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BOSTON MARATHON 2023

David Adlestein

MA

Bib: 29234 M

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

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
9:26/mi
29:20
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
9:04/mi
57:30
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:08/mi
1:25:53
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:07/mi
1:54:13
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:56/mi
2:00:19
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:46/mi
2:21:35
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:54/mi
2:49:14
↑ 181↓ 1480.2%
138 ft elev
20M
9:02/mi
3:01:31
↑ 64↓ 500.2%
148 ft elev
21M
9:22/mi
3:10:53
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:43/mi
3:17:24
↑ 17↓ 861.7%
156 ft elev
23M
9:09/mi
3:28:52
↑ 23↓ 630.6%
116 ft elev
24M
8:46/mi
3:37:38
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:46/mi
3:45:08
↓ 200.3%
20 ft elev
25.2M
8:54/mi
3:48:12
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:48/mi
3:56:09
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
2:00:199:11 /mi+3.7%
2nd Half
1:55:508:50 /mi✓ faster
Negative split — 3.7% faster in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:2429:209:2629:20
9:26
-
10K
6.21 mi12:15:3457:309:1528:10
9:04
-0:22
15K
9.32 mi12:43:571:25:539:1328:23
9:08
+0:04
20K
12.43 mi13:12:171:54:139:1128:20
9:07
-0:01
Half
13.11 mi13:18:232:00:199:116:06
8:56
-0:11
25K
15.53 mi13:39:392:21:359:0721:16
8:46
-0:10
30K
18.64 mi14:07:182:49:149:0527:39
8:54
+0:08
20M
20.00 mi14:19:353:01:319:0512:17
9:02
+0:08
21M
21.00 mi14:28:573:10:539:059:22
9:22
+0:20
35K
21.75 mi14:35:283:17:249:056:31
8:43
-0:39
23M
23.00 mi14:46:563:28:529:0511:28
9:09
+0:26
24M
24.00 mi14:55:423:37:389:048:46
8:46
-0:23
40K
24.85 mi15:03:123:45:089:037:30
8:46
0:00
25.2M
25.20 mi15:06:163:48:129:033:04
8:54
+0:08
Finish
26.22 mi15:14:133:56:099:017:57
7:48
-1:06

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

7:48 /mi

Average Pace

9:01 /mi

Slowest Pace

9:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

14:28

6% of race

Time at Steady Pace

1:54:48

49% of race

Time at Slower Pace

1:46:53

45% of race

Average Pace: 9:00 /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 mi11:47:2429:209:2629:20
9:26
#21908
10K
6.21 mi12:15:3457:309:1528:10
9:04
#21574
15K
9.32 mi12:43:571:25:539:1328:23
9:08
#21409
20K
12.43 mi13:12:171:54:139:1128:20
9:07
#21157
Half
13.11 mi13:18:232:00:199:116:06
8:56
#21106
25K
15.53 mi13:39:392:21:359:0721:16
8:46
#20617
30K
18.64 mi14:07:182:49:149:0527:39
8:54
#19957
20M
20.00 mi14:19:353:01:319:0512:17
9:02
#19704
21M
21.00 mi14:28:573:10:539:059:22
9:22
#19465
35K
21.75 mi14:35:283:17:249:056:31
8:43
#19351
23M
23.00 mi14:46:563:28:529:0511:28
9:09
#19210
24M
24.00 mi14:55:423:37:389:048:46
8:46
#19078
40K
24.85 mi15:03:123:45:089:037:30
8:46
#18946
25.2M
25.20 mi15:06:163:48:129:033:04
8:54
#18836
Finish
26.22 mi15:14:133:56:099:017:57
7:48
#18586
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi219081304713047210811277812778
10K6.21 mi3.10 mi21574+33412935+11212935+112211351276812768
15K9.32 mi3.11 mi21409+16512885+5012885+50210811277812778
20K12.43 mi3.11 mi21157+25212784+10112784+101202121240012400
Half13.11 mi0.68 mi21106+5112756+2812756+28201281235512355
25K15.53 mi2.42 mi20617+48912546+21012546+210177821131511315
30K18.64 mi3.11 mi19957+66012227+31912227+319166511077010770
20M20.00 mi1.36 mi19704+25312123+10412123+104167451072710727
21M21.00 mi1.00 mi19465+23912002+12112002+121153291007210072
35K21.75 mi0.75 mi19351+11411951+5111951+51164561047310473
23M23.00 mi1.25 mi19210+14111890+6111890+61168451062310623
24M24.00 mi1.00 mi19078+13211818+7211818+72160211018910189
40K24.85 mi0.85 mi18946+13211757+6111757+611493196659665
25.2M25.20 mi0.35 mi18836+11011694+6311694+631190182448244
Finish26.22 mi1.02 mi18586+25011579+11511579+1151068976547654

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

21081

Males

12778

M18-39

12778

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

21135

Males

12768

M18-39

12768

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

21081

Males

12778

M18-39

12778

15K→20K

9.3 - 12.4 mi

Top 76%
×5story building
+106ft-86ft

Overall

20212

Males

12400

M18-39

12400

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

20128

Males

12355

M18-39

12355

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17782

Males

11315

M18-39

11315

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

16651

Males

10770

M18-39

10770

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

16745

Males

10727

M18-39

10727

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

15329

Males

10072

M18-39

10072

21M→35K

21.0 - 21.8 mi

Top 62%
×7story building
+17ft-86ft

Overall

16456

Males

10473

M18-39

10473

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

16845

Males

10623

M18-39

10623

23M→24M

23.0 - 24.0 mi

Top 60%
×6story building
+12ft-82ft

Overall

16021

Males

10189

M18-39

10189

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

14931

Males

9665

M18-39

9665

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

11901

Males

8244

M18-39

8244

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

10689

Males

7654

M18-39

7654

Passing Analysis

Category:
Athletes Passed
3628
Passed By
306
Net Change
+3322
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21908
5K → 10K461127+334#21908#21574
10K → 15K26297+165#21574#21409
15K → 20K29139+252#21409#21157
20K → Half6110+51#21157#21106
Half → 25K4890+489#21106#20617
25K → 30K6600+660#20617#19957
30K → 20M2530+253#19957#19704
20M → 21M2390+239#19704#19465
21M → 35K1173+114#19465#19351
35K → 23M15615+141#19351#19210
23M → 24M1397+132#19210#19078
24M → 40K1375+132#19078#18946
40K → 25.2M1100+110#18946#18836
25.2M → Finish2533+250#18836#18586
TOTALS3628306+3322

Passing Charts

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