Boston Marathon logo
BOSTON MARATHON 2023

Sam Dawley

Bib: 26161•M

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:18
Rank: #22791
Start → 5K
9:45/mi
30:18 split
10K· 6.21 mi
57:50
Rank: #21747 (+1044)
5K → 10K
8:52/mi
27:32 split
15K· 9.32 mi
1:24:17
Rank: #20763 (+984)
10K → 15K
8:31/mi
26:27 split
20K· 12.43 mi
1:51:50
Rank: #20357 (+406)
15K → 20K
8:52/mi
27:33 split
Half· 13.11 mi
1:57:40
Rank: #20244 (+113)
20K → Half
8:33/mi
5:50 split
25K· 15.53 mi
2:18:15
Rank: #19615 (+629)
Half → 25K
8:29/mi
20:35 split
30K· 18.64 mi
2:44:45
Rank: #18779 (+836)
25K → 30K
8:32/mi
26:30 split
20M
2:56:29
Rank: #18464 (+315)
30K → 20M
8:38/mi
11:44 split
21M
3:05:06
Rank: #18046 (+418)
20M → 21M
8:37/mi
8:37 split
35K· 21.75 mi
3:11:13
Rank: #17893 (+153)
21M → 35K
8:11/mi
6:07 split
23M
3:21:16
Rank: #17465 (+428)
35K → 23M
8:02/mi
10:03 split
24M
3:29:08
Rank: #17174 (+291)
23M → 24M
7:52/mi
7:52 split
40K· 24.85 mi
3:35:41
Rank: #16855 (+319)
24M → 40K
7:40/mi
6:33 split
25.2M
3:38:35
Rank: #16739 (+116)
40K → 25.2M
8:25/mi
2:54 split
Finish· 26.22 mi
3:46:01
Rank: #16374 (+365)
25.2M → Finish
7:18/mi
7:26 split

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via Half
Distance13.11 mi
Time1:57:40
Pace8:59 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:48:21
Pace8:16 /mi
📊Negative Split: 7.9% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:2430:189:4530:18
9:45
-
10K
6.21 mi12:20:5657:509:1827:32
8:52
-0:53
15K
9.32 mi12:47:231:24:179:0326:27
8:31
-0:21
20K
12.43 mi13:14:561:51:509:0027:33
8:52
+0:21
Half
13.11 mi13:20:461:57:408:595:50
8:33
-0:19
25K
15.53 mi13:41:212:18:158:5420:35
8:29
-0:04
30K
18.64 mi14:07:512:44:458:5026:30
8:32
+0:03
20M
20.00 mi14:19:352:56:298:4911:44
8:38
+0:06
21M
21.00 mi14:28:123:05:068:498:37
8:37
-0:01
35K
21.75 mi14:34:193:11:138:486:07
8:11
-0:26
23M
23.00 mi14:44:223:21:168:4510:03
8:02
-0:09
24M
24.00 mi14:52:143:29:088:437:52
7:52
-0:10
40K
24.85 mi14:58:473:35:418:416:33
7:40
-0:12
25.2M
25.20 mi15:01:413:38:358:402:54
8:25
+0:45
Finish
26.22 mi15:09:073:46:018:387:26
7:18
-1:07

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

7:18 /mi

Average Pace

8:38 /mi

Slowest Pace

9:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

38:01

17% of race

Time at Steady Pace

1:42:37

45% of race

Time at Slower Pace

1:25:23

38% of race

Average Pace: 8:37 /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 mi11:53:2430:189:4530:18
9:45
#22791
10K
6.21 mi12:20:5657:509:1827:32
8:52
#21747
15K
9.32 mi12:47:231:24:179:0326:27
8:31
#20763
20K
12.43 mi13:14:561:51:509:0027:33
8:52
#20357
Half
13.11 mi13:20:461:57:408:595:50
8:33
#20244
25K
15.53 mi13:41:212:18:158:5420:35
8:29
#19615
30K
18.64 mi14:07:512:44:458:5026:30
8:32
#18779
20M
20.00 mi14:19:352:56:298:4911:44
8:38
#18464
21M
21.00 mi14:28:123:05:068:498:37
8:37
#18046
35K
21.75 mi14:34:193:11:138:486:07
8:11
#17893
23M
23.00 mi14:44:223:21:168:4510:03
8:02
#17465
24M
24.00 mi14:52:143:29:088:437:52
7:52
#17174
40K
24.85 mi14:58:473:35:418:416:33
7:40
#16855
25.2M
25.20 mi15:01:413:38:358:402:54
8:25
#16739
Finish
26.22 mi15:09:073:46:018:387:26
7:18
#16374
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi22791134971349717891(Top 67%)11435(Top 75%)11435(Top 216%)
10K6.21 mi3.10 mi21747+104413008+48913008+48920219(Top 76%)12363(Top 81%)12363(Top 234%)
15K9.32 mi3.11 mi20763+98412585+42312585+42317891(Top 67%)11435(Top 75%)11435(Top 216%)
20K12.43 mi3.11 mi20357+40612416+16912416+16919034(Top 71%)11903(Top 78%)11903(Top 225%)
Half13.11 mi0.68 mi20244+11312369+4712369+4717934(Top 67%)11456(Top 75%)11456(Top 217%)
25K15.53 mi2.42 mi19615+62912100+26912100+26916118(Top 61%)10587(Top 70%)10587(Top 200%)
30K18.64 mi3.11 mi18779+83611741+35911741+35914501(Top 54%)9859(Top 65%)9859(Top 187%)
20M20.00 mi1.36 mi18464+31511597+14411597+14414479(Top 54%)9774(Top 64%)9774(Top 185%)
21M21.00 mi1.00 mi18046+41811407+19011407+19011154(Top 42%)8203(Top 54%)8203(Top 155%)
35K21.75 mi0.75 mi17893+15311337+7011337+7013273(Top 50%)9114(Top 60%)9114(Top 172%)
23M23.00 mi1.25 mi17465+42811144+19311144+1939942(Top 37%)7457(Top 49%)7457(Top 141%)
24M24.00 mi1.00 mi17174+29111014+13011014+13010281(Top 39%)7554(Top 50%)7554(Top 143%)
40K24.85 mi0.85 mi16855+31910854+16010854+1607723(Top 29%)6087(Top 40%)6087(Top 115%)
25.2M25.20 mi0.35 mi16739+11610802+5210802+528986(Top 34%)6759(Top 45%)6759(Top 128%)
Finish26.22 mi1.02 mi16374+36510651+15110651+1517105(Top 27%)5644(Top 37%)5644(Top 107%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

17891

Males

11435

M18-39

11435

5K→10K

3.1 - 6.2 mi

Top 76%
×5story building
+79ft-138ft

Overall

20219

Males

12363

M18-39

12363

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

17891

Males

11435

M18-39

11435

15K→20K

9.3 - 12.4 mi

Top 71%
×5story building
+106ft-86ft

Overall

19034

Males

11903

M18-39

11903

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

17934

Males

11456

M18-39

11456

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

16118

Males

10587

M18-39

10587

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

14501

Males

9859

M18-39

9859

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

14479

Males

9774

M18-39

9774

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11154

Males

8203

M18-39

8203

21M→35K

21.0 - 21.8 mi

Top 50%
×7story building
+17ft-86ft

Overall

13273

Males

9114

M18-39

9114

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

9942

Males

7457

M18-39

7457

23M→24M

23.0 - 24.0 mi

Top 39%
×6story building
+12ft-82ft

Overall

10281

Males

7554

M18-39

7554

24M→40K

24.0 - 24.9 mi

Top 29%
×1story
+6ft-20ft

Overall

7723

Males

6087

M18-39

6087

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

8986

Males

6759

M18-39

6759

25.2M→Finish

25.2 - 26.2 mi

Top 27%
×2story building
+22ft-21ft

Overall

7105

Males

5644

M18-39

5644

Passing Analysis

Category:
Athletes Passed
6471
Passed By
54
Net Change
+6417
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22791
5K → 10K106016+1044#22791#21747
10K → 15K9862+984#21747#20763
15K → 20K43125+406#20763#20357
20K → Half1163+113#20357#20244
Half → 25K6290+629#20244#19615
25K → 30K8382+836#19615#18779
30K → 20M3172+315#18779#18464
20M → 21M4180+418#18464#18046
21M → 35K1552+153#18046#17893
35K → 23M4291+428#17893#17465
23M → 24M2910+291#17465#17174
24M → 40K3190+319#17174#16855
40K → 25.2M1160+116#16855#16739
25.2M → Finish3661+365#16739#16374
TOTALS647154+6417
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing