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BOSTON MARATHON 2023

Dan Lew

Bib: 24274•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 (M70-74)
#0 / 213
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
9:34/mi
29:44
↑ 97↓ 3451.5%
10K· 6.21 mi
9:27/mi
59:05
↑ 79↓ 1380.4%
15K· 9.32 mi
9:35/mi
1:28:50
↑ 67↓ 78
20K· 12.43 mi
9:36/mi
1:58:39
↑ 106↓ 860.1%
Half· 13.11 mi
9:30/mi
2:05:08
↑ 19↓ 370.5%
25K· 15.53 mi
10:03/mi
2:29:31
↑ 66↓ 880.2%
30K· 18.64 mi
10:19/mi
3:01:33
↑ 181↓ 1480.2%
20M
10:26/mi
3:15:44
↑ 64↓ 500.2%
21M
11:51/mi
3:27:35
↑ 106↓ 241.6%
35K· 21.75 mi
9:56/mi
3:35:01
↑ 17↓ 861.7%
23M
10:18/mi
3:47:55
↑ 23↓ 630.6%
24M
10:29/mi
3:58:24
↓ 821.3%
40K· 24.85 mi
10:53/mi
4:07:42
↓ 200.3%
25.2M
11:39/mi
4:11:43
↑ 13↓ 160.2%
Finish· 26.22 mi
9:57/mi
4:21:51
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:05:08
Pace9:33 /mi
2nd Half
Distance13.11 mi
Time2:16:43
Pace10:26 /mi
📊Positive Split: 9.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:0129:449:3429:44
9:34
-
10K
6.21 mi12:15:2259:059:3129:21
9:27
-0:07
15K
9.32 mi12:45:071:28:509:3229:45
9:35
+0:08
20K
12.43 mi13:14:561:58:399:3329:49
9:36
+0:01
Half
13.11 mi13:21:252:05:089:336:29
9:30
-0:06
25K
15.53 mi13:45:482:29:319:3724:23
10:03
+0:33
30K
18.64 mi14:17:503:01:339:4432:02
10:19
+0:16
20M
20.00 mi14:32:013:15:449:4714:11
10:26
+0:07
21M
21.00 mi14:43:523:27:359:5311:51
11:51
+1:25
35K
21.75 mi14:51:183:35:019:537:26
9:56
-1:55
23M
23.00 mi15:04:123:47:559:5512:54
10:18
+0:22
24M
24.00 mi15:14:413:58:249:5610:29
10:29
+0:11
40K
24.85 mi15:23:594:07:429:589:18
10:53
+0:24
25.2M
25.20 mi15:28:004:11:439:594:01
11:39
+0:46
Finish
26.22 mi15:38:084:21:5110:0010:08
9:57
-1:42

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

9:27 /mi

Average Pace

10:00 /mi

Slowest Pace

11:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:05:08

48% of race

Time at Steady Pace

1:26:53

33% of race

Time at Slower Pace

49:50

19% of race

Average Pace: 9:59 /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 mi11:46:0129:449:3429:44
9:34
#22289
10K
6.21 mi12:15:2259:059:3129:21
9:27
#22345
15K
9.32 mi12:45:071:28:509:3229:45
9:35
#22403
20K
12.43 mi13:14:561:58:399:3329:49
9:36
#22252
Half
13.11 mi13:21:252:05:089:336:29
9:30
#22236
25K
15.53 mi13:45:482:29:319:3724:23
10:03
#22277
30K
18.64 mi14:17:503:01:339:4432:02
10:19
#22184
20M
20.00 mi14:32:013:15:449:4714:11
10:26
#22127
21M
21.00 mi14:43:523:27:359:5311:51
11:51
#22147
35K
21.75 mi14:51:183:35:019:537:26
9:56
#22098
23M
23.00 mi15:04:123:47:559:5512:54
10:18
#22029
24M
24.00 mi15:14:413:58:249:5610:29
10:29
#22025
40K
24.85 mi15:23:594:07:429:589:18
10:53
#22015
25.2M
25.20 mi15:28:004:11:439:594:01
11:39
#22013
Finish
26.22 mi15:38:084:21:5110:0010:08
9:57
#21996
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi22289132431324322454(Top 84%)13391(Top 88%)13391(Top 6287%)
10K6.21 mi3.10 mi22345-5613303-6013303-6022348(Top 84%)13321(Top 88%)13321(Top 6254%)
15K9.32 mi3.11 mi22403-5813338-3513338-3522454(Top 84%)13391(Top 88%)13391(Top 6287%)
20K12.43 mi3.11 mi22252+15113269+6913269+6921841(Top 82%)13115(Top 86%)13115(Top 6157%)
Half13.11 mi0.68 mi22236+1613261+813261+822104(Top 83%)13244(Top 87%)13244(Top 6218%)
25K15.53 mi2.42 mi22277-4113264-313264-322333(Top 84%)13294(Top 88%)13294(Top 6241%)
30K18.64 mi3.11 mi22184+9313225+3913225+3921798(Top 82%)12986(Top 86%)12986(Top 6097%)
20M20.00 mi1.36 mi22127+5713185+4013185+4021583(Top 81%)12817(Top 84%)12817(Top 6017%)
21M21.00 mi1.00 mi22147-2013186-113186-122496(Top 85%)13201(Top 87%)13201(Top 6198%)
35K21.75 mi0.75 mi22098+4913157+2913157+2921105(Top 79%)12543(Top 83%)12543(Top 5889%)
23M23.00 mi1.25 mi22029+6913122+3513122+3520830(Top 78%)12388(Top 82%)12388(Top 5816%)
24M24.00 mi1.00 mi22025+413110+1213110+1221997(Top 83%)12878(Top 85%)12878(Top 6046%)
40K24.85 mi0.85 mi22015+1013100+1013100+1022096(Top 83%)12882(Top 85%)12882(Top 6048%)
25.2M25.20 mi0.35 mi22013+213093+713093+721833(Top 82%)12776(Top 84%)12776(Top 5998%)
Finish26.22 mi1.02 mi21996+1713075+1813075+1821603(Top 81%)12672(Top 84%)12672(Top 5949%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21story building
+97ft-345ft

Overall

22454

Males

13391

M70-74

13391

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

22348

Males

13321

M70-74

13321

10K→15K

6.2 - 9.3 mi

Top 84%
×3story building
+67ft-78ft

Overall

22454

Males

13391

M70-74

13391

15K→20K

9.3 - 12.4 mi

Top 82%
×5story building
+106ft-86ft

Overall

21841

Males

13115

M70-74

13115

20K→Half

12.4 - 13.1 mi

Top 83%
×2story building
+19ft-37ft

Overall

22104

Males

13244

M70-74

13244

Half→25K

13.1 - 15.5 mi

Top 84%
×4story building
+66ft-88ft

Overall

22333

Males

13294

M70-74

13294

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

21798

Males

12986

M70-74

12986

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

21583

Males

12817

M70-74

12817

20M→21M

20.0 - 21.0 mi

Top 85%
×8story building
+106ft-24ft

Overall

22496

Males

13201

M70-74

13201

21M→35K

21.0 - 21.8 mi

Top 79%
×7story building
+17ft-86ft

Overall

21105

Males

12543

M70-74

12543

35K→23M

21.8 - 23.0 mi

Top 78%
×5story building
+23ft-63ft

Overall

20830

Males

12388

M70-74

12388

23M→24M

23.0 - 24.0 mi

Top 83%
×6story building
+12ft-82ft

Overall

21997

Males

12878

M70-74

12878

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

22096

Males

12882

M70-74

12882

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

21833

Males

12776

M70-74

12776

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2story building
+22ft-21ft

Overall

21603

Males

12672

M70-74

12672

Passing Analysis

Category:
Athletes Passed
1280
Passed By
987
Net Change
+293
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22289
5K → 10K215271-56#22289#22345
10K → 15K131189-58#22345#22403
15K → 20K21463+151#22403#22252
20K → Half3014+16#22252#22236
Half → 25K88129-41#22236#22277
25K → 30K16875+93#22277#22184
30K → 20M9538+57#22184#22127
20M → 21M4868-20#22127#22147
21M → 35K523+49#22147#22098
35K → 23M8920+69#22098#22029
23M → 24M4642+4#22029#22025
24M → 40K4131+10#22025#22015
40K → 25.2M2018+2#22015#22013
25.2M → Finish4326+17#22013#21996
TOTALS1280987+293
📊

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