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BOSTON MARATHON 2025

Pier Kemnitzer

Bib: 31793•M

WI

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
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
10:14/mi
31:49
↑ 97↓ 3451.5%
10K· 6.21 mi
10:31/mi
1:04:29
↑ 79↓ 1380.4%
15K· 9.32 mi
11:45/mi
1:40:59
↑ 67↓ 78
20K· 12.43 mi
11:40/mi
2:17:14
↑ 106↓ 860.1%
Half· 13.11 mi
11:20/mi
2:24:58
↑ 19↓ 370.5%
25K· 15.53 mi
13:42/mi
2:58:10
↑ 66↓ 880.2%
30K· 18.64 mi
15:04/mi
3:44:58
↑ 181↓ 1480.2%
20M
15:04/mi
4:05:26
↑ 64↓ 500.2%
21M
15:57/mi
4:21:23
↑ 106↓ 241.6%
35K· 21.75 mi
13:49/mi
4:31:43
↑ 17↓ 861.7%
23M
14:41/mi
4:50:06
↑ 23↓ 630.6%
24M
14:25/mi
5:04:31
↓ 821.3%
40K· 24.85 mi
16:14/mi
5:18:24
↓ 200.3%
25.2M
16:55/mi
5:24:14
↑ 13↓ 160.2%
Finish· 26.22 mi
13:51/mi
5:38:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:24:58
Pace11:03 /mi
2nd Half
Distance13.11 mi
Time3:13:23
Pace14:45 /mi
📊Positive Split: 33.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:1131:4910:1431:49
10:14
-
10K
6.21 mi12:27:511:04:2910:2332:40
10:31
+0:17
15K
9.32 mi13:04:211:40:5910:5036:30
11:45
+1:14
20K
12.43 mi13:40:362:17:1411:0336:15
11:40
-0:05
Half
13.11 mi13:48:202:24:5811:037:44
11:20
-0:20
25K
15.53 mi14:21:322:58:1011:2833:12
13:42
+2:22
30K
18.64 mi15:08:203:44:5812:0446:48
15:04
+1:22
20M
20.00 mi15:28:484:05:2612:1620:28
15:04
0:00
21M
21.00 mi15:44:454:21:2312:2715:57
15:57
+0:53
35K
21.75 mi15:55:054:31:4312:3010:20
13:49
-2:08
23M
23.00 mi16:13:284:50:0612:3718:23
14:41
+0:52
24M
24.00 mi16:27:535:04:3112:4114:25
14:25
-0:16
40K
24.85 mi16:41:465:18:2412:4913:53
16:14
+1:49
25.2M
25.20 mi16:47:365:24:1412:525:50
16:55
+0:41
Finish
26.22 mi17:01:435:38:2112:5514:07
13:51
-3:04

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

10:14 /mi

Average Pace

12:55 /mi

Slowest Pace

16:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:24:58

43% of race

Time at Steady Pace

1:30:27

27% of race

Time at Slower Pace

1:42:56

30% of race

Average Pace: 12:54 /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 mi11:55:1131:4910:1431:49
10:14
#26172
10K
6.21 mi12:27:511:04:2910:2332:40
10:31
#26241
15K
9.32 mi13:04:211:40:5910:5036:30
11:45
#26846
20K
12.43 mi13:40:362:17:1411:0336:15
11:40
#26838
Half
13.11 mi13:48:202:24:5811:037:44
11:20
#26851
25K
15.53 mi14:21:322:58:1011:2833:12
13:42
#27093
30K
18.64 mi15:08:203:44:5812:0446:48
15:04
#27365
20M
20.00 mi15:28:484:05:2612:1620:28
15:04
#27434
21M
21.00 mi15:44:454:21:2312:2715:57
15:57
#27467
35K
21.75 mi15:55:054:31:4312:3010:20
13:49
#27485
23M
23.00 mi16:13:284:50:0612:3718:23
14:41
#27525
24M
24.00 mi16:27:535:04:3112:4114:25
14:25
#27562
40K
24.85 mi16:41:465:18:2412:4913:53
16:14
#27614
25.2M
25.20 mi16:47:365:24:1412:525:50
16:55
#27633
Finish
26.22 mi17:01:435:38:2112:5514:07
13:51
#27677
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi26172152501525027442(Top 97%)15728(Top 98%)15728(Top 279%)
10K6.21 mi3.10 mi26241-6915273-2315273-2326298(Top 93%)15276(Top 95%)15276(Top 271%)
15K9.32 mi3.11 mi26846-60515516-24315516-24327442(Top 97%)15728(Top 98%)15728(Top 279%)
20K12.43 mi3.11 mi26838+815507+915507+926812(Top 94%)15465(Top 96%)15465(Top 274%)
Half13.11 mi0.68 mi26851-1315508-115508-126912(Top 95%)15486(Top 96%)15486(Top 274%)
25K15.53 mi2.42 mi27093-24215590-8215590-8227731(Top 98%)15811(Top 98%)15811(Top 280%)
30K18.64 mi3.11 mi27365-27215671-8115671-8128057(Top 99%)15904(Top 99%)15904(Top 282%)
20M20.00 mi1.36 mi27434-6915699-2815699-2827899(Top 98%)15821(Top 98%)15821(Top 280%)
21M21.00 mi1.00 mi27467-3315704-515704-527783(Top 98%)15769(Top 98%)15769(Top 279%)
35K21.75 mi0.75 mi27485-1815709-515709-527585(Top 97%)15619(Top 97%)15619(Top 277%)
23M23.00 mi1.25 mi27525-4015721-1215721-1227757(Top 98%)15706(Top 98%)15706(Top 278%)
24M24.00 mi1.00 mi27562-3715732-1115732-1127840(Top 98%)15731(Top 98%)15731(Top 279%)
40K24.85 mi0.85 mi27614-5215743-1115743-1128145(Top 99%)15927(Top 99%)15927(Top 282%)
25.2M25.20 mi0.35 mi27633-1915752-915752-928044(Top 99%)15848(Top 98%)15848(Top 281%)
Finish26.22 mi1.02 mi27677-4415762-1015762-1027992(Top 99%)15835(Top 98%)15835(Top 281%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21story building
+97ft-345ft

Overall

27442

Males

15728

M18-39

15728

5K→10K

3.1 - 6.2 mi

Top 93%
×5story building
+79ft-138ft

Overall

26298

Males

15276

M18-39

15276

10K→15K

6.2 - 9.3 mi

Top 97%
×3story building
+67ft-78ft

Overall

27442

Males

15728

M18-39

15728

15K→20K

9.3 - 12.4 mi

Top 94%
×5story building
+106ft-86ft

Overall

26812

Males

15465

M18-39

15465

20K→Half

12.4 - 13.1 mi

Top 95%
×2story building
+19ft-37ft

Overall

26912

Males

15486

M18-39

15486

Half→25K

13.1 - 15.5 mi

Top 98%
×4story building
+66ft-88ft

Overall

27731

Males

15811

M18-39

15811

25K→30K

15.5 - 18.6 mi

Top 99%
×9story building
+181ft-148ft

Overall

28057

Males

15904

M18-39

15904

30K→20M

18.6 - 20.0 mi

Top 98%
×5story building
+64ft-50ft

Overall

27899

Males

15821

M18-39

15821

20M→21M

20.0 - 21.0 mi

Top 98%
×8story building
+106ft-24ft

Overall

27783

Males

15769

M18-39

15769

21M→35K

21.0 - 21.8 mi

Top 97%
×7story building
+17ft-86ft

Overall

27585

Males

15619

M18-39

15619

35K→23M

21.8 - 23.0 mi

Top 98%
×5story building
+23ft-63ft

Overall

27757

Males

15706

M18-39

15706

23M→24M

23.0 - 24.0 mi

Top 98%
×6story building
+12ft-82ft

Overall

27840

Males

15731

M18-39

15731

24M→40K

24.0 - 24.9 mi

Top 99%
×1story
+6ft-20ft

Overall

28145

Males

15927

M18-39

15927

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

28044

Males

15848

M18-39

15848

25.2M→Finish

25.2 - 26.2 mi

Top 99%
×2story building
+22ft-21ft

Overall

27992

Males

15835

M18-39

15835

Passing Analysis

Category:
Athletes Passed
362
Passed By
1867
Net Change
-1505
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26172
5K → 10K140209-69#26172#26241
10K → 15K16621-605#26241#26846
15K → 20K10597+8#26846#26838
20K → Half1124-13#26838#26851
Half → 25K12254-242#26851#27093
25K → 30K23295-272#27093#27365
30K → 20M1180-69#27365#27434
20M → 21M1346-33#27434#27467
21M → 35K725-18#27467#27485
35K → 23M848-40#27485#27525
23M → 24M643-37#27525#27562
24M → 40K456-52#27562#27614
40K → 25.2M221-19#27614#27633
25.2M → Finish448-44#27633#27677
TOTALS3621867-1505
📊

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