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BOSTON MARATHON 2023

Laibin Liu

Bib: 19889•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Top 49%
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
8:31/mi
26:28
↑ 97↓ 3451.5%
10K· 6.21 mi
8:21/mi
52:23
↑ 79↓ 1380.4%
15K· 9.32 mi
8:26/mi
1:18:36
↑ 67↓ 78
20K· 12.43 mi
8:49/mi
1:46:01
↑ 106↓ 860.1%
Half· 13.11 mi
8:39/mi
1:51:55
↑ 19↓ 370.5%
25K· 15.53 mi
8:46/mi
2:13:10
↑ 66↓ 880.2%
30K· 18.64 mi
9:12/mi
2:41:45
↑ 181↓ 1480.2%
20M
9:15/mi
2:54:19
↑ 64↓ 500.2%
21M
10:00/mi
3:04:19
↑ 106↓ 241.6%
35K· 21.75 mi
8:41/mi
3:10:49
↑ 17↓ 861.7%
23M
9:09/mi
3:22:17
↑ 23↓ 630.6%
24M
8:15/mi
3:30:32
↓ 821.3%
40K· 24.85 mi
8:32/mi
3:37:50
↓ 200.3%
25.2M
9:23/mi
3:41:04
↑ 13↓ 160.2%
Finish· 26.22 mi
8:21/mi
3:49:35
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:55
Pace8:32 /mi
2nd Half
Distance13.11 mi
Time1:57:40
Pace8:59 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0026:288:3126:28
8:31
-
10K
6.21 mi11:44:5552:238:2625:55
8:21
-0:10
15K
9.32 mi12:11:081:18:368:2626:13
8:26
+0:05
20K
12.43 mi12:38:331:46:018:3227:25
8:49
+0:23
Half
13.11 mi12:44:271:51:558:325:54
8:39
-0:10
25K
15.53 mi13:05:422:13:108:3421:15
8:46
+0:07
30K
18.64 mi13:34:172:41:458:4128:35
9:12
+0:26
20M
20.00 mi13:46:512:54:198:4312:34
9:15
+0:03
21M
21.00 mi13:56:513:04:198:4710:00
10:00
+0:45
35K
21.75 mi14:03:213:10:498:466:30
8:41
-1:19
23M
23.00 mi14:14:493:22:178:4811:28
9:09
+0:28
24M
24.00 mi14:23:043:30:328:468:15
8:15
-0:54
40K
24.85 mi14:30:223:37:508:467:18
8:32
+0:17
25.2M
25.20 mi14:33:363:41:048:463:14
9:23
+0:51
Finish
26.22 mi14:42:073:49:358:468:31
8:21
-1:02

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

8:15 /mi

Average Pace

8:46 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:08:54

30% of race

Time at Steady Pace

1:34:50

41% of race

Time at Slower Pace

1:05:51

29% of race

Average Pace: 8:45 /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 mi11:19:0026:288:3126:28
8:31
#17677
10K
6.21 mi11:44:5552:238:2625:55
8:21
#17414
15K
9.32 mi12:11:081:18:368:2626:13
8:26
#17411
20K
12.43 mi12:38:331:46:018:3227:25
8:49
#17759
Half
13.11 mi12:44:271:51:558:325:54
8:39
#17799
25K
15.53 mi13:05:422:13:108:3421:15
8:46
#17770
30K
18.64 mi13:34:172:41:458:4128:35
9:12
#17820
20M
20.00 mi13:46:512:54:198:4312:34
9:15
#17814
21M
21.00 mi13:56:513:04:198:4710:00
10:00
#17838
35K
21.75 mi14:03:213:10:498:466:30
8:41
#17774
23M
23.00 mi14:14:493:22:178:4811:28
9:09
#17735
24M
24.00 mi14:23:043:30:328:468:15
8:15
#17532
40K
24.85 mi14:30:223:37:508:467:18
8:32
#17381
25.2M
25.20 mi14:33:363:41:048:463:14
9:23
#17332
Finish
26.22 mi14:42:073:49:358:468:31
8:21
#17250
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi17677112991129917385(Top 65%)11215(Top 74%)11215(Top 1010%)
10K6.21 mi3.10 mi17414+26311223+7611223+7617192(Top 65%)11179(Top 74%)11179(Top 1007%)
15K9.32 mi3.11 mi17411+311227-411227-417385(Top 65%)11215(Top 74%)11215(Top 1010%)
20K12.43 mi3.11 mi17759-34811360-13311360-13318799(Top 71%)11811(Top 78%)11811(Top 1064%)
Half13.11 mi0.68 mi17799-4011378-1811378-1818549(Top 70%)11710(Top 77%)11710(Top 1055%)
25K15.53 mi2.42 mi17770+2911353+2511353+2517734(Top 67%)11290(Top 74%)11290(Top 1017%)
30K18.64 mi3.11 mi17820-5011350+311350+318162(Top 68%)11398(Top 75%)11398(Top 1027%)
20M20.00 mi1.36 mi17814+611324+2611324+2617771(Top 67%)11128(Top 73%)11128(Top 1003%)
21M21.00 mi1.00 mi17838-2411325-111325-118019(Top 68%)11226(Top 74%)11226(Top 1011%)
35K21.75 mi0.75 mi17774+6411286+3911286+3916332(Top 61%)10418(Top 69%)10418(Top 939%)
23M23.00 mi1.25 mi17735+3911249+3711249+3716835(Top 63%)10613(Top 70%)10613(Top 956%)
24M24.00 mi1.00 mi17532+20311162+8711162+8712935(Top 49%)8827(Top 58%)8827(Top 795%)
40K24.85 mi0.85 mi17381+15111089+7311089+7313582(Top 51%)9058(Top 60%)9058(Top 816%)
25.2M25.20 mi0.35 mi17332+4911058+3111058+3114540(Top 55%)9496(Top 63%)9496(Top 855%)
Finish26.22 mi1.02 mi17250+8211014+4411014+4414447(Top 54%)9467(Top 62%)9467(Top 853%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

17385

Males

11215

M60-64

11215

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

17192

Males

11179

M60-64

11179

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

17385

Males

11215

M60-64

11215

15K→20K

9.3 - 12.4 mi

Top 71%
×5story building
+106ft-86ft

Overall

18799

Males

11811

M60-64

11811

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

18549

Males

11710

M60-64

11710

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17734

Males

11290

M60-64

11290

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

18162

Males

11398

M60-64

11398

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

17771

Males

11128

M60-64

11128

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

18019

Males

11226

M60-64

11226

21M→35K

21.0 - 21.8 mi

Top 61%
×7story building
+17ft-86ft

Overall

16332

Males

10418

M60-64

10418

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

16835

Males

10613

M60-64

10613

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

12935

Males

8827

M60-64

8827

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

13582

Males

9058

M60-64

9058

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14540

Males

9496

M60-64

9496

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

14447

Males

9467

M60-64

9467

Passing Analysis

Category:
Athletes Passed
1959
Passed By
1532
Net Change
+427
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17677
5K → 10K474211+263#17677#17414
10K → 15K198195+3#17414#17411
15K → 20K82430-348#17411#17759
20K → Half1858-40#17759#17799
Half → 25K138109+29#17799#17770
25K → 30K163213-50#17770#17820
30K → 20M9589+6#17820#17814
20M → 21M78102-24#17814#17838
21M → 35K8420+64#17838#17774
35K → 23M10162+39#17774#17735
23M → 24M2041+203#17735#17532
24M → 40K1543+151#17532#17381
40K → 25.2M6112+49#17381#17332
25.2M → Finish10927+82#17332#17250
TOTALS19591532+427
📊

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