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BOSTON MARATHON 2025

Seth Kampf

Bib: 1975•M

PA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 3%
Gender (Male)
#0 / 16105
Top 4%
Masters (Masters Men)
#0 / 10463
Top 0.9%
Division (M40-44)
#0 / 2247
Top 3%
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
5:57/mi
18:29
↑ 97↓ 3451.5%
10K· 6.21 mi
5:54/mi
36:48
↑ 79↓ 1380.4%
15K· 9.32 mi
5:51/mi
55:00
↑ 67↓ 78
20K· 12.43 mi
5:55/mi
1:13:23
↑ 106↓ 860.1%
Half· 13.11 mi
5:49/mi
1:17:21
↑ 19↓ 370.5%
25K· 15.53 mi
5:58/mi
1:31:49
↑ 66↓ 880.2%
30K· 18.64 mi
6:08/mi
1:50:52
↑ 181↓ 1480.2%
20M
6:14/mi
1:59:20
↑ 64↓ 500.2%
21M
6:43/mi
2:06:03
↑ 106↓ 241.6%
35K· 21.75 mi
5:57/mi
2:10:30
↑ 17↓ 861.7%
23M
6:19/mi
2:18:25
↑ 23↓ 630.6%
24M
6:18/mi
2:24:43
↓ 821.3%
40K· 24.85 mi
6:36/mi
2:30:22
↓ 200.3%
25.2M
7:15/mi
2:32:52
↑ 13↓ 160.2%
Finish· 26.22 mi
6:25/mi
2:39:24
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:17:21
Pace5:54 /mi
2nd Half
Distance13.11 mi
Time1:22:03
Pace6:16 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:5418:295:5718:29
5:57
-
10K
6.21 mi10:37:1336:485:5518:19
5:54
-0:03
15K
9.32 mi10:55:2555:005:5418:12
5:51
-0:03
20K
12.43 mi11:13:481:13:235:5418:23
5:55
+0:04
Half
13.11 mi11:17:461:17:215:543:58
5:49
-0:06
25K
15.53 mi11:32:141:31:495:5514:28
5:58
+0:09
30K
18.64 mi11:51:171:50:525:5719:03
6:08
+0:10
20M
20.00 mi11:59:451:59:205:588:28
6:14
+0:06
21M
21.00 mi12:06:282:06:036:006:43
6:43
+0:29
35K
21.75 mi12:10:552:10:306:004:27
5:57
-0:46
23M
23.00 mi12:18:502:18:256:017:55
6:19
+0:22
24M
24.00 mi12:25:082:24:436:026:18
6:18
-0:01
40K
24.85 mi12:30:472:30:226:035:39
6:36
+0:18
25.2M
25.20 mi12:33:172:32:526:042:30
7:15
+0:39
Finish
26.22 mi12:39:492:39:246:056:32
6:25
-0:50

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

5:49 /mi

Average Pace

6:05 /mi

Slowest Pace

7:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

58:52

37% of race

Time at Steady Pace

1:19:08

50% of race

Time at Slower Pace

21:24

13% of race

Average Pace: 6:05 /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 mi10:18:5418:295:5718:29
5:57
#923
10K
6.21 mi10:37:1336:485:5518:19
5:54
#867
15K
9.32 mi10:55:2555:005:5418:12
5:51
#791
20K
12.43 mi11:13:481:13:235:5418:23
5:55
#748
Half
13.11 mi11:17:461:17:215:543:58
5:49
#738
25K
15.53 mi11:32:141:31:495:5514:28
5:58
#725
30K
18.64 mi11:51:171:50:525:5719:03
6:08
#704
20M
20.00 mi11:59:451:59:205:588:28
6:14
#696
21M
21.00 mi12:06:282:06:036:006:43
6:43
#705
35K
21.75 mi12:10:552:10:306:004:27
5:57
#689
23M
23.00 mi12:18:502:18:256:017:55
6:19
#687
24M
24.00 mi12:25:082:24:436:026:18
6:18
#695
40K
24.85 mi12:30:472:30:226:035:39
6:36
#709
25.2M
25.20 mi12:33:172:32:526:042:30
7:15
#712
Finish
26.22 mi12:39:492:39:246:056:32
6:25
#752
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi923865865642(Top 2%)596(Top 4%)596(Top 27%)
10K6.21 mi3.10 mi867+56813+52813+52810(Top 3%)759(Top 5%)759(Top 34%)
15K9.32 mi3.11 mi791+76740+73740+73642(Top 2%)596(Top 4%)596(Top 27%)
20K12.43 mi3.11 mi748+43699+41699+41666(Top 2%)619(Top 4%)619(Top 28%)
Half13.11 mi0.68 mi738+10689+10689+10620(Top 2%)581(Top 4%)581(Top 26%)
25K15.53 mi2.42 mi725+13677+12677+12719(Top 3%)671(Top 4%)671(Top 30%)
30K18.64 mi3.11 mi704+21657+20657+20751(Top 3%)703(Top 4%)703(Top 31%)
20M20.00 mi1.36 mi696+8649+8649+8793(Top 3%)748(Top 5%)748(Top 33%)
21M21.00 mi1.00 mi705-9658-9658-91229(Top 4%)1159(Top 7%)1159(Top 52%)
35K21.75 mi0.75 mi689+16642+16642+16616(Top 2%)575(Top 4%)575(Top 26%)
23M23.00 mi1.25 mi687+2639+3639+3927(Top 3%)872(Top 5%)872(Top 39%)
24M24.00 mi1.00 mi695-8646-7646-71294(Top 5%)1209(Top 8%)1209(Top 54%)
40K24.85 mi0.85 mi709-14660-14660-141967(Top 7%)1810(Top 11%)1810(Top 81%)
25.2M25.20 mi0.35 mi712-3663-3663-32256(Top 8%)2009(Top 12%)2009(Top 89%)
Finish26.22 mi1.02 mi752-40701-38701-382333(Top 8%)2125(Top 13%)2125(Top 95%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21story building
+97ft-345ft

Overall

642

Males

596

M40-44

596

5K→10K

3.1 - 6.2 mi

Top 3%
×5story building
+79ft-138ft

Overall

810

Males

759

M40-44

759

10K→15K

6.2 - 9.3 mi

Top 2%
×3story building
+67ft-78ft

Overall

642

Males

596

M40-44

596

15K→20K

9.3 - 12.4 mi

Top 2%
×5story building
+106ft-86ft

Overall

666

Males

619

M40-44

619

20K→Half

12.4 - 13.1 mi

Top 2%
×2story building
+19ft-37ft

Overall

620

Males

581

M40-44

581

Half→25K

13.1 - 15.5 mi

Top 3%
×4story building
+66ft-88ft

Overall

719

Males

671

M40-44

671

25K→30K

15.5 - 18.6 mi

Top 3%
×9story building
+181ft-148ft

Overall

751

Males

703

M40-44

703

30K→20M

18.6 - 20.0 mi

Top 3%
×5story building
+64ft-50ft

Overall

793

Males

748

M40-44

748

20M→21M

20.0 - 21.0 mi

Top 4%
×8story building
+106ft-24ft

Overall

1229

Males

1159

M40-44

1159

21M→35K

21.0 - 21.8 mi

Top 2%
×7story building
+17ft-86ft

Overall

616

Males

575

M40-44

575

35K→23M

21.8 - 23.0 mi

Top 3%
×5story building
+23ft-63ft

Overall

927

Males

872

M40-44

872

23M→24M

23.0 - 24.0 mi

Top 5%
×6story building
+12ft-82ft

Overall

1294

Males

1209

M40-44

1209

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

1967

Males

1810

M40-44

1810

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2256

Males

2009

M40-44

2009

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2story building
+22ft-21ft

Overall

2333

Males

2125

M40-44

2125

Passing Analysis

Category:
Athletes Passed
386
Passed By
215
Net Change
+171
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#923
5K → 10K8024+56#923#867
10K → 15K793+76#867#791
15K → 20K507+43#791#748
20K → Half111+10#748#738
Half → 25K2815+13#738#725
25K → 30K4322+21#725#704
30K → 20M2113+8#704#696
20M → 21M1120-9#696#705
21M → 35K215+16#705#689
35K → 23M1614+2#689#687
23M → 24M816-8#687#695
24M → 40K721-14#695#709
40K → 25.2M47-3#709#712
25.2M → Finish747-40#712#752
TOTALS386215+171
📊

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