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BOSTON MARATHON 2025

James Nakamura

Bib: 4734•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 17%
Gender (Male)
#0 / 16105
Top 27%
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
20:00
Rank: #3364
Start → 5K
20:00 | 6:26/mi
10K· 6.21 mi
40:14
Rank: #3588 (-224)
5K → 10K
20:14 | 6:31/mi
15K· 9.32 mi
1:00:24
Rank: #3548 (+40)
10K → 15K
20:10 | 6:29/mi
20K· 12.43 mi
1:20:44
Rank: #3480 (+68)
15K → 20K
20:20 | 6:33/mi
Half· 13.11 mi
1:25:09
Rank: #3472 (+8)
20K → Half
4:25 | 6:28/mi
25K· 15.53 mi
1:41:05
Rank: #3427 (+45)
Half → 25K
15:56 | 6:34/mi
30K· 18.64 mi
2:02:25
Rank: #3435 (-8)
25K → 30K
21:20 | 6:52/mi
20M
2:11:51
Rank: #3425 (+10)
30K → 20M
9:26 | 6:57/mi
21M
2:19:20
Rank: #3473 (-48)
20M → 21M
7:29 | 7:29/mi
35K· 21.75 mi
2:24:38
Rank: #3512 (-39)
21M → 35K
5:18 | 7:05/mi
23M
2:34:23
Rank: #3755 (-243)
35K → 23M
9:45 | 7:47/mi
24M
2:42:32
Rank: #4096 (-341)
23M → 24M
8:09 | 8:09/mi
40K· 24.85 mi
2:49:39
Rank: #4426 (-330)
24M → 40K
7:07 | 8:19/mi
25.2M
2:52:36
Rank: #4524 (-98)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:00:24
Rank: #4771 (-247)
25.2M → Finish
7:48 | 7:39/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:09
Pace6:30 /mi
2nd Half
Distance13.11 mi
Time1:35:15
Pace7:16 /mi
📊Positive Split: 11.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:5020:006:2620:00
6:26
-
10K
6.21 mi10:46:0440:146:2820:14
6:31
+0:05
15K
9.32 mi11:06:141:00:246:2920:10
6:29
-0:02
20K
12.43 mi11:26:341:20:446:3020:20
6:33
+0:04
Half
13.11 mi11:30:591:25:096:304:25
6:28
-0:05
25K
15.53 mi11:46:551:41:056:3015:56
6:34
+0:06
30K
18.64 mi12:08:152:02:256:3421:20
6:52
+0:18
20M
20.00 mi12:17:412:11:516:369:26
6:57
+0:05
21M
21.00 mi12:25:102:19:206:387:29
7:29
+0:32
35K
21.75 mi12:30:282:24:386:395:18
7:05
-0:24
23M
23.00 mi12:40:132:34:236:439:45
7:47
+0:42
24M
24.00 mi12:48:222:42:326:468:09
8:09
+0:22
40K
24.85 mi12:55:292:49:396:507:07
8:19
+0:10
25.2M
25.20 mi12:58:262:52:366:512:57
8:33
+0:14
Finish
26.22 mi13:06:143:00:246:537:48
7:39
-0:54

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

6:26 /mi

Average Pace

6:53 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:05

56% of race

Time at Steady Pace

36:04

20% of race

Time at Slower Pace

43:15

24% of race

Average Pace: 6:53 /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 mi10:25:5020:006:2620:00
6:26
#3364
10K
6.21 mi10:46:0440:146:2820:14
6:31
#3588
15K
9.32 mi11:06:141:00:246:2920:10
6:29
#3548
20K
12.43 mi11:26:341:20:446:3020:20
6:33
#3480
Half
13.11 mi11:30:591:25:096:304:25
6:28
#3472
25K
15.53 mi11:46:551:41:056:3015:56
6:34
#3427
30K
18.64 mi12:08:152:02:256:3421:20
6:52
#3435
20M
20.00 mi12:17:412:11:516:369:26
6:57
#3425
21M
21.00 mi12:25:102:19:206:387:29
7:29
#3473
35K
21.75 mi12:30:282:24:386:395:18
7:05
#3512
23M
23.00 mi12:40:132:34:236:439:45
7:47
#3755
24M
24.00 mi12:48:222:42:326:468:09
8:09
#4096
40K
24.85 mi12:55:292:49:396:507:07
8:19
#4426
25.2M
25.20 mi12:58:262:52:366:512:57
8:33
#4524
Finish
26.22 mi13:06:143:00:246:537:48
7:39
#4771
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3364319531953505(Top 12%)3316(Top 21%)3316(Top 59%)
10K6.21 mi3.10 mi3588-2243403-2083403-2083815(Top 13%)3596(Top 22%)3596(Top 64%)
15K9.32 mi3.11 mi3548+403363+403363+403505(Top 12%)3316(Top 21%)3316(Top 59%)
20K12.43 mi3.11 mi3480+683299+643299+643381(Top 12%)3203(Top 20%)3203(Top 57%)
Half13.11 mi0.68 mi3472+83289+103289+103503(Top 12%)3319(Top 21%)3319(Top 59%)
25K15.53 mi2.42 mi3427+453255+343255+343277(Top 12%)3103(Top 19%)3103(Top 55%)
30K18.64 mi3.11 mi3435-83250+53250+53857(Top 14%)3561(Top 22%)3561(Top 63%)
20M20.00 mi1.36 mi3425+103239+113239+113760(Top 13%)3459(Top 21%)3459(Top 61%)
21M21.00 mi1.00 mi3473-483281-423281-424515(Top 16%)4005(Top 25%)4005(Top 71%)
35K21.75 mi0.75 mi3512-393313-323313-325856(Top 21%)4955(Top 31%)4955(Top 88%)
23M23.00 mi1.25 mi3755-2433516-2033516-2038459(Top 30%)6407(Top 40%)6407(Top 114%)
24M24.00 mi1.00 mi4096-3413801-2853801-28512197(Top 43%)8253(Top 51%)8253(Top 146%)
40K24.85 mi0.85 mi4426-3304076-2754076-27512242(Top 43%)8149(Top 51%)8149(Top 144%)
25.2M25.20 mi0.35 mi4524-984152-764152-768980(Top 32%)6399(Top 40%)6399(Top 113%)
Finish26.22 mi1.02 mi4771-2474363-2114363-21110284(Top 36%)7114(Top 44%)7114(Top 126%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3505

Males

3316

M18-39

3316

5K→10K

3.1 - 6.2 mi

Top 13%
×5stories
+79ft-138ft

Overall

3815

Males

3596

M18-39

3596

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3505

Males

3316

M18-39

3316

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3381

Males

3203

M18-39

3203

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3503

Males

3319

M18-39

3319

Half→25K

13.1 - 15.5 mi

Top 12%
×4stories
+66ft-88ft

Overall

3277

Males

3103

M18-39

3103

25K→30K

15.5 - 18.6 mi

Top 14%
×9stories
+181ft-148ft

Overall

3857

Males

3561

M18-39

3561

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3760

Males

3459

M18-39

3459

20M→21M

20.0 - 21.0 mi

Top 16%
×8stories
+106ft-24ft

Overall

4515

Males

4005

M18-39

4005

21M→35K

21.0 - 21.8 mi

Top 21%
×7stories
+17ft-86ft

Overall

5856

Males

4955

M18-39

4955

35K→23M

21.8 - 23.0 mi

Top 30%
×5stories
+23ft-63ft

Overall

8459

Males

6407

M18-39

6407

23M→24M

23.0 - 24.0 mi

Top 43%
×6stories
+12ft-82ft

Overall

12197

Males

8253

M18-39

8253

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12242

Males

8149

M18-39

8149

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

8980

Males

6399

M18-39

6399

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2stories
+22ft-21ft

Overall

10284

Males

7114

M18-39

7114

Passing Analysis

Category:
Athletes Passed
705
Passed By
2112
Net Change
-1407
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3364
5K → 10K44268-224#3364#3588
10K → 15K12080+40#3588#3548
15K → 20K13466+68#3548#3480
20K → Half2113+8#3480#3472
Half → 25K9449+45#3472#3427
25K → 30K107115-8#3427#3435
30K → 20M6757+10#3435#3425
20M → 21M3785-48#3425#3473
21M → 35K2968-39#3473#3512
35K → 23M21264-243#3512#3755
23M → 24M13354-341#3755#4096
24M → 40K5335-330#4096#4426
40K → 25.2M7105-98#4426#4524
25.2M → Finish6253-247#4524#4771
TOTALS7052112-1407
📊

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