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BOSTON MARATHON 2025

Josh Kahn

Bib: 7052•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 32%
Gender (Male)
#0 / 16105
Top 45%
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
21:59
Rank: #8420
Start → 5K
21:59 | 7:05/mi
10K· 6.21 mi
43:26
Rank: #7773 (+647)
5K → 10K
21:27 | 6:54/mi
15K· 9.32 mi
1:04:53
Rank: #7508 (+265)
10K → 15K
21:27 | 6:54/mi
20K· 12.43 mi
1:26:56
Rank: #7468 (+40)
15K → 20K
22:03 | 7:06/mi
Half· 13.11 mi
1:31:36
Rank: #7406 (+62)
20K → Half
4:40 | 6:50/mi
25K· 15.53 mi
1:49:21
Rank: #7511 (-105)
Half → 25K
17:45 | 7:19/mi
30K· 18.64 mi
2:13:39
Rank: #7825 (-314)
25K → 30K
24:18 | 7:49/mi
20M
2:24:47
Rank: #8050 (-225)
30K → 20M
11:08 | 8:12/mi
21M
2:33:36
Rank: #8256 (-206)
20M → 21M
8:49 | 8:49/mi
35K· 21.75 mi
2:39:42
Rank: #8413 (-157)
21M → 35K
6:06 | 8:09/mi
23M
2:50:06
Rank: #8596 (-183)
35K → 23M
10:24 | 8:18/mi
24M
2:58:23
Rank: #8828 (-232)
23M → 24M
8:17 | 8:17/mi
40K· 24.85 mi
3:05:41
Rank: #8979 (-151)
24M → 40K
7:18 | 8:32/mi
25.2M
3:08:37
Rank: #8963 (+16)
40K → 25.2M
2:56 | 8:30/mi
Finish· 26.22 mi
3:16:46
Rank: #9115 (-152)
25.2M → Finish
8:09 | 8:00/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:31:36
Pace6:59 /mi
2nd Half
Distance13.11 mi
Time1:45:10
Pace8:01 /mi
📊Positive Split: 14.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:30:3321:597:0521:59
7:05
-
10K
6.21 mi10:52:0043:266:5921:27
6:54
-0:11
15K
9.32 mi11:13:271:04:536:5821:27
6:54
0:00
20K
12.43 mi11:35:301:26:567:0022:03
7:06
+0:12
Half
13.11 mi11:40:101:31:366:594:40
6:50
-0:16
25K
15.53 mi11:57:551:49:217:0217:45
7:19
+0:29
30K
18.64 mi12:22:132:13:397:1024:18
7:49
+0:30
20M
20.00 mi12:33:212:24:477:1411:08
8:12
+0:23
21M
21.00 mi12:42:102:33:367:198:49
8:49
+0:37
35K
21.75 mi12:48:162:39:427:216:06
8:09
-0:40
23M
23.00 mi12:58:402:50:067:2410:24
8:18
+0:09
24M
24.00 mi13:06:572:58:237:268:17
8:17
-0:01
40K
24.85 mi13:14:153:05:417:287:18
8:32
+0:15
25.2M
25.20 mi13:17:113:08:377:292:56
8:30
-0:02
Finish
26.22 mi13:25:203:16:467:318:09
8:00
-0:30

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

6:50 /mi

Average Pace

7:31 /mi

Slowest Pace

8:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:49:21

56% of race

Time at Steady Pace

1:08:22

35% of race

Time at Slower Pace

19:03

10% of race

Average Pace: 7:30 /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 mi10:30:3321:597:0521:59
7:05
#8420
10K
6.21 mi10:52:0043:266:5921:27
6:54
#7773
15K
9.32 mi11:13:271:04:536:5821:27
6:54
#7508
20K
12.43 mi11:35:301:26:567:0022:03
7:06
#7468
Half
13.11 mi11:40:101:31:366:594:40
6:50
#7406
25K
15.53 mi11:57:551:49:217:0217:45
7:19
#7511
30K
18.64 mi12:22:132:13:397:1024:18
7:49
#7825
20M
20.00 mi12:33:212:24:477:1411:08
8:12
#8050
21M
21.00 mi12:42:102:33:367:198:49
8:49
#8256
35K
21.75 mi12:48:162:39:427:216:06
8:09
#8413
23M
23.00 mi12:58:402:50:067:2410:24
8:18
#8596
24M
24.00 mi13:06:572:58:237:268:17
8:17
#8828
40K
24.85 mi13:14:153:05:417:287:18
8:32
#8979
25.2M
25.20 mi13:17:113:08:377:292:56
8:30
#8963
Finish
26.22 mi13:25:203:16:467:318:09
8:00
#9115
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi8420726172616989(Top 25%)6242(Top 39%)6242(Top 111%)
10K6.21 mi3.10 mi7773+6476835+4266835+4267259(Top 26%)6481(Top 40%)6481(Top 115%)
15K9.32 mi3.11 mi7508+2656649+1866649+1866989(Top 25%)6242(Top 39%)6242(Top 111%)
20K12.43 mi3.11 mi7468+406608+416608+417493(Top 26%)6551(Top 41%)6551(Top 116%)
Half13.11 mi0.68 mi7406+626563+456563+456514(Top 23%)5854(Top 36%)5854(Top 104%)
25K15.53 mi2.42 mi7511-1056618-556618-558515(Top 30%)7063(Top 44%)7063(Top 125%)
30K18.64 mi3.11 mi7825-3146770-1526770-15210095(Top 36%)7739(Top 48%)7739(Top 137%)
20M20.00 mi1.36 mi8050-2256866-966866-9611732(Top 41%)8379(Top 52%)8379(Top 149%)
21M21.00 mi1.00 mi8256-2066969-1036969-10312357(Top 44%)8530(Top 53%)8530(Top 151%)
35K21.75 mi0.75 mi8413-1577032-637032-6313239(Top 47%)8895(Top 55%)8895(Top 158%)
23M23.00 mi1.25 mi8596-1837103-717103-7112049(Top 42%)8249(Top 51%)8249(Top 146%)
24M24.00 mi1.00 mi8828-2327203-1007203-10013100(Top 46%)8684(Top 54%)8684(Top 154%)
40K24.85 mi0.85 mi8979-1517257-547257-5413629(Top 48%)8810(Top 55%)8810(Top 156%)
25.2M25.20 mi0.35 mi8963+167229+287229+288781(Top 31%)6340(Top 39%)6340(Top 112%)
Finish26.22 mi1.02 mi9115-1527275-467275-4612824(Top 45%)8437(Top 52%)8437(Top 150%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

6989

Males

6242

M18-39

6242

5K→10K

3.1 - 6.2 mi

Top 26%
×5stories
+79ft-138ft

Overall

7259

Males

6481

M18-39

6481

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

6989

Males

6242

M18-39

6242

15K→20K

9.3 - 12.4 mi

Top 26%
×5stories
+106ft-86ft

Overall

7493

Males

6551

M18-39

6551

20K→Half

12.4 - 13.1 mi

Top 23%
×2stories
+19ft-37ft

Overall

6514

Males

5854

M18-39

5854

Half→25K

13.1 - 15.5 mi

Top 30%
×4stories
+66ft-88ft

Overall

8515

Males

7063

M18-39

7063

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

10095

Males

7739

M18-39

7739

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

11732

Males

8379

M18-39

8379

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

12357

Males

8530

M18-39

8530

21M→35K

21.0 - 21.8 mi

Top 47%
×7stories
+17ft-86ft

Overall

13239

Males

8895

M18-39

8895

35K→23M

21.8 - 23.0 mi

Top 42%
×5stories
+23ft-63ft

Overall

12049

Males

8249

M18-39

8249

23M→24M

23.0 - 24.0 mi

Top 46%
×6stories
+12ft-82ft

Overall

13100

Males

8684

M18-39

8684

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13629

Males

8810

M18-39

8810

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8781

Males

6340

M18-39

6340

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2stories
+22ft-21ft

Overall

12824

Males

8437

M18-39

8437

Passing Analysis

Category:
Athletes Passed
1726
Passed By
2421
Net Change
-695
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8420
5K → 10K68134+647#8420#7773
10K → 15K30237+265#7773#7508
15K → 20K148108+40#7508#7468
20K → Half675+62#7468#7406
Half → 25K74179-105#7406#7511
25K → 30K106420-314#7511#7825
30K → 20M43268-225#7825#8050
20M → 21M48254-206#8050#8256
21M → 35K25182-157#8256#8413
35K → 23M75258-183#8413#8596
23M → 24M36268-232#8596#8828
24M → 40K39190-151#8828#8979
40K → 25.2M4630+16#8979#8963
25.2M → Finish36188-152#8963#9115
TOTALS17262421-695
📊

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