)1249(Top 8%)1249(Top 24%)
21M21.00 mi1.00 mi1465+401400+381400+381095(Top 4%)1041(Top 7%)1041(Top 20%)
35K21.75 mi0.75 mi1446+191381+191381+191221(Top 5%)1164(Top 8%)1164(Top 22%)
23M23.00 mi1.25 mi1383+631319+621319+62866(Top 3%)822(Top 5%)822(Top 16%)
24M24.00 mi1.00 mi1339+441276+431276+43977(Top 4%)926(Top 6%)926(Top 18%)
40K24.85 mi0.85 mi1319+201257+191257+191237(Top 5%)1165(Top 8%)1165(Top 22%)
25.2M25.20 mi0.35 mi1304+151243+141243+14836(Top 3%)797(Top 5%)797(Top 15%)
Finish26.22 mi1.02 mi1275+291216+271216+271318(Top 5%)1248(Top 8%)1248(Top 24%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 7%
×21stories
+97ft-345ft

Overall

1917

Males

1835

M18-39

1835

5K→10K

3.1 - 6.2 mi

Top 7%
×5stories
+79ft-138ft

Overall

1762

Males

1685

M18-39

1685

10K→15K

6.2 - 9.3 mi

Top 7%
×3stories
+67ft-78ft

Overall

1917

Males

1835

M18-39

1835

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1700

Males

1626

M18-39

1626

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1286

Males

1234

M18-39

1234

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1297

Males

1240

M18-39

1240

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

1106

Males

1053

M18-39

1053

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1310

Males

1249

M18-39

1249

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

1095

Males

1041

M18-39

1041

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1221

Males

1164

M18-39

1164

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

866

Males

822

M18-39

822

23M→24M

23.0 - 24.0 mi

Top 4%
×6stories
+12ft-82ft

Overall

977

Males

926

M18-39

926

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1237

Males

1165

M18-39

1165

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

836

Males

797

M18-39

797

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1318

Males

1248

M18-39

1248

Passing Analysis

Category:
Athletes Passed
835
Passed By
217
Net Change
+618
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1893
5K → 10K14357+86#1893#1807
10K → 15K4872-24#1807#1831
15K → 20K8226+56#1831#1775
20K → Half192+17#1775#1758
Half → 25K854+81#1758#1677
25K → 30K1494+145#1677#1532
30K → 20M4316+27#1532#1505
20M → 21M455+40#1505#1465
21M → 35K278+19#1465#1446
35K → 23M641+63#1446#1383
23M → 24M484+44#1383#1339
24M → 40K277+20#1339#1319
40K → 25.2M172+15#1319#1304
25.2M → Finish389+29#1304#1275
TOTALS835217+618
📊

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