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BOSTON MARATHON 2025

Justin Shaw

Bib: 25810•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 23%
Gender (Male)
#0 / 16105
Top 35%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ 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
7:01/mi
21:48
↑ 97↓ 3451.5%
10K· 6.21 mi
7:09/mi
44:01
↑ 79↓ 1380.4%
15K· 9.32 mi
7:08/mi
1:06:12
↑ 67↓ 78
20K· 12.43 mi
7:08/mi
1:28:22
↑ 106↓ 860.1%
Half· 13.11 mi
7:11/mi
1:33:16
↑ 19↓ 370.5%
25K· 15.53 mi
7:11/mi
1:50:41
↑ 66↓ 880.2%
30K· 18.64 mi
7:16/mi
2:13:17
↑ 181↓ 1480.2%
20M
7:18/mi
2:23:12
↑ 64↓ 500.2%
21M
7:32/mi
2:30:44
↑ 106↓ 241.6%
35K· 21.75 mi
7:04/mi
2:36:01
↑ 17↓ 861.7%
23M
7:06/mi
2:44:54
↑ 23↓ 630.6%
24M
7:08/mi
2:52:02
↓ 821.3%
40K· 24.85 mi
7:09/mi
2:58:09
↓ 200.3%
25.2M
7:53/mi
3:00:52
↑ 13↓ 160.2%
Finish· 26.22 mi
6:49/mi
3:07:49
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:16
Pace7:07 /mi
2nd Half
Distance13.11 mi
Time1:34:33
Pace7:13 /mi
📊Positive Split: 1.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:36:5221:487:0121:48
7:01
-
10K
6.21 mi11:59:0544:017:0522:13
7:09
+0:08
15K
9.32 mi12:21:161:06:127:0622:11
7:08
-0:01
20K
12.43 mi12:43:261:28:227:0722:10
7:08
0:00
Half
13.11 mi12:48:201:33:167:074:54
7:11
+0:03
25K
15.53 mi13:05:451:50:417:0817:25
7:11
0:00
30K
18.64 mi13:28:212:13:177:0922:36
7:16
+0:05
20M
20.00 mi13:38:162:23:127:109:55
7:18
+0:02
21M
21.00 mi13:45:482:30:447:117:32
7:32
+0:14
35K
21.75 mi13:51:052:36:017:105:17
7:04
-0:28
23M
23.00 mi13:59:582:44:547:108:53
7:06
+0:02
24M
24.00 mi14:07:062:52:027:107:08
7:08
+0:02
40K
24.85 mi14:13:132:58:097:106:07
7:09
+0:01
25.2M
25.20 mi14:15:563:00:527:112:43
7:53
+0:44
Finish
26.22 mi14:22:533:07:497:106:57
6:49
-1:04

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

6:49 /mi

Average Pace

7:10 /mi

Slowest Pace

7:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:57:34

95% of race

Time at Steady Pace

10:15

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:10 /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 mi11:36:5221:487:0121:48
7:01
#7941
10K
6.21 mi11:59:0544:017:0522:13
7:09
#8528
15K
9.32 mi12:21:161:06:127:0622:11
7:08
#8490
20K
12.43 mi12:43:261:28:227:0722:10
7:08
#8246
Half
13.11 mi12:48:201:33:167:074:54
7:11
#8256
25K
15.53 mi13:05:451:50:417:0817:25
7:11
#8101
30K
18.64 mi13:28:212:13:177:0922:36
7:16
#7670
20M
20.00 mi13:38:162:23:127:109:55
7:18
#7450
21M
21.00 mi13:45:482:30:447:117:32
7:32
#7245
35K
21.75 mi13:51:052:36:017:105:17
7:04
#7141
23M
23.00 mi13:59:582:44:547:108:53
7:06
#6904
24M
24.00 mi14:07:062:52:027:107:08
7:08
#6759
40K
24.85 mi14:13:132:58:097:106:07
7:09
#6624
25.2M
25.20 mi14:15:563:00:527:112:43
7:53
#6577
Finish
26.22 mi14:22:533:07:497:106:57
6:49
#6433
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi7941695869588609(Top 30%)7314(Top 45%)7314(Top 130%)
10K6.21 mi3.10 mi8528-5877311-3537311-3539062(Top 32%)7636(Top 47%)7636(Top 135%)
15K9.32 mi3.11 mi8490+387279+327279+328609(Top 30%)7314(Top 45%)7314(Top 130%)
20K12.43 mi3.11 mi8246+2447101+1787101+1787710(Top 27%)6681(Top 41%)6681(Top 118%)
Half13.11 mi0.68 mi8256-107106-57106-58846(Top 31%)7368(Top 46%)7368(Top 131%)
25K15.53 mi2.42 mi8101+1556986+1206986+1207457(Top 26%)6413(Top 40%)6413(Top 114%)
30K18.64 mi3.11 mi7670+4316668+3186668+3186305(Top 22%)5524(Top 34%)5524(Top 98%)
20M20.00 mi1.36 mi7450+2206493+1756493+1755764(Top 20%)5025(Top 31%)5025(Top 89%)
21M21.00 mi1.00 mi7245+2056320+1736320+1734773(Top 17%)4207(Top 26%)4207(Top 75%)
35K21.75 mi0.75 mi7141+1046230+906230+905743(Top 20%)4879(Top 30%)4879(Top 86%)
23M23.00 mi1.25 mi6904+2376035+1956035+1954298(Top 15%)3810(Top 24%)3810(Top 68%)
24M24.00 mi1.00 mi6759+1455901+1345901+1345385(Top 19%)4519(Top 28%)4519(Top 80%)
40K24.85 mi0.85 mi6624+1355782+1195782+1194770(Top 17%)4048(Top 25%)4048(Top 72%)
25.2M25.20 mi0.35 mi6577+475736+465736+465249(Top 18%)4270(Top 27%)4270(Top 76%)
Finish26.22 mi1.02 mi6433+1445616+1205616+1204610(Top 16%)3860(Top 24%)3860(Top 68%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21story building
+97ft-345ft

Overall

8609

Males

7314

M18-39

7314

5K→10K

3.1 - 6.2 mi

Top 32%
×5story building
+79ft-138ft

Overall

9062

Males

7636

M18-39

7636

10K→15K

6.2 - 9.3 mi

Top 30%
×3story building
+67ft-78ft

Overall

8609

Males

7314

M18-39

7314

15K→20K

9.3 - 12.4 mi

Top 27%
×5story building
+106ft-86ft

Overall

7710

Males

6681

M18-39

6681

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8846

Males

7368

M18-39

7368

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

7457

Males

6413

M18-39

6413

25K→30K

15.5 - 18.6 mi

Top 22%
×9story building
+181ft-148ft

Overall

6305

Males

5524

M18-39

5524

30K→20M

18.6 - 20.0 mi

Top 20%
×5story building
+64ft-50ft

Overall

5764

Males

5025

M18-39

5025

20M→21M

20.0 - 21.0 mi

Top 17%
×8story building
+106ft-24ft

Overall

4773

Males

4207

M18-39

4207

21M→35K

21.0 - 21.8 mi

Top 20%
×7story building
+17ft-86ft

Overall

5743

Males

4879

M18-39

4879

35K→23M

21.8 - 23.0 mi

Top 15%
×5story building
+23ft-63ft

Overall

4298

Males

3810

M18-39

3810

23M→24M

23.0 - 24.0 mi

Top 19%
×6story building
+12ft-82ft

Overall

5385

Males

4519

M18-39

4519

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4770

Males

4048

M18-39

4048

40K→25.2M

24.9 - 25.2 mi

Top 18%
×1story
+13ft-16ft

Overall

5249

Males

4270

M18-39

4270

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2story building
+22ft-21ft

Overall

4610

Males

3860

M18-39

3860

Passing Analysis

Category:
Athletes Passed
2497
Passed By
989
Net Change
+1508
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7941
5K → 10K53640-587#7941#8528
10K → 15K177139+38#8528#8490
15K → 20K29147+244#8490#8246
20K → Half1727-10#8246#8256
Half → 25K21358+155#8256#8101
25K → 30K45120+431#8101#7670
30K → 20M2288+220#7670#7450
20M → 21M2094+205#7450#7245
21M → 35K1062+104#7245#7141
35K → 23M2392+237#7141#6904
23M → 24M15813+145#6904#6759
24M → 40K1394+135#6759#6624
40K → 25.2M5710+47#6624#6577
25.2M → Finish15915+144#6577#6433
TOTALS2497989+1508
📊

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