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BOSTON MARATHON 2023

Tak Cheung Ngai

Bib: 31985•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
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
10:10/mi
31:34
↑ 97↓ 3451.5%
10K· 6.21 mi
9:51/mi
1:02:11
↑ 79↓ 1380.4%
15K· 9.32 mi
9:51/mi
1:32:47
↑ 67↓ 78
20K· 12.43 mi
9:54/mi
2:03:32
↑ 106↓ 860.1%
Half· 13.11 mi
9:43/mi
2:10:10
↑ 19↓ 370.5%
25K· 15.53 mi
9:55/mi
2:34:13
↑ 66↓ 880.2%
30K· 18.64 mi
10:18/mi
3:06:13
↑ 181↓ 1480.2%
20M
10:31/mi
3:20:30
↑ 64↓ 500.2%
21M
10:31/mi
3:31:01
↑ 106↓ 241.6%
35K· 21.75 mi
9:51/mi
3:38:23
↑ 17↓ 861.7%
23M
10:03/mi
3:50:58
↑ 23↓ 630.6%
24M
9:32/mi
4:00:30
↓ 821.3%
40K· 24.85 mi
9:42/mi
4:08:48
↓ 200.3%
25.2M
11:33/mi
4:12:47
↑ 13↓ 160.2%
Finish· 26.22 mi
9:46/mi
4:22:44
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:10:10
Pace9:56 /mi
2nd Half
Distance13.11 mi
Time2:12:34
Pace10:07 /mi
📊Positive Split: 1.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:5831:3410:1031:34
10:10
-
10K
6.21 mi12:23:351:02:1110:0030:37
9:51
-0:19
15K
9.32 mi12:54:111:32:479:5730:36
9:51
0:00
20K
12.43 mi13:24:562:03:329:5630:45
9:54
+0:03
Half
13.11 mi13:31:342:10:109:566:38
9:43
-0:11
25K
15.53 mi13:55:372:34:139:5624:03
9:55
+0:12
30K
18.64 mi14:27:373:06:139:5932:00
10:18
+0:23
20M
20.00 mi14:41:543:20:3010:0214:17
10:31
+0:13
21M
21.00 mi14:52:253:31:0110:0310:31
10:31
0:00
35K
21.75 mi14:59:473:38:2310:027:22
9:51
-0:40
23M
23.00 mi15:12:223:50:5810:0312:35
10:03
+0:12
24M
24.00 mi15:21:544:00:3010:019:32
9:32
-0:31
40K
24.85 mi15:30:124:08:4810:018:18
9:42
+0:10
25.2M
25.20 mi15:34:114:12:4710:023:59
11:33
+1:51
Finish
26.22 mi15:44:084:22:4410:029:57
9:46
-1:47

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

9:32 /mi

Average Pace

10:02 /mi

Slowest Pace

11:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

9:32

4% of race

Time at Steady Pace

2:40:51

61% of race

Time at Slower Pace

1:32:21

35% of race

Average Pace: 10:01 /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 mi11:52:5831:3410:1031:34
10:10
#23839
10K
6.21 mi12:23:351:02:1110:0030:37
9:51
#23636
15K
9.32 mi12:54:111:32:479:5730:36
9:51
#23509
20K
12.43 mi13:24:562:03:329:5630:45
9:54
#23299
Half
13.11 mi13:31:342:10:109:566:38
9:43
#23270
25K
15.53 mi13:55:372:34:139:5624:03
9:55
#23010
30K
18.64 mi14:27:373:06:139:5932:00
10:18
#22775
20M
20.00 mi14:41:543:20:3010:0214:17
10:31
#22696
21M
21.00 mi14:52:253:31:0110:0310:31
10:31
#22541
35K
21.75 mi14:59:473:38:2310:027:22
9:51
#22474
23M
23.00 mi15:12:223:50:5810:0312:35
10:03
#22341
24M
24.00 mi15:21:544:00:3010:019:32
9:32
#22237
40K
24.85 mi15:30:124:08:4810:018:18
9:42
#22128
25.2M
25.20 mi15:34:114:12:4710:023:59
11:33
#22118
Finish
26.22 mi15:44:084:22:4410:029:57
9:46
#22084
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi23839140051400523170(Top 87%)13713(Top 90%)13713(Top 609%)
10K6.21 mi3.10 mi23636+20313920+8513920+8523385(Top 88%)13804(Top 91%)13804(Top 613%)
15K9.32 mi3.11 mi23509+12713871+4913871+4923170(Top 87%)13713(Top 90%)13713(Top 609%)
20K12.43 mi3.11 mi23299+21013768+10313768+10322626(Top 85%)13452(Top 89%)13452(Top 597%)
Half13.11 mi0.68 mi23270+2913751+1713751+1722679(Top 85%)13479(Top 89%)13479(Top 599%)
25K15.53 mi2.42 mi23010+26013622+12913622+12922028(Top 83%)13157(Top 87%)13157(Top 584%)
30K18.64 mi3.11 mi22775+23513481+14113481+14121771(Top 82%)12973(Top 85%)12973(Top 576%)
20M20.00 mi1.36 mi22696+7913433+4813433+4821770(Top 82%)12890(Top 85%)12890(Top 572%)
21M21.00 mi1.00 mi22541+15513357+7613357+7619625(Top 74%)11882(Top 78%)11882(Top 528%)
35K21.75 mi0.75 mi22474+6713322+3513322+3520869(Top 78%)12428(Top 82%)12428(Top 552%)
23M23.00 mi1.25 mi22341+13313257+6513257+6520130(Top 76%)12079(Top 80%)12079(Top 536%)
24M24.00 mi1.00 mi22237+10413203+5413203+5419332(Top 73%)11687(Top 77%)11687(Top 519%)
40K24.85 mi0.85 mi22128+10913147+5613147+5619045(Top 72%)11506(Top 76%)11506(Top 511%)
25.2M25.20 mi0.35 mi22118+1013136+1113136+1121647(Top 81%)12692(Top 84%)12692(Top 564%)
Finish26.22 mi1.02 mi22084+3413109+2713109+2721029(Top 79%)12436(Top 82%)12436(Top 552%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21story building
+97ft-345ft

Overall

23170

Males

13713

M45-49

13713

5K→10K

3.1 - 6.2 mi

Top 88%
×5story building
+79ft-138ft

Overall

23385

Males

13804

M45-49

13804

10K→15K

6.2 - 9.3 mi

Top 87%
×3story building
+67ft-78ft

Overall

23170

Males

13713

M45-49

13713

15K→20K

9.3 - 12.4 mi

Top 85%
×5story building
+106ft-86ft

Overall

22626

Males

13452

M45-49

13452

20K→Half

12.4 - 13.1 mi

Top 85%
×2story building
+19ft-37ft

Overall

22679

Males

13479

M45-49

13479

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

22028

Males

13157

M45-49

13157

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

21771

Males

12973

M45-49

12973

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

21770

Males

12890

M45-49

12890

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

19625

Males

11882

M45-49

11882

21M→35K

21.0 - 21.8 mi

Top 78%
×7story building
+17ft-86ft

Overall

20869

Males

12428

M45-49

12428

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

20130

Males

12079

M45-49

12079

23M→24M

23.0 - 24.0 mi

Top 73%
×6story building
+12ft-82ft

Overall

19332

Males

11687

M45-49

11687

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

19045

Males

11506

M45-49

11506

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

21647

Males

12692

M45-49

12692

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2story building
+22ft-21ft

Overall

21029

Males

12436

M45-49

12436

Passing Analysis

Category:
Athletes Passed
2100
Passed By
345
Net Change
+1755
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23839
5K → 10K321118+203#23839#23636
10K → 15K19467+127#23636#23509
15K → 20K25141+210#23509#23299
20K → Half389+29#23299#23270
Half → 25K27313+260#23270#23010
25K → 30K25621+235#23010#22775
30K → 20M10021+79#22775#22696
20M → 21M1594+155#22696#22541
21M → 35K703+67#22541#22474
35K → 23M14310+133#22474#22341
23M → 24M1051+104#22341#22237
24M → 40K1134+109#22237#22128
40K → 25.2M2313+10#22128#22118
25.2M → Finish5420+34#22118#22084
TOTALS2100345+1755
📊

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