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BOSTON MARATHON 2023

Anson Lam

Bib: 8155•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 15%
Gender (Male)
#0 / 15176
Top 24%
Division (M18-39)
#0 / 5285
Top 48%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:11
Rank: #4837
Start → 5K
21:11 | 6:49/mi
10K· 6.21 mi
42:28
Rank: #5247 (-410)
5K → 10K
21:17 | 6:51/mi
15K· 9.32 mi
1:03:44
Rank: #5335 (-88)
10K → 15K
21:16 | 6:51/mi
20K· 12.43 mi
1:24:48
Rank: #5057 (+278)
15K → 20K
21:04 | 6:47/mi
Half· 13.11 mi
1:29:25
Rank: #5058 (-1)
20K → Half
4:37 | 6:46/mi
25K· 15.53 mi
1:45:53
Rank: #4847 (+211)
Half → 25K
16:28 | 6:47/mi
30K· 18.64 mi
2:07:17
Rank: #4547 (+300)
25K → 30K
21:24 | 6:53/mi
20M
2:16:33
Rank: #4395 (+152)
30K → 20M
9:16 | 6:49/mi
21M
2:23:27
Rank: #4151 (+244)
20M → 21M
6:54 | 6:54/mi
35K· 21.75 mi
2:28:33
Rank: #4149 (+2)
21M → 35K
5:06 | 6:49/mi
23M
2:37:11
Rank: #4061 (+88)
35K → 23M
8:38 | 6:54/mi
24M
2:43:57
Rank: #4007 (+54)
23M → 24M
6:46 | 6:46/mi
40K· 24.85 mi
2:49:51
Rank: #3973 (+34)
24M → 40K
5:54 | 6:54/mi
25.2M
2:52:22
Rank: #3940 (+33)
40K → 25.2M
2:31 | 7:18/mi
Finish· 26.22 mi
2:59:09
Rank: #3907 (+33)
25.2M → Finish
6:47 | 6:39/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:29:25
Pace6:49 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:29:44
Pace6:51 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:1921:116:4921:11
6:49
-
10K
6.21 mi11:07:3642:286:5021:17
6:51
+0:02
15K
9.32 mi11:28:521:03:446:5021:16
6:51
0:00
20K
12.43 mi11:49:561:24:486:4921:04
6:47
-0:04
Half
13.11 mi11:54:331:29:256:494:37
6:46
-0:01
25K
15.53 mi12:11:011:45:536:4916:28
6:47
+0:01
30K
18.64 mi12:32:252:07:176:5021:24
6:53
+0:06
20M
20.00 mi12:41:412:16:336:509:16
6:49
-0:04
21M
21.00 mi12:48:352:23:276:506:54
6:54
+0:05
35K
21.75 mi12:53:412:28:336:505:06
6:49
-0:05
23M
23.00 mi13:02:192:37:116:508:38
6:54
+0:05
24M
24.00 mi13:09:052:43:576:506:46
6:46
-0:08
40K
24.85 mi13:14:592:49:516:505:54
6:54
+0:08
25.2M
25.20 mi13:17:302:52:226:502:31
7:18
+0:24
Finish
26.22 mi13:24:172:59:096:506:47
6:39
-0:39

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

6:39 /mi

Average Pace

6:50 /mi

Slowest Pace

7:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:56:38

99% of race

Time at Steady Pace

2:31

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:50 /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 mi10:46:1921:116:4921:11
6:49
#4837
10K
6.21 mi11:07:3642:286:5021:17
6:51
#5247
15K
9.32 mi11:28:521:03:446:5021:16
6:51
#5335
20K
12.43 mi11:49:561:24:486:4921:04
6:47
#5057
Half
13.11 mi11:54:331:29:256:494:37
6:46
#5058
25K
15.53 mi12:11:011:45:536:4916:28
6:47
#4847
30K
18.64 mi12:32:252:07:176:5021:24
6:53
#4547
20M
20.00 mi12:41:412:16:336:509:16
6:49
#4395
21M
21.00 mi12:48:352:23:276:506:54
6:54
#4151
35K
21.75 mi12:53:412:28:336:505:06
6:49
#4149
23M
23.00 mi13:02:192:37:116:508:38
6:54
#4061
24M
24.00 mi13:09:052:43:576:506:46
6:46
#4007
40K
24.85 mi13:14:592:49:516:505:54
6:54
#3973
25.2M
25.20 mi13:17:302:52:226:502:31
7:18
#3940
Finish
26.22 mi13:24:172:59:096:506:47
6:39
#3907
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4837449644965501(Top 21%)5064(Top 33%)5064(Top 96%)
10K6.21 mi3.10 mi5247-4104853-3574853-3575733(Top 22%)5245(Top 35%)5245(Top 99%)
15K9.32 mi3.11 mi5335-884936-834936-835501(Top 21%)5064(Top 33%)5064(Top 96%)
20K12.43 mi3.11 mi5057+2784695+2414695+2414249(Top 16%)3977(Top 26%)3977(Top 75%)
Half13.11 mi0.68 mi5058-14696-14696-14911(Top 18%)4543(Top 30%)4543(Top 86%)
25K15.53 mi2.42 mi4847+2114508+1884508+1884071(Top 15%)3817(Top 25%)3817(Top 72%)
30K18.64 mi3.11 mi4547+3004244+2644244+2643578(Top 13%)3360(Top 22%)3360(Top 64%)
20M20.00 mi1.36 mi4395+1524103+1414103+1412958(Top 11%)2783(Top 18%)2783(Top 53%)
21M21.00 mi1.00 mi4151+2443890+2133890+2131778(Top 7%)1691(Top 11%)1691(Top 32%)
35K21.75 mi0.75 mi4149+23884+63884+64270(Top 16%)3905(Top 26%)3905(Top 74%)
23M23.00 mi1.25 mi4061+883806+783806+783208(Top 12%)2985(Top 20%)2985(Top 56%)
24M24.00 mi1.00 mi4007+543753+533753+533475(Top 13%)3200(Top 21%)3200(Top 61%)
40K24.85 mi0.85 mi3973+343720+333720+333329(Top 13%)3045(Top 20%)3045(Top 58%)
25.2M25.20 mi0.35 mi3940+333689+313689+312962(Top 11%)2717(Top 18%)2717(Top 51%)
Finish26.22 mi1.02 mi3907+333664+253664+253275(Top 12%)2947(Top 19%)2947(Top 56%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 21%
×21stories
+97ft-345ft

Overall

5501

Males

5064

M18-39

5064

5K→10K

3.1 - 6.2 mi

Top 22%
×5stories
+79ft-138ft

Overall

5733

Males

5245

M18-39

5245

10K→15K

6.2 - 9.3 mi

Top 21%
×3stories
+67ft-78ft

Overall

5501

Males

5064

M18-39

5064

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4249

Males

3977

M18-39

3977

20K→Half

12.4 - 13.1 mi

Top 18%
×2stories
+19ft-37ft

Overall

4911

Males

4543

M18-39

4543

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4071

Males

3817

M18-39

3817

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3578

Males

3360

M18-39

3360

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

2958

Males

2783

M18-39

2783

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1778

Males

1691

M18-39

1691

21M→35K

21.0 - 21.8 mi

Top 16%
×7stories
+17ft-86ft

Overall

4270

Males

3905

M18-39

3905

35K→23M

21.8 - 23.0 mi

Top 12%
×5stories
+23ft-63ft

Overall

3208

Males

2985

M18-39

2985

23M→24M

23.0 - 24.0 mi

Top 13%
×6stories
+12ft-82ft

Overall

3475

Males

3200

M18-39

3200

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3329

Males

3045

M18-39

3045

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

2962

Males

2717

M18-39

2717

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

3275

Males

2947

M18-39

2947

Passing Analysis

Category:
Athletes Passed
1810
Passed By
880
Net Change
+930
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4837
5K → 10K80490-410#4837#5247
10K → 15K70158-88#5247#5335
15K → 20K29416+278#5335#5057
20K → Half2526-1#5057#5058
Half → 25K22312+211#5058#4847
25K → 30K32626+300#4847#4547
30K → 20M1597+152#4547#4395
20M → 21M2451+244#4395#4151
21M → 35K3432+2#4151#4149
35K → 23M10719+88#4149#4061
23M → 24M7723+54#4061#4007
24M → 40K6329+34#4007#3973
40K → 25.2M429+33#3973#3940
25.2M → Finish6532+33#3940#3907
TOTALS1810880+930
📊

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