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BOSTON MARATHON 2025

Kengo Hamasaki

Bib: 6322•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 40%
Masters (Masters Men)
#0 / 10463
Top 27%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:56
Rank: #5777
Start → 5K
20:56 | 6:44/mi
10K· 6.21 mi
41:45
Rank: #5551 (+226)
5K → 10K
20:49 | 6:42/mi
15K· 9.32 mi
1:02:32
Rank: #5331 (+220)
10K → 15K
20:47 | 6:41/mi
20K· 12.43 mi
1:23:34
Rank: #5213 (+118)
15K → 20K
21:02 | 6:46/mi
Half· 13.11 mi
1:28:25
Rank: #5422 (-209)
20K → Half
4:51 | 7:06/mi
25K· 15.53 mi
1:45:39
Rank: #5722 (-300)
Half → 25K
17:14 | 7:06/mi
30K· 18.64 mi
2:09:01
Rank: #6121 (-399)
25K → 30K
23:22 | 7:31/mi
20M
2:19:43
Rank: #6297 (-176)
30K → 20M
10:42 | 7:52/mi
21M
2:28:18
Rank: #6452 (-155)
20M → 21M
8:35 | 8:35/mi
35K· 21.75 mi
2:34:57
Rank: #6787 (-335)
21M → 35K
6:39 | 8:53/mi
23M
2:45:35
Rank: #7101 (-314)
35K → 23M
10:38 | 8:30/mi
24M
2:53:50
Rank: #7297 (-196)
23M → 24M
8:15 | 8:15/mi
40K· 24.85 mi
3:01:06
Rank: #7477 (-180)
24M → 40K
7:16 | 8:30/mi
25.2M
3:04:12
Rank: #7539 (-62)
40K → 25.2M
3:06 | 8:59/mi
Finish· 26.22 mi
3:12:00
Rank: #7608 (-69)
25.2M → Finish
7:48 | 7:39/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:25
Pace6:45 /mi
2nd Half
Distance13.11 mi
Time1:43:35
Pace7:54 /mi
📊Positive Split: 17.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:3020:566:4420:56
6:44
-
10K
6.21 mi10:46:1941:456:4320:49
6:42
-0:02
15K
9.32 mi11:07:061:02:326:4320:47
6:41
-0:01
20K
12.43 mi11:28:081:23:346:4321:02
6:46
+0:05
Half
13.11 mi11:32:591:28:256:454:51
7:06
+0:20
25K
15.53 mi11:50:131:45:396:4817:14
7:06
0:00
30K
18.64 mi12:13:352:09:016:5523:22
7:31
+0:25
20M
20.00 mi12:24:172:19:436:5910:42
7:52
+0:21
21M
21.00 mi12:32:522:28:187:048:35
8:35
+0:43
35K
21.75 mi12:39:312:34:577:076:39
8:53
+0:18
23M
23.00 mi12:50:092:45:357:1210:38
8:30
-0:23
24M
24.00 mi12:58:242:53:507:158:15
8:15
-0:15
40K
24.85 mi13:05:403:01:067:177:16
8:30
+0:15
25.2M
25.20 mi13:08:463:04:127:193:06
8:59
+0:29
Finish
26.22 mi13:16:343:12:007:207:48
7:39
-1:20

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

6:41 /mi

Average Pace

7:20 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:39

55% of race

Time at Steady Pace

41:52

22% of race

Time at Slower Pace

44:29

23% of race

Average Pace: 7:19 /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 mi10:25:3020:566:4420:56
6:44
#5777
10K
6.21 mi10:46:1941:456:4320:49
6:42
#5551
15K
9.32 mi11:07:061:02:326:4320:47
6:41
#5331
20K
12.43 mi11:28:081:23:346:4321:02
6:46
#5213
Half
13.11 mi11:32:591:28:256:454:51
7:06
#5422
25K
15.53 mi11:50:131:45:396:4817:14
7:06
#5722
30K
18.64 mi12:13:352:09:016:5523:22
7:31
#6121
20M
20.00 mi12:24:172:19:436:5910:42
7:52
#6297
21M
21.00 mi12:32:522:28:187:048:35
8:35
#6452
35K
21.75 mi12:39:312:34:577:076:39
8:53
#6787
23M
23.00 mi12:50:092:45:357:1210:38
8:30
#7101
24M
24.00 mi12:58:242:53:507:158:15
8:15
#7297
40K
24.85 mi13:05:403:01:067:177:16
8:30
#7477
25.2M
25.20 mi13:08:463:04:127:193:06
8:59
#7539
Finish
26.22 mi13:16:343:12:007:207:48
7:39
#7608
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5777532953294987(Top 18%)4639(Top 29%)4639(Top 206%)
10K6.21 mi3.10 mi5551+2265131+1985131+1985344(Top 19%)4945(Top 31%)4945(Top 220%)
15K9.32 mi3.11 mi5331+2204946+1854946+1854987(Top 18%)4639(Top 29%)4639(Top 206%)
20K12.43 mi3.11 mi5213+1184829+1174829+1175004(Top 18%)4620(Top 29%)4620(Top 206%)
Half13.11 mi0.68 mi5422-2095005-1765005-1768271(Top 29%)7042(Top 44%)7042(Top 313%)
25K15.53 mi2.42 mi5722-3005242-2375242-2377041(Top 25%)6143(Top 38%)6143(Top 273%)
30K18.64 mi3.11 mi6121-3995525-2835525-2837882(Top 28%)6509(Top 40%)6509(Top 290%)
20M20.00 mi1.36 mi6297-1765659-1345659-1349503(Top 33%)7255(Top 45%)7255(Top 323%)
21M21.00 mi1.00 mi6452-1555757-985757-9810952(Top 39%)7839(Top 49%)7839(Top 349%)
35K21.75 mi0.75 mi6787-3355989-2325989-23217658(Top 62%)10884(Top 68%)10884(Top 484%)
23M23.00 mi1.25 mi7101-3146163-1746163-17413232(Top 47%)8790(Top 55%)8790(Top 391%)
24M24.00 mi1.00 mi7297-1966258-956258-9512869(Top 45%)8573(Top 53%)8573(Top 382%)
40K24.85 mi0.85 mi7477-1806338-806338-8013374(Top 47%)8685(Top 54%)8685(Top 387%)
25.2M25.20 mi0.35 mi7539-626364-266364-2611631(Top 41%)7765(Top 48%)7765(Top 346%)
Finish26.22 mi1.02 mi7608-696377-136377-1310294(Top 36%)7124(Top 44%)7124(Top 317%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

4987

Males

4639

M40-44

4639

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5344

Males

4945

M40-44

4945

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

4987

Males

4639

M40-44

4639

15K→20K

9.3 - 12.4 mi

Top 18%
×5stories
+106ft-86ft

Overall

5004

Males

4620

M40-44

4620

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

8271

Males

7042

M40-44

7042

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

7041

Males

6143

M40-44

6143

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

7882

Males

6509

M40-44

6509

30K→20M

18.6 - 20.0 mi

Top 33%
×5stories
+64ft-50ft

Overall

9503

Males

7255

M40-44

7255

20M→21M

20.0 - 21.0 mi

Top 39%
×8stories
+106ft-24ft

Overall

10952

Males

7839

M40-44

7839

21M→35K

21.0 - 21.8 mi

Top 62%
×7stories
+17ft-86ft

Overall

17658

Males

10884

M40-44

10884

35K→23M

21.8 - 23.0 mi

Top 47%
×5stories
+23ft-63ft

Overall

13232

Males

8790

M40-44

8790

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

12869

Males

8573

M40-44

8573

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

13374

Males

8685

M40-44

8685

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

11631

Males

7765

M40-44

7765

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2stories
+22ft-21ft

Overall

10294

Males

7124

M40-44

7124

Passing Analysis

Category:
Athletes Passed
1130
Passed By
2961
Net Change
-1831
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5777
5K → 10K32498+226#5777#5551
10K → 15K25636+220#5551#5331
15K → 20K18163+118#5331#5213
20K → Half2211-209#5213#5422
Half → 25K53353-300#5422#5722
25K → 30K81480-399#5722#6121
30K → 20M44220-176#6121#6297
20M → 21M29184-155#6297#6452
21M → 35K6341-335#6452#6787
35K → 23M39353-314#6787#7101
23M → 24M30226-196#7101#7297
24M → 40K29209-180#7297#7477
40K → 25.2M1678-62#7477#7539
25.2M → Finish40109-69#7539#7608
TOTALS11302961-1831
📊

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