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BOSTON MARATHON 2025

John Chambers

Bib: 1765•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 2%
Gender (Male)
#0 / 16105
Top 3%
Division (M18-39)
#0 / 5642
Top 7%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:49
Rank: #483
Start → 5K
17:49 | 5:44/mi
10K· 6.21 mi
35:33
Rank: #468 (+15)
5K → 10K
17:44 | 5:42/mi
15K· 9.32 mi
53:10
Rank: #409 (+59)
10K → 15K
17:37 | 5:40/mi
20K· 12.43 mi
1:10:40
Rank: #359 (+50)
15K → 20K
17:30 | 5:38/mi
Half· 13.11 mi
1:14:28
Rank: #352 (+7)
20K → Half
3:48 | 5:34/mi
25K· 15.53 mi
1:28:11
Rank: #329 (+23)
Half → 25K
13:43 | 5:39/mi
30K· 18.64 mi
1:46:16
Rank: #308 (+21)
25K → 30K
18:05 | 5:49/mi
20M
1:54:26
Rank: #307 (+1)
30K → 20M
8:10 | 6:01/mi
21M
2:01:00
Rank: #316 (-9)
20M → 21M
6:34 | 6:34/mi
35K· 21.75 mi
2:05:35
Rank: #324 (-8)
21M → 35K
4:35 | 6:08/mi
23M
2:13:48
Rank: #358 (-34)
35K → 23M
8:13 | 6:34/mi
24M
2:20:26
Rank: #383 (-25)
23M → 24M
6:38 | 6:38/mi
40K· 24.85 mi
2:26:15
Rank: #409 (-26)
24M → 40K
5:49 | 6:48/mi
25.2M
2:28:52
Rank: #427 (-18)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
2:35:49
Rank: #487 (-60)
25.2M → Finish
6:57 | 6:49/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:14:28
Pace5:41 /mi
2nd Half
Distance13.11 mi
Time1:21:21
Pace6:12 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:1017:495:4417:49
5:44
-
10K
6.21 mi10:35:5435:335:4317:44
5:42
-0:02
15K
9.32 mi10:53:3153:105:4217:37
5:40
-0:02
20K
12.43 mi11:11:011:10:405:4117:30
5:38
-0:02
Half
13.11 mi11:14:491:14:285:413:48
5:34
-0:04
25K
15.53 mi11:28:321:28:115:4113:43
5:39
+0:05
30K
18.64 mi11:46:371:46:165:4218:05
5:49
+0:10
20M
20.00 mi11:54:471:54:265:438:10
6:01
+0:12
21M
21.00 mi12:01:212:01:005:466:34
6:34
+0:33
35K
21.75 mi12:05:562:05:355:464:35
6:08
-0:26
23M
23.00 mi12:14:092:13:485:498:13
6:34
+0:26
24M
24.00 mi12:20:472:20:265:516:38
6:38
+0:04
40K
24.85 mi12:26:362:26:155:535:49
6:48
+0:10
25.2M
25.20 mi12:29:132:28:525:542:37
7:35
+0:47
Finish
26.22 mi12:36:102:35:495:576:57
6:49
-0:46

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

5:34 /mi

Average Pace

5:57 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:10:22

45% of race

Time at Steady Pace

48:39

31% of race

Time at Slower Pace

36:48

24% of race

Average Pace: 5:57 /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 mi10:18:1017:495:4417:49
5:44
#483
10K
6.21 mi10:35:5435:335:4317:44
5:42
#468
15K
9.32 mi10:53:3153:105:4217:37
5:40
#409
20K
12.43 mi11:11:011:10:405:4117:30
5:38
#359
Half
13.11 mi11:14:491:14:285:413:48
5:34
#352
25K
15.53 mi11:28:321:28:115:4113:43
5:39
#329
30K
18.64 mi11:46:371:46:165:4218:05
5:49
#308
20M
20.00 mi11:54:471:54:265:438:10
6:01
#307
21M
21.00 mi12:01:212:01:005:466:34
6:34
#316
35K
21.75 mi12:05:562:05:355:464:35
6:08
#324
23M
23.00 mi12:14:092:13:485:498:13
6:34
#358
24M
24.00 mi12:20:472:20:265:516:38
6:38
#383
40K
24.85 mi12:26:362:26:155:535:49
6:48
#409
25.2M
25.20 mi12:29:132:28:525:542:37
7:35
#427
Finish
26.22 mi12:36:102:35:495:576:57
6:49
#487
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi483445445338(Top 1%)310(Top 2%)310(Top 5%)
10K6.21 mi3.10 mi468+15431+14431+14467(Top 2%)431(Top 3%)431(Top 8%)
15K9.32 mi3.11 mi409+59378+53378+53338(Top 1%)310(Top 2%)310(Top 5%)
20K12.43 mi3.11 mi359+50330+48330+48238(Top 0.8%)214(Top 1%)214(Top 4%)
Half13.11 mi0.68 mi352+7323+7323+7274(Top 1.0%)249(Top 2%)249(Top 4%)
25K15.53 mi2.42 mi329+23301+22301+22250(Top 0.9%)225(Top 1%)225(Top 4%)
30K18.64 mi3.11 mi308+21280+21280+21268(Top 0.9%)246(Top 2%)246(Top 4%)
20M20.00 mi1.36 mi307+1280280402(Top 1%)376(Top 2%)376(Top 7%)
21M21.00 mi1.00 mi316-9289-9289-9810(Top 3%)765(Top 5%)765(Top 14%)
35K21.75 mi0.75 mi324-8297-8297-8994(Top 3%)935(Top 6%)935(Top 17%)
23M23.00 mi1.25 mi358-34331-34331-341659(Top 6%)1548(Top 10%)1548(Top 27%)
24M24.00 mi1.00 mi383-25354-23354-232607(Top 9%)2390(Top 15%)2390(Top 42%)
40K24.85 mi0.85 mi409-26377-23377-232811(Top 10%)2537(Top 16%)2537(Top 45%)
25.2M25.20 mi0.35 mi427-18394-17394-173708(Top 13%)3190(Top 20%)3190(Top 57%)
Finish26.22 mi1.02 mi487-60449-55449-554581(Top 16%)3831(Top 24%)3831(Top 68%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

338

Males

310

M18-39

310

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

467

Males

431

M18-39

431

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

338

Males

310

M18-39

310

15K→20K

9.3 - 12.4 mi

Top 0.8%
×5stories
+106ft-86ft

Overall

238

Males

214

M18-39

214

20K→Half

12.4 - 13.1 mi

Top 1.0%
×2stories
+19ft-37ft

Overall

274

Males

249

M18-39

249

Half→25K

13.1 - 15.5 mi

Top 0.9%
×4stories
+66ft-88ft

Overall

250

Males

225

M18-39

225

25K→30K

15.5 - 18.6 mi

Top 0.9%
×9stories
+181ft-148ft

Overall

268

Males

246

M18-39

246

30K→20M

18.6 - 20.0 mi

Top 1%
×5stories
+64ft-50ft

Overall

402

Males

376

M18-39

376

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

810

Males

765

M18-39

765

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

994

Males

935

M18-39

935

35K→23M

21.8 - 23.0 mi

Top 6%
×5stories
+23ft-63ft

Overall

1659

Males

1548

M18-39

1548

23M→24M

23.0 - 24.0 mi

Top 9%
×6stories
+12ft-82ft

Overall

2607

Males

2390

M18-39

2390

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2811

Males

2537

M18-39

2537

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3708

Males

3190

M18-39

3190

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4581

Males

3831

M18-39

3831

Passing Analysis

Category:
Athletes Passed
230
Passed By
234
Net Change
-4
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#483
5K → 10K3419+15#483#468
10K → 15K623+59#468#409
15K → 20K511+50#409#359
20K → Half70+7#359#352
Half → 25K252+23#352#329
25K → 30K287+21#329#308
30K → 20M76+1#308#307
20M → 21M312-9#307#316
21M → 35K08-8#316#324
35K → 23M640-34#324#358
23M → 24M227-25#358#383
24M → 40K329-26#383#409
40K → 25.2M119-18#409#427
25.2M → Finish161-60#427#487
TOTALS230234-4
📊

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