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BOSTON MARATHON 2025

Samuel Kirshenbaum

Bib: 29349•M

FL

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

Start
0:00:00
Race begins
5K· 3.11 mi
31:48
Rank: #26158
Start → 5K
31:48 | 10:14/mi
10K· 6.21 mi
1:03:54
Rank: #26066 (+92)
5K → 10K
32:06 | 10:20/mi
15K· 9.32 mi
1:35:57
Rank: #25901 (+165)
10K → 15K
32:03 | 10:19/mi
20K· 12.43 mi
2:08:37
Rank: #25688 (+213)
15K → 20K
32:40 | 10:31/mi
Half· 13.11 mi
2:15:48
Rank: #25705 (-17)
20K → Half
7:11 | 10:32/mi
25K· 15.53 mi
2:42:05
Rank: #25583 (+122)
Half → 25K
26:17 | 10:50/mi
30K· 18.64 mi
3:19:14
Rank: #25575 (+8)
25K → 30K
37:09 | 11:57/mi
20M
3:35:42
Rank: #25552 (+23)
30K → 20M
16:28 | 12:07/mi
21M
3:47:59
Rank: #25485 (+67)
20M → 21M
12:17 | 12:17/mi
35K· 21.75 mi
3:56:26
Rank: #25462 (+23)
21M → 35K
8:27 | 11:18/mi
23M
4:11:18
Rank: #25430 (+32)
35K → 23M
14:52 | 11:52/mi
24M
4:22:47
Rank: #25417 (+13)
23M → 24M
11:29 | 11:29/mi
40K· 24.85 mi
4:32:16
Rank: #25346 (+71)
24M → 40K
9:29 | 11:05/mi
25.2M
4:36:21
Rank: #25317 (+29)
40K → 25.2M
4:05 | 11:50/mi
Finish· 26.22 mi
4:46:23
Rank: #25258 (+59)
25.2M → Finish
10:02 | 9:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:15:48
Pace10:22 /mi
2nd Half
Distance13.11 mi
Time2:30:35
Pace11:29 /mi
📊Positive Split: 10.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:2631:4810:1431:48
10:14
-
10K
6.21 mi12:22:321:03:5410:1732:06
10:20
+0:06
15K
9.32 mi12:54:351:35:5710:1832:03
10:19
-0:01
20K
12.43 mi13:27:152:08:3710:2132:40
10:31
+0:12
Half
13.11 mi13:34:262:15:4810:227:11
10:32
+0:01
25K
15.53 mi14:00:432:42:0510:2626:17
10:50
+0:18
30K
18.64 mi14:37:523:19:1410:4137:09
11:57
+1:07
20M
20.00 mi14:54:203:35:4210:4716:28
12:07
+0:10
21M
21.00 mi15:06:373:47:5910:5112:17
12:17
+0:10
35K
21.75 mi15:15:043:56:2610:528:27
11:18
-0:59
23M
23.00 mi15:29:564:11:1810:5614:52
11:52
+0:34
24M
24.00 mi15:41:254:22:4710:5711:29
11:29
-0:23
40K
24.85 mi15:50:544:32:1610:579:29
11:05
-0:24
25.2M
25.20 mi15:54:594:36:2110:584:05
11:50
+0:45
Finish
26.22 mi16:05:014:46:2310:5610:02
9:51
-1:59

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

9:51 /mi

Average Pace

10:56 /mi

Slowest Pace

12:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:25:50

51% of race

Time at Steady Pace

44:13

15% of race

Time at Slower Pace

1:36:20

34% of race

Average Pace: 10:55 /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 mi11:50:2631:4810:1431:48
10:14
#26158
10K
6.21 mi12:22:321:03:5410:1732:06
10:20
#26066
15K
9.32 mi12:54:351:35:5710:1832:03
10:19
#25901
20K
12.43 mi13:27:152:08:3710:2132:40
10:31
#25688
Half
13.11 mi13:34:262:15:4810:227:11
10:32
#25705
25K
15.53 mi14:00:432:42:0510:2626:17
10:50
#25583
30K
18.64 mi14:37:523:19:1410:4137:09
11:57
#25575
20M
20.00 mi14:54:203:35:4210:4716:28
12:07
#25552
21M
21.00 mi15:06:373:47:5910:5112:17
12:17
#25485
35K
21.75 mi15:15:043:56:2610:528:27
11:18
#25462
23M
23.00 mi15:29:564:11:1810:5614:52
11:52
#25430
24M
24.00 mi15:41:254:22:4710:5711:29
11:29
#25417
40K
24.85 mi15:50:544:32:1610:579:29
11:05
#25346
25.2M
25.20 mi15:54:594:36:2110:584:05
11:50
#25317
Finish
26.22 mi16:05:014:46:2310:5610:02
9:51
#25258
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi26158152441524425619(Top 90%)14984(Top 93%)14984(Top 266%)
10K6.21 mi3.10 mi26066+9215191+5315191+5325976(Top 91%)15134(Top 94%)15134(Top 268%)
15K9.32 mi3.11 mi25901+16515114+7715114+7725619(Top 90%)14984(Top 93%)14984(Top 266%)
20K12.43 mi3.11 mi25688+21315015+9915015+9925206(Top 89%)14764(Top 92%)14764(Top 262%)
Half13.11 mi0.68 mi25705-1715021-615021-625830(Top 91%)15029(Top 93%)15029(Top 266%)
25K15.53 mi2.42 mi25583+12214956+6514956+6524967(Top 88%)14634(Top 91%)14634(Top 259%)
30K18.64 mi3.11 mi25575+814904+5214904+5225537(Top 90%)14775(Top 92%)14775(Top 262%)
20M20.00 mi1.36 mi25552+2314889+1514889+1525432(Top 90%)14650(Top 91%)14650(Top 260%)
21M21.00 mi1.00 mi25485+6714844+4514844+4524069(Top 85%)13945(Top 87%)13945(Top 247%)
35K21.75 mi0.75 mi25462+2314824+2014824+2024770(Top 87%)14247(Top 88%)14247(Top 253%)
23M23.00 mi1.25 mi25430+3214794+3014794+3024925(Top 88%)14300(Top 89%)14300(Top 253%)
24M24.00 mi1.00 mi25417+1314781+1314781+1324871(Top 88%)14241(Top 88%)14241(Top 252%)
40K24.85 mi0.85 mi25346+7114749+3214749+3223338(Top 82%)13419(Top 83%)13419(Top 238%)
25.2M25.20 mi0.35 mi25317+2914730+1914730+1922897(Top 81%)13240(Top 82%)13240(Top 235%)
Finish26.22 mi1.02 mi25258+5914695+3514695+3522448(Top 79%)13000(Top 81%)13000(Top 230%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 90%
×21stories
+97ft-345ft

Overall

25619

Males

14984

M18-39

14984

5K→10K

3.1 - 6.2 mi

Top 91%
×5stories
+79ft-138ft

Overall

25976

Males

15134

M18-39

15134

10K→15K

6.2 - 9.3 mi

Top 90%
×3stories
+67ft-78ft

Overall

25619

Males

14984

M18-39

14984

15K→20K

9.3 - 12.4 mi

Top 89%
×5stories
+106ft-86ft

Overall

25206

Males

14764

M18-39

14764

20K→Half

12.4 - 13.1 mi

Top 91%
×2stories
+19ft-37ft

Overall

25830

Males

15029

M18-39

15029

Half→25K

13.1 - 15.5 mi

Top 88%
×4stories
+66ft-88ft

Overall

24967

Males

14634

M18-39

14634

25K→30K

15.5 - 18.6 mi

Top 90%
×9stories
+181ft-148ft

Overall

25537

Males

14775

M18-39

14775

30K→20M

18.6 - 20.0 mi

Top 90%
×5stories
+64ft-50ft

Overall

25432

Males

14650

M18-39

14650

20M→21M

20.0 - 21.0 mi

Top 85%
×8stories
+106ft-24ft

Overall

24069

Males

13945

M18-39

13945

21M→35K

21.0 - 21.8 mi

Top 87%
×7stories
+17ft-86ft

Overall

24770

Males

14247

M18-39

14247

35K→23M

21.8 - 23.0 mi

Top 88%
×5stories
+23ft-63ft

Overall

24925

Males

14300

M18-39

14300

23M→24M

23.0 - 24.0 mi

Top 88%
×6stories
+12ft-82ft

Overall

24871

Males

14241

M18-39

14241

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

23338

Males

13419

M18-39

13419

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

22897

Males

13240

M18-39

13240

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2stories
+22ft-21ft

Overall

22448

Males

13000

M18-39

13000

Passing Analysis

Category:
Athletes Passed
1413
Passed By
513
Net Change
+900
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26158
5K → 10K212120+92#26158#26066
10K → 15K21550+165#26066#25901
15K → 20K23825+213#25901#25688
20K → Half926-17#25688#25705
Half → 25K16846+122#25705#25583
25K → 30K126118+8#25583#25575
30K → 20M6239+23#25575#25552
20M → 21M7811+67#25552#25485
21M → 35K329+23#25485#25462
35K → 23M6028+32#25462#25430
23M → 24M4330+13#25430#25417
24M → 40K765+71#25417#25346
40K → 25.2M301+29#25346#25317
25.2M → Finish645+59#25317#25258
TOTALS1413513+900
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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