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BOSTON MARATHON 2023

Gavin Lau

Bib: 1586•M

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 4%
Gender (Male)
#0 / 15176
Top 8%
Division (M18-39)
#0 / 5285
Top 18%
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
6:19/mi
19:36
↑ 97↓ 3451.5%
10K· 6.21 mi
6:18/mi
39:11
↑ 79↓ 1380.4%
15K· 9.32 mi
6:20/mi
58:52
↑ 67↓ 78
20K· 12.43 mi
6:21/mi
1:18:36
↑ 106↓ 860.1%
Half· 13.11 mi
6:17/mi
1:22:53
↑ 19↓ 370.5%
25K· 15.53 mi
6:22/mi
1:38:18
↑ 66↓ 880.2%
30K· 18.64 mi
6:22/mi
1:58:05
↑ 181↓ 1480.2%
20M
6:27/mi
2:06:51
↑ 64↓ 500.2%
21M
6:36/mi
2:13:27
↑ 106↓ 241.6%
35K· 21.75 mi
5:52/mi
2:17:50
↑ 17↓ 861.7%
23M
6:20/mi
2:25:46
↑ 23↓ 630.6%
24M
6:05/mi
2:31:51
↓ 821.3%
40K· 24.85 mi
6:18/mi
2:37:14
↓ 200.3%
25.2M
6:49/mi
2:39:35
↑ 13↓ 160.2%
Finish· 26.22 mi
6:15/mi
2:45:57
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:22:53
Pace6:19 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:23:04
Pace6:20 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:5519:366:1919:36
6:19
-
10K
6.21 mi10:39:3039:116:1819:35
6:18
-0:01
15K
9.32 mi10:59:1158:526:1919:41
6:20
+0:02
20K
12.43 mi11:18:551:18:366:1919:44
6:21
+0:01
Half
13.11 mi11:23:121:22:536:194:17
6:17
-0:04
25K
15.53 mi11:38:371:38:186:2015:25
6:22
+0:05
30K
18.64 mi11:58:241:58:056:2019:47
6:22
0:00
20M
20.00 mi12:07:102:06:516:218:46
6:27
+0:05
21M
21.00 mi12:13:462:13:276:216:36
6:36
+0:09
35K
21.75 mi12:18:092:17:506:204:23
5:52
-0:44
23M
23.00 mi12:26:052:25:466:207:56
6:20
+0:28
24M
24.00 mi12:32:102:31:516:206:05
6:05
-0:15
40K
24.85 mi12:37:332:37:146:205:23
6:18
+0:13
25.2M
25.20 mi12:39:542:39:356:202:21
6:49
+0:31
Finish
26.22 mi12:46:162:45:576:206:22
6:15
-0:34

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

5:52 /mi

Average Pace

6:20 /mi

Slowest Pace

6:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:37:00

95% of race

Time at Steady Pace

8:57

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:20 /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 mi10:19:5519:366:1919:36
6:19
#1464
10K
6.21 mi10:39:3039:116:1819:35
6:18
#1587
15K
9.32 mi10:59:1158:526:1919:41
6:20
#1655
20K
12.43 mi11:18:551:18:366:1919:44
6:21
#1631
Half
13.11 mi11:23:121:22:536:194:17
6:17
#1630
25K
15.53 mi11:38:371:38:186:2015:25
6:22
#1595
30K
18.64 mi11:58:241:58:056:2019:47
6:22
#1478
20M
20.00 mi12:07:102:06:516:218:46
6:27
#1453
21M
21.00 mi12:13:462:13:276:216:36
6:36
#1396
35K
21.75 mi12:18:092:17:506:204:23
5:52
#1337
23M
23.00 mi12:26:052:25:466:207:56
6:20
#1287
24M
24.00 mi12:32:102:31:516:206:05
6:05
#1233
40K
24.85 mi12:37:332:37:146:205:23
6:18
#1202
25.2M
25.20 mi12:39:542:39:356:202:21
6:49
#1202
Finish
26.22 mi12:46:162:45:576:206:22
6:15
#1196
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1464139313931799(Top 7%)1722(Top 11%)1722(Top 33%)
10K6.21 mi3.10 mi1587-1231514-1211514-1211781(Top 7%)1703(Top 11%)1703(Top 32%)
15K9.32 mi3.11 mi1655-681582-681582-681799(Top 7%)1722(Top 11%)1722(Top 33%)
20K12.43 mi3.11 mi1631+241560+221560+221597(Top 6%)1527(Top 10%)1527(Top 29%)
Half13.11 mi0.68 mi1630+11559+11559+11661(Top 6%)1591(Top 10%)1591(Top 30%)
25K15.53 mi2.42 mi1595+351527+321527+321548(Top 6%)1483(Top 10%)1483(Top 28%)
30K18.64 mi3.11 mi1478+1171412+1151412+1151122(Top 4%)1069(Top 7%)1069(Top 20%)
20M20.00 mi1.36 mi1453+251389+231389+231277(Top 5%)1216(Top 8%)1216(Top 23%)
21M21.00 mi1.00 mi1396+571333+561333+56876(Top 3%)830(Top 5%)830(Top 16%)
35K21.75 mi0.75 mi1337+591277+561277+56461(Top 2%)427(Top 3%)427(Top 8%)
23M23.00 mi1.25 mi1287+501229+481229+48927(Top 3%)882(Top 6%)882(Top 17%)
24M24.00 mi1.00 mi1233+541176+531176+53735(Top 3%)697(Top 5%)697(Top 13%)
40K24.85 mi0.85 mi1202+311146+301146+30889(Top 3%)842(Top 6%)842(Top 16%)
25.2M25.20 mi0.35 mi12021145+11145+11186(Top 4%)1125(Top 7%)1125(Top 21%)
Finish26.22 mi1.02 mi1196+61140+51140+51421(Top 5%)1344(Top 9%)1344(Top 25%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 7%
×21story building
+97ft-345ft

Overall

1799

Males

1722

M18-39

1722

5K→10K

3.1 - 6.2 mi

Top 7%
×5story building
+79ft-138ft

Overall

1781

Males

1703

M18-39

1703

10K→15K

6.2 - 9.3 mi

Top 7%
×3story building
+67ft-78ft

Overall

1799

Males

1722

M18-39

1722

15K→20K

9.3 - 12.4 mi

Top 6%
×5story building
+106ft-86ft

Overall

1597

Males

1527

M18-39

1527

20K→Half

12.4 - 13.1 mi

Top 6%
×2story building
+19ft-37ft

Overall

1661

Males

1591

M18-39

1591

Half→25K

13.1 - 15.5 mi

Top 6%
×4story building
+66ft-88ft

Overall

1548

Males

1483

M18-39

1483

25K→30K

15.5 - 18.6 mi

Top 4%
×9story building
+181ft-148ft

Overall

1122

Males

1069

M18-39

1069

30K→20M

18.6 - 20.0 mi

Top 5%
×5story building
+64ft-50ft

Overall

1277

Males

1216

M18-39

1216

20M→21M

20.0 - 21.0 mi

Top 3%
×8story building
+106ft-24ft

Overall

876

Males

830

M18-39

830

21M→35K

21.0 - 21.8 mi

Top 2%
×7story building
+17ft-86ft

Overall

461

Males

427

M18-39

427

35K→23M

21.8 - 23.0 mi

Top 3%
×5story building
+23ft-63ft

Overall

927

Males

882

M18-39

882

23M→24M

23.0 - 24.0 mi

Top 3%
×6story building
+12ft-82ft

Overall

735

Males

697

M18-39

697

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

889

Males

842

M18-39

842

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1186

Males

1125

M18-39

1125

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2story building
+22ft-21ft

Overall

1421

Males

1344

M18-39

1344

Passing Analysis

Category:
Athletes Passed
644
Passed By
376
Net Change
+268
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1464
5K → 10K28151-123#1464#1587
10K → 15K3199-68#1587#1655
15K → 20K6036+24#1655#1631
20K → Half1312+1#1631#1630
Half → 25K5621+35#1630#1595
25K → 30K1258+117#1595#1478
30K → 20M3611+25#1478#1453
20M → 21M603+57#1453#1396
21M → 35K590+59#1396#1337
35K → 23M566+50#1337#1287
23M → 24M551+54#1287#1233
24M → 40K343+31#1233#1202
40K → 25.2M880#1202#1202
25.2M → Finish2317+6#1202#1196
TOTALS644376+268
📊

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