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BOSTON MARATHON 2025

Isaac Bernstein

Bib: 2776•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 46%
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
20:15
Rank: #3972
Start → 5K
20:15 | 6:31/mi
10K· 6.21 mi
40:07
Rank: #3455 (+517)
5K → 10K
19:52 | 6:24/mi
15K· 9.32 mi
59:45
Rank: #3082 (+373)
10K → 15K
19:38 | 6:19/mi
20K· 12.43 mi
1:20:36
Rank: #3407 (-325)
15K → 20K
20:51 | 6:43/mi
Half· 13.11 mi
1:25:06
Rank: #3446 (-39)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:47:44
Rank: #6836 (-3390)
Half → 25K
22:38 | 9:20/mi
30K· 18.64 mi
2:19:16
Rank: #10321 (-3485)
25K → 30K
31:32 | 10:09/mi
20M
2:33:04
Rank: #11501 (-1180)
30K → 20M
13:48 | 10:09/mi
21M
2:41:55
Rank: #11569 (-68)
20M → 21M
8:51 | 8:51/mi
35K· 21.75 mi
2:47:26
Rank: #11382 (+187)
21M → 35K
5:31 | 7:22/mi
23M
3:00:37
Rank: #12369 (-987)
35K → 23M
13:11 | 10:32/mi
24M
3:09:40
Rank: #12665 (-296)
23M → 24M
9:03 | 9:03/mi
40K· 24.85 mi
3:18:29
Rank: #13161 (-496)
24M → 40K
8:49 | 10:19/mi
25.2M
3:22:05
Rank: #13264 (-103)
40K → 25.2M
3:36 | 10:26/mi
Finish· 26.22 mi
3:29:57
Rank: #13200 (+64)
25.2M → Finish
7:52 | 7:43/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:06
Pace6:29 /mi
2nd Half
Distance13.11 mi
Time2:04:51
Pace9:31 /mi
📊Positive Split: 46.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:5520:156:3120:15
6:31
-
10K
6.21 mi10:41:4740:076:2719:52
6:24
-0:07
15K
9.32 mi11:01:2559:456:2519:38
6:19
-0:05
20K
12.43 mi11:22:161:20:366:2920:51
6:43
+0:24
Half
13.11 mi11:26:461:25:066:294:30
6:36
-0:07
25K
15.53 mi11:49:241:47:446:5622:38
9:20
+2:44
30K
18.64 mi12:20:562:19:167:2831:32
10:09
+0:49
20M
20.00 mi12:34:442:33:047:3913:48
10:09
0:00
21M
21.00 mi12:43:352:41:557:438:51
8:51
-1:18
35K
21.75 mi12:49:062:47:267:425:31
7:22
-1:29
23M
23.00 mi13:02:173:00:377:5113:11
10:32
+3:10
24M
24.00 mi13:11:203:09:407:549:03
9:03
-1:29
40K
24.85 mi13:20:093:18:297:598:49
10:19
+1:16
25.2M
25.20 mi13:23:453:22:058:013:36
10:26
+0:07
Finish
26.22 mi13:31:373:29:578:017:52
7:43
-2:43

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

6:19 /mi

Average Pace

8:01 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:29

47% of race

Time at Steady Pace

40:32

19% of race

Time at Slower Pace

1:10:56

34% of race

Average Pace: 8:00 /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 mi10:21:5520:156:3120:15
6:31
#3972
10K
6.21 mi10:41:4740:076:2719:52
6:24
#3455
15K
9.32 mi11:01:2559:456:2519:38
6:19
#3082
20K
12.43 mi11:22:161:20:366:2920:51
6:43
#3407
Half
13.11 mi11:26:461:25:066:294:30
6:36
#3446
25K
15.53 mi11:49:241:47:446:5622:38
9:20
#6836
30K
18.64 mi12:20:562:19:167:2831:32
10:09
#10321
20M
20.00 mi12:34:442:33:047:3913:48
10:09
#11501
21M
21.00 mi12:43:352:41:557:438:51
8:51
#11569
35K
21.75 mi12:49:062:47:267:425:31
7:22
#11382
23M
23.00 mi13:02:173:00:377:5113:11
10:32
#12369
24M
24.00 mi13:11:203:09:407:549:03
9:03
#12665
40K
24.85 mi13:20:093:18:297:598:49
10:19
#13161
25.2M
25.20 mi13:23:453:22:058:013:36
10:26
#13264
Finish
26.22 mi13:31:373:29:578:017:52
7:43
#13200
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3972375937592468(Top 9%)2357(Top 15%)2357(Top 42%)
10K6.21 mi3.10 mi3455+5173281+4783281+4783025(Top 11%)2881(Top 18%)2881(Top 51%)
15K9.32 mi3.11 mi3082+3732935+3462935+3462468(Top 9%)2357(Top 15%)2357(Top 42%)
20K12.43 mi3.11 mi3407-3253233-2983233-2984545(Top 16%)4232(Top 26%)4232(Top 75%)
Half13.11 mi0.68 mi3446-393266-333266-334445(Top 16%)4167(Top 26%)4167(Top 74%)
25K15.53 mi2.42 mi6836-33906123-28576123-285721305(Top 75%)12986(Top 81%)12986(Top 230%)
30K18.64 mi3.11 mi10321-34858184-20618184-206122054(Top 78%)13194(Top 82%)13194(Top 234%)
20M20.00 mi1.36 mi11501-11808699-5158699-51521431(Top 75%)12779(Top 79%)12779(Top 226%)
21M21.00 mi1.00 mi11569-688689+108689+1012591(Top 44%)8639(Top 54%)8639(Top 153%)
35K21.75 mi0.75 mi11382+1878576+1138576+1137738(Top 27%)6155(Top 38%)6155(Top 109%)
23M23.00 mi1.25 mi12369-9879007-4319007-43122080(Top 78%)12914(Top 80%)12914(Top 229%)
24M24.00 mi1.00 mi12665-2969128-1219128-12117588(Top 62%)10728(Top 67%)10728(Top 190%)
40K24.85 mi0.85 mi13161-4969308-1809308-18021388(Top 75%)12460(Top 77%)12460(Top 221%)
25.2M25.20 mi0.35 mi13264-1039338-309338-3018721(Top 66%)11165(Top 69%)11165(Top 198%)
Finish26.22 mi1.02 mi13200+649293+459293+4510846(Top 38%)7438(Top 46%)7438(Top 132%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21stories
+97ft-345ft

Overall

2468

Males

2357

M18-39

2357

5K→10K

3.1 - 6.2 mi

Top 11%
×5stories
+79ft-138ft

Overall

3025

Males

2881

M18-39

2881

10K→15K

6.2 - 9.3 mi

Top 9%
×3stories
+67ft-78ft

Overall

2468

Males

2357

M18-39

2357

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4545

Males

4232

M18-39

4232

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4445

Males

4167

M18-39

4167

Half→25K

13.1 - 15.5 mi

Top 75%
×4stories
+66ft-88ft

Overall

21305

Males

12986

M18-39

12986

25K→30K

15.5 - 18.6 mi

Top 78%
×9stories
+181ft-148ft

Overall

22054

Males

13194

M18-39

13194

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

21431

Males

12779

M18-39

12779

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

12591

Males

8639

M18-39

8639

21M→35K

21.0 - 21.8 mi

Top 27%
×7stories
+17ft-86ft

Overall

7738

Males

6155

M18-39

6155

35K→23M

21.8 - 23.0 mi

Top 78%
×5stories
+23ft-63ft

Overall

22080

Males

12914

M18-39

12914

23M→24M

23.0 - 24.0 mi

Top 62%
×6stories
+12ft-82ft

Overall

17588

Males

10728

M18-39

10728

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

21388

Males

12460

M18-39

12460

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

18721

Males

11165

M18-39

11165

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2stories
+22ft-21ft

Overall

10846

Males

7438

M18-39

7438

Passing Analysis

Category:
Athletes Passed
1408
Passed By
10634
Net Change
-9228
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3972
5K → 10K53518+517#3972#3455
10K → 15K3752+373#3455#3082
15K → 20K29354-325#3082#3407
20K → Half544-39#3407#3446
Half → 25K03390-3390#3446#6836
25K → 30K53488-3485#6836#10321
30K → 20M171197-1180#10321#11501
20M → 21M86154-68#11501#11569
21M → 35K1925+187#11569#11382
35K → 23M171004-987#11382#12369
23M → 24M20316-296#12369#12665
24M → 40K17513-496#12665#13161
40K → 25.2M14117-103#13161#13264
25.2M → Finish9632+64#13264#13200
TOTALS140810634-9228
📊

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