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BOSTON MARATHON 2025

Bruno Prellwitz

Bib: 4770•M

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
8:51/mi
27:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:49/mi
54:53
↑ 79↓ 1380.4%
15K· 9.32 mi
8:48/mi
1:22:13
↑ 67↓ 78
20K· 12.43 mi
8:49/mi
1:49:36
↑ 106↓ 860.1%
Half· 13.11 mi
8:11/mi
1:55:11
↑ 19↓ 370.5%
25K· 15.53 mi
9:02/mi
2:17:06
↑ 66↓ 880.2%
30K· 18.64 mi
9:37/mi
2:47:00
↑ 181↓ 1480.2%
20M
9:19/mi
2:59:40
↑ 64↓ 500.2%
21M
11:29/mi
3:11:09
↑ 106↓ 241.6%
35K· 21.75 mi
9:09/mi
3:18:00
↑ 17↓ 861.7%
23M
9:58/mi
3:30:29
↑ 23↓ 630.6%
24M
9:17/mi
3:39:46
↓ 821.3%
40K· 24.85 mi
9:48/mi
3:48:09
↓ 200.3%
25.2M
10:00/mi
3:51:36
↑ 13↓ 160.2%
Finish· 26.22 mi
8:32/mi
4:00:18
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:11
Pace8:47 /mi
2nd Half
Distance13.11 mi
Time2:05:07
Pace9:33 /mi
📊Positive Split: 8.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:35:0827:318:5127:31
8:51
-
10K
6.21 mi11:02:3054:538:5027:22
8:49
-0:02
15K
9.32 mi11:29:501:22:138:4927:20
8:48
-0:01
20K
12.43 mi11:57:131:49:368:4927:23
8:49
+0:01
Half
13.11 mi12:02:481:55:118:475:35
8:11
-0:38
25K
15.53 mi12:24:432:17:068:5021:55
9:02
+0:51
30K
18.64 mi12:54:372:47:008:5829:54
9:37
+0:35
20M
20.00 mi13:07:172:59:408:5912:40
9:19
-0:18
21M
21.00 mi13:18:463:11:099:0611:29
11:29
+2:10
35K
21.75 mi13:25:373:18:009:066:51
9:09
-2:20
23M
23.00 mi13:38:063:30:299:0912:29
9:58
+0:49
24M
24.00 mi13:47:233:39:469:099:17
9:17
-0:41
40K
24.85 mi13:55:463:48:099:118:23
9:48
+0:31
25.2M
25.20 mi13:59:133:51:369:113:27
10:00
+0:12
Finish
26.22 mi14:07:554:00:189:108:42
8:32
-1:28

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

8:11 /mi

Average Pace

9:10 /mi

Slowest Pace

11:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

14:17

6% of race

Time at Steady Pace

2:40:19

67% of race

Time at Slower Pace

1:05:42

27% of race

Average Pace: 9:10 /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 mi10:35:0827:318:5127:31
8:51
#21785
10K
6.21 mi11:02:3054:538:5027:22
8:49
#21615
15K
9.32 mi11:29:501:22:138:4927:20
8:48
#21371
20K
12.43 mi11:57:131:49:368:4927:23
8:49
#21023
Half
13.11 mi12:02:481:55:118:475:35
8:11
#20853
25K
15.53 mi12:24:432:17:068:5021:55
9:02
#20741
30K
18.64 mi12:54:372:47:008:5829:54
9:37
#20676
20M
20.00 mi13:07:172:59:408:5912:40
9:19
#20479
21M
21.00 mi13:18:463:11:099:0611:29
11:29
#20651
35K
21.75 mi13:25:373:18:009:066:51
9:09
#20592
23M
23.00 mi13:38:063:30:299:0912:29
9:58
#20598
24M
24.00 mi13:47:233:39:469:099:17
9:17
#20537
40K
24.85 mi13:55:463:48:099:118:23
9:48
#20526
25.2M
25.20 mi13:59:133:51:369:113:27
10:00
#20496
Finish
26.22 mi14:07:554:00:189:108:42
8:32
#20395
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21785132161321621003(Top 74%)12939(Top 80%)12939(Top 229%)
10K6.21 mi3.10 mi21615+17013156+6013156+6021432(Top 75%)13104(Top 81%)13104(Top 232%)
15K9.32 mi3.11 mi21371+24413080+7613080+7621003(Top 74%)12939(Top 80%)12939(Top 229%)
20K12.43 mi3.11 mi21023+34812919+16112919+16119995(Top 70%)12463(Top 77%)12463(Top 221%)
Half13.11 mi0.68 mi20853+17012843+7612843+7617178(Top 60%)11279(Top 70%)11279(Top 200%)
25K15.53 mi2.42 mi20741+11212786+5712786+5720077(Top 71%)12449(Top 77%)12449(Top 221%)
30K18.64 mi3.11 mi20676+6512706+8012706+8020439(Top 72%)12488(Top 78%)12488(Top 221%)
20M20.00 mi1.36 mi20479+19712601+10512601+10518393(Top 65%)11402(Top 71%)11402(Top 202%)
21M21.00 mi1.00 mi20651-17212663-6212663-6222579(Top 79%)13235(Top 82%)13235(Top 235%)
35K21.75 mi0.75 mi20592+5912622+4112622+4118974(Top 67%)11488(Top 71%)11488(Top 204%)
23M23.00 mi1.25 mi20598-612604+1812604+1820380(Top 72%)12095(Top 75%)12095(Top 214%)
24M24.00 mi1.00 mi20537+6112563+4112563+4118737(Top 66%)11293(Top 70%)11293(Top 200%)
40K24.85 mi0.85 mi20526+1112535+2812535+2819817(Top 70%)11716(Top 73%)11716(Top 208%)
25.2M25.20 mi0.35 mi20496+3012516+1912516+1917037(Top 60%)10402(Top 65%)10402(Top 184%)
Finish26.22 mi1.02 mi20395+10112454+6212454+6216448(Top 58%)10141(Top 63%)10141(Top 180%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21story building
+97ft-345ft

Overall

21003

Males

12939

M18-39

12939

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

21432

Males

13104

M18-39

13104

10K→15K

6.2 - 9.3 mi

Top 74%
×3story building
+67ft-78ft

Overall

21003

Males

12939

M18-39

12939

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

19995

Males

12463

M18-39

12463

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

17178

Males

11279

M18-39

11279

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

20077

Males

12449

M18-39

12449

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

20439

Males

12488

M18-39

12488

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

18393

Males

11402

M18-39

11402

20M→21M

20.0 - 21.0 mi

Top 79%
×8story building
+106ft-24ft

Overall

22579

Males

13235

M18-39

13235

21M→35K

21.0 - 21.8 mi

Top 67%
×7story building
+17ft-86ft

Overall

18974

Males

11488

M18-39

11488

35K→23M

21.8 - 23.0 mi

Top 72%
×5story building
+23ft-63ft

Overall

20380

Males

12095

M18-39

12095

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

18737

Males

11293

M18-39

11293

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

19817

Males

11716

M18-39

11716

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

17037

Males

10402

M18-39

10402

25.2M→Finish

25.2 - 26.2 mi

Top 58%
×2story building
+22ft-21ft

Overall

16448

Males

10141

M18-39

10141

Passing Analysis

Category:
Athletes Passed
2450
Passed By
1060
Net Change
+1390
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21785
5K → 10K367197+170#21785#21615
10K → 15K34399+244#21615#21371
15K → 20K39042+348#21371#21023
20K → Half1700+170#21023#20853
Half → 25K21199+112#20853#20741
25K → 30K250185+65#20741#20676
30K → 20M21114+197#20676#20479
20M → 21M45217-172#20479#20651
21M → 35K7516+59#20651#20592
35K → 23M8793-6#20592#20598
23M → 24M8726+61#20598#20537
24M → 40K6150+11#20537#20526
40K → 25.2M4111+30#20526#20496
25.2M → Finish11211+101#20496#20395
TOTALS24501060+1390
📊

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