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BOSTON MARATHON 2023

Sam Liang

Bib: 31883•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
31:38
Rank: #23900
Start → 5K
10:11/mi
31:38 split
10K· 6.21 mi
1:03:40
Rank: #24153 (-253)
5K → 10K
10:19/mi
32:02 split
15K· 9.32 mi
1:36:47
Rank: #24391 (-238)
10K → 15K
10:40/mi
33:07 split
20K· 12.43 mi
2:10:14
Rank: #24384 (+7)
15K → 20K
10:46/mi
33:27 split
Half· 13.11 mi
2:17:33
Rank: #24392 (-8)
20K → Half
10:43/mi
7:19 split
25K· 15.53 mi
2:44:41
Rank: #24354 (+38)
Half → 25K
11:11/mi
27:08 split
30K· 18.64 mi
3:21:56
Rank: #24422 (-68)
25K → 30K
11:59/mi
37:15 split
20M
3:37:30
Rank: #24330 (+92)
30K → 20M
11:27/mi
15:34 split
21M
3:51:27
Rank: #24399 (-69)
20M → 21M
13:57/mi
13:57 split
35K· 21.75 mi
3:59:39
Rank: #24348 (+51)
21M → 35K
10:58/mi
8:12 split
23M
4:14:46
Rank: #24346 (+2)
35K → 23M
12:04/mi
15:07 split
24M
4:26:37
Rank: #24358 (-12)
23M → 24M
11:51/mi
11:51 split
40K· 24.85 mi
4:36:56
Rank: #24355 (+3)
24M → 40K
12:04/mi
10:19 split
25.2M
4:41:21
Rank: #24351 (+4)
40K → 25.2M
12:48/mi
4:25 split
Finish· 26.22 mi
4:52:12
Rank: #24328 (+23)
25.2M → Finish
10:39/mi
10:51 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:17:33
Pace10:30 /mi
2nd Half
Distance13.11 mi
Time2:34:39
Pace11:48 /mi
📊Positive Split: 12.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:0931:3810:1131:38
10:11
-
10K
6.21 mi12:26:111:03:4010:1532:02
10:19
+0:08
15K
9.32 mi12:59:181:36:4710:2333:07
10:40
+0:21
20K
12.43 mi13:32:452:10:1410:2933:27
10:46
+0:06
Half
13.11 mi13:40:042:17:3310:307:19
10:43
-0:03
25K
15.53 mi14:07:122:44:4110:3627:08
11:11
+0:28
30K
18.64 mi14:44:273:21:5610:5037:15
11:59
+0:48
20M
20.00 mi15:00:013:37:3010:5215:34
11:27
-0:32
21M
21.00 mi15:13:583:51:2711:0113:57
13:57
+2:30
35K
21.75 mi15:22:103:59:3911:018:12
10:58
-2:59
23M
23.00 mi15:37:174:14:4611:0515:07
12:04
+1:06
24M
24.00 mi15:49:084:26:3711:0711:51
11:51
-0:13
40K
24.85 mi15:59:274:36:5611:0910:19
12:04
+0:13
25.2M
25.20 mi16:03:524:41:2111:104:25
12:48
+0:44
Finish
26.22 mi16:14:434:52:1211:0910:51
10:39
-2:09

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

10:11 /mi

Average Pace

11:09 /mi

Slowest Pace

13:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:47:38

37% of race

Time at Steady Pace

1:31:40

31% of race

Time at Slower Pace

1:32:54

32% of race

Average Pace: 11:09 /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 mi11:54:0931:3810:1131:38
10:11
#23900
10K
6.21 mi12:26:111:03:4010:1532:02
10:19
#24153
15K
9.32 mi12:59:181:36:4710:2333:07
10:40
#24391
20K
12.43 mi13:32:452:10:1410:2933:27
10:46
#24384
Half
13.11 mi13:40:042:17:3310:307:19
10:43
#24392
25K
15.53 mi14:07:122:44:4110:3627:08
11:11
#24354
30K
18.64 mi14:44:273:21:5610:5037:15
11:59
#24422
20M
20.00 mi15:00:013:37:3010:5215:34
11:27
#24330
21M
21.00 mi15:13:583:51:2711:0113:57
13:57
#24399
35K
21.75 mi15:22:103:59:3911:018:12
10:58
#24348
23M
23.00 mi15:37:174:14:4611:0515:07
12:04
#24346
24M
24.00 mi15:49:084:26:3711:0711:51
11:51
#24358
40K
24.85 mi15:59:274:36:5611:0910:19
12:04
#24355
25.2M
25.20 mi16:03:524:41:2111:104:25
12:48
#24351
Finish
26.22 mi16:14:434:52:1211:0910:51
10:39
#24328
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi23900140411404124738(Top 93%)14402(Top 95%)14402(Top 1013%)
10K6.21 mi3.10 mi24153-25314161-12014161-12024314(Top 91%)14225(Top 94%)14225(Top 1000%)
15K9.32 mi3.11 mi24391-23814268-10714268-10724738(Top 93%)14402(Top 95%)14402(Top 1013%)
20K12.43 mi3.11 mi24384+714252+1614252+1624276(Top 91%)14181(Top 93%)14181(Top 997%)
Half13.11 mi0.68 mi24392-814255-314255-324550(Top 92%)14288(Top 94%)14288(Top 1005%)
25K15.53 mi2.42 mi24354+3814226+2914226+2924255(Top 91%)14145(Top 93%)14145(Top 995%)
30K18.64 mi3.11 mi24422-6814239-1314239-1324483(Top 92%)14193(Top 94%)14193(Top 998%)
20M20.00 mi1.36 mi24330+9214188+5114188+5123455(Top 88%)13671(Top 90%)13671(Top 961%)
21M21.00 mi1.00 mi24399-6914211-2314211-2324985(Top 94%)14358(Top 95%)14358(Top 1010%)
35K21.75 mi0.75 mi24348+5114180+3114180+3123233(Top 87%)13499(Top 89%)13499(Top 949%)
23M23.00 mi1.25 mi24346+214172+814172+824102(Top 91%)13894(Top 92%)13894(Top 977%)
24M24.00 mi1.00 mi24358-1214170+214170+224330(Top 91%)13967(Top 92%)13967(Top 982%)
40K24.85 mi0.85 mi24355+314162+814162+823968(Top 90%)13783(Top 91%)13783(Top 969%)
25.2M25.20 mi0.35 mi24351+414158+414158+423715(Top 89%)13653(Top 90%)13653(Top 960%)
Finish26.22 mi1.02 mi24328+2314142+1614142+1623317(Top 88%)13485(Top 89%)13485(Top 948%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 93%
×21story building
+97ft-345ft

Overall

24738

Males

14402

M55-59

14402

5K→10K

3.1 - 6.2 mi

Top 91%
×5story building
+79ft-138ft

Overall

24314

Males

14225

M55-59

14225

10K→15K

6.2 - 9.3 mi

Top 93%
×3story building
+67ft-78ft

Overall

24738

Males

14402

M55-59

14402

15K→20K

9.3 - 12.4 mi

Top 91%
×5story building
+106ft-86ft

Overall

24276

Males

14181

M55-59

14181

20K→Half

12.4 - 13.1 mi

Top 92%
×2story building
+19ft-37ft

Overall

24550

Males

14288

M55-59

14288

Half→25K

13.1 - 15.5 mi

Top 91%
×4story building
+66ft-88ft

Overall

24255

Males

14145

M55-59

14145

25K→30K

15.5 - 18.6 mi

Top 92%
×9story building
+181ft-148ft

Overall

24483

Males

14193

M55-59

14193

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

23455

Males

13671

M55-59

13671

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

24985

Males

14358

M55-59

14358

21M→35K

21.0 - 21.8 mi

Top 87%
×7story building
+17ft-86ft

Overall

23233

Males

13499

M55-59

13499

35K→23M

21.8 - 23.0 mi

Top 91%
×5story building
+23ft-63ft

Overall

24102

Males

13894

M55-59

13894

23M→24M

23.0 - 24.0 mi

Top 91%
×6story building
+12ft-82ft

Overall

24330

Males

13967

M55-59

13967

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

23968

Males

13783

M55-59

13783

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

23715

Males

13653

M55-59

13653

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

23317

Males

13485

M55-59

13485

Passing Analysis

Category:
Athletes Passed
761
Passed By
1189
Net Change
-428
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23900
5K → 10K95348-253#23900#24153
10K → 15K50288-238#24153#24391
15K → 20K10497+7#24391#24384
20K → Half1624-8#24384#24392
Half → 25K9355+38#24392#24354
25K → 30K87155-68#24354#24422
30K → 20M10513+92#24422#24330
20M → 21M2089-69#24330#24399
21M → 35K554+51#24399#24348
35K → 23M3533+2#24348#24346
23M → 24M2436-12#24346#24358
24M → 40K2219+3#24358#24355
40K → 25.2M1814+4#24355#24351
25.2M → Finish3714+23#24351#24328
TOTALS7611189-428
📊

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