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BOSTON MARATHON 2025

Takuya Karasawa

Bib: 591•M

UT

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 2%
Gender (Male)
#0 / 16105
Top 4%
Division (M18-39)
#0 / 5642
Top 10%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:54
Rank: #1349
Start → 5K
18:54 | 6:05/mi
10K· 6.21 mi
37:04
Rank: #989 (+360)
5K → 10K
18:10 | 5:51/mi
15K· 9.32 mi
55:43
Rank: #991 (-2)
10K → 15K
18:39 | 6:00/mi
20K· 12.43 mi
1:14:32
Rank: #986 (+5)
15K → 20K
18:49 | 6:03/mi
Half· 13.11 mi
1:18:39
Rank: #1000 (-14)
20K → Half
4:07 | 6:02/mi
25K· 15.53 mi
1:33:25
Rank: #995 (+5)
Half → 25K
14:46 | 6:05/mi
30K· 18.64 mi
1:52:40
Rank: #942 (+53)
25K → 30K
19:15 | 6:12/mi
20M
2:01:11
Rank: #917 (+25)
30K → 20M
8:31 | 6:16/mi
21M
2:07:36
Rank: #866 (+51)
20M → 21M
6:25 | 6:25/mi
35K· 21.75 mi
2:12:04
Rank: #844 (+22)
21M → 35K
4:28 | 5:58/mi
23M
2:19:46
Rank: #814 (+30)
35K → 23M
7:42 | 6:09/mi
24M
2:25:49
Rank: #792 (+22)
23M → 24M
6:03 | 6:03/mi
40K· 24.85 mi
2:31:00
Rank: #771 (+21)
24M → 40K
5:11 | 6:04/mi
25.2M
2:33:07
Rank: #740 (+31)
40K → 25.2M
2:07 | 6:08/mi
Finish· 26.22 mi
2:38:58
Rank: #709 (+31)
25.2M → Finish
5:51 | 5:44/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:18:39
Pace6:00 /mi
2nd Half
Distance13.11 mi
Time1:20:19
Pace6:08 /mi
📊Positive Split: 2.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:0818:546:0518:54
6:05
-
10K
6.21 mi10:37:1837:045:5818:10
5:51
-0:14
15K
9.32 mi10:55:5755:435:5918:39
6:00
+0:09
20K
12.43 mi11:14:461:14:326:0018:49
6:03
+0:03
Half
13.11 mi11:18:531:18:396:004:07
6:02
-0:01
25K
15.53 mi11:33:391:33:256:0114:46
6:05
+0:03
30K
18.64 mi11:52:541:52:406:0319:15
6:12
+0:07
20M
20.00 mi12:01:252:01:116:048:31
6:16
+0:04
21M
21.00 mi12:07:502:07:366:056:25
6:25
+0:09
35K
21.75 mi12:12:182:12:046:044:28
5:58
-0:27
23M
23.00 mi12:20:002:19:466:057:42
6:09
+0:11
24M
24.00 mi12:26:032:25:496:056:03
6:03
-0:06
40K
24.85 mi12:31:142:31:006:055:11
6:04
+0:01
25.2M
25.20 mi12:33:212:33:076:052:07
6:08
+0:04
Finish
26.22 mi12:39:122:38:586:045:51
5:44
-0:24

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

5:44 /mi

Average Pace

6:04 /mi

Slowest Pace

6:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:32:33

96% of race

Time at Steady Pace

6:25

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:04 /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 mi10:19:0818:546:0518:54
6:05
#1349
10K
6.21 mi10:37:1837:045:5818:10
5:51
#989
15K
9.32 mi10:55:5755:435:5918:39
6:00
#991
20K
12.43 mi11:14:461:14:326:0018:49
6:03
#986
Half
13.11 mi11:18:531:18:396:004:07
6:02
#1000
25K
15.53 mi11:33:391:33:256:0114:46
6:05
#995
30K
18.64 mi11:52:541:52:406:0319:15
6:12
#942
20M
20.00 mi12:01:252:01:116:048:31
6:16
#917
21M
21.00 mi12:07:502:07:366:056:25
6:25
#866
35K
21.75 mi12:12:182:12:046:044:28
5:58
#844
23M
23.00 mi12:20:002:19:466:057:42
6:09
#814
24M
24.00 mi12:26:032:25:496:056:03
6:03
#792
40K
24.85 mi12:31:142:31:006:055:11
6:04
#771
25.2M
25.20 mi12:33:212:33:076:052:07
6:08
#740
Finish
26.22 mi12:39:122:38:586:045:51
5:44
#709
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1349128412841037(Top 4%)981(Top 6%)981(Top 17%)
10K6.21 mi3.10 mi989+360931+353931+353699(Top 2%)654(Top 4%)654(Top 12%)
15K9.32 mi3.11 mi991-2934-3934-31037(Top 4%)981(Top 6%)981(Top 17%)
20K12.43 mi3.11 mi986+5929+5929+51015(Top 4%)956(Top 6%)956(Top 17%)
Half13.11 mi0.68 mi1000-14943-14943-141233(Top 4%)1167(Top 7%)1167(Top 21%)
25K15.53 mi2.42 mi995+5937+6937+61045(Top 4%)988(Top 6%)988(Top 18%)
30K18.64 mi3.11 mi942+53887+50887+50898(Top 3%)842(Top 5%)842(Top 15%)
20M20.00 mi1.36 mi917+25863+24863+24875(Top 3%)826(Top 5%)826(Top 15%)
21M21.00 mi1.00 mi866+51813+50813+50540(Top 2%)510(Top 3%)510(Top 9%)
35K21.75 mi0.75 mi844+22791+22791+22664(Top 2%)621(Top 4%)621(Top 11%)
23M23.00 mi1.25 mi814+30764+27764+27572(Top 2%)539(Top 3%)539(Top 10%)
24M24.00 mi1.00 mi792+22741+23741+23666(Top 2%)624(Top 4%)624(Top 11%)
40K24.85 mi0.85 mi771+21721+20721+20475(Top 2%)442(Top 3%)442(Top 8%)
25.2M25.20 mi0.35 mi740+31691+30691+30129(Top 0.5%)122(Top 0.8%)122(Top 2%)
Finish26.22 mi1.02 mi709+31660+31660+31420(Top 1%)394(Top 2%)394(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1037

Males

981

M18-39

981

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

699

Males

654

M18-39

654

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1037

Males

981

M18-39

981

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

1015

Males

956

M18-39

956

20K→Half

12.4 - 13.1 mi

Top 4%
×2stories
+19ft-37ft

Overall

1233

Males

1167

M18-39

1167

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1045

Males

988

M18-39

988

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

898

Males

842

M18-39

842

30K→20M

18.6 - 20.0 mi

Top 3%
×5stories
+64ft-50ft

Overall

875

Males

826

M18-39

826

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

540

Males

510

M18-39

510

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

664

Males

621

M18-39

621

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

572

Males

539

M18-39

539

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

666

Males

624

M18-39

624

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

475

Males

442

M18-39

442

40K→25.2M

24.9 - 25.2 mi

Top 0.5%
×1story
+13ft-16ft

Overall

129

Males

122

M18-39

122

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

420

Males

394

M18-39

394

Passing Analysis

Category:
Athletes Passed
789
Passed By
149
Net Change
+640
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1349
5K → 10K3622+360#1349#989
10K → 15K2729-2#989#991
15K → 20K3126+5#991#986
20K → Half216-14#986#1000
Half → 25K2722+5#1000#995
25K → 30K7219+53#995#942
30K → 20M4015+25#942#917
20M → 21M521+51#917#866
21M → 35K231+22#866#844
35K → 23M333+30#844#814
23M → 24M319+22#814#792
24M → 40K254+21#792#771
40K → 25.2M310+31#771#740
25.2M → Finish332+31#740#709
TOTALS789149+640
📊

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