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BOSTON MARATHON 2025

Tsukasa Kawarai

Bib: 380•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 10%
Gender (Male)
#0 / 16105
Top 17%
Division (M18-39)
#0 / 5642
Top 38%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
5:41/mi
17:38
↑ 97↓ 3451.5%
10K· 6.21 mi
5:42/mi
35:22
↑ 79↓ 1380.4%
15K· 9.32 mi
5:44/mi
53:11
↑ 67↓ 78
20K· 12.43 mi
5:51/mi
1:11:22
↑ 106↓ 860.1%
Half· 13.11 mi
5:44/mi
1:15:17
↑ 19↓ 370.5%
25K· 15.53 mi
5:53/mi
1:29:34
↑ 66↓ 880.2%
30K· 18.64 mi
6:13/mi
1:48:53
↑ 181↓ 1480.2%
20M
6:47/mi
1:58:06
↑ 64↓ 500.2%
21M
11:52/mi
2:09:58
↑ 106↓ 241.6%
35K· 21.75 mi
9:03/mi
2:16:44
↑ 17↓ 861.7%
23M
8:09/mi
2:26:56
↑ 23↓ 630.6%
24M
8:11/mi
2:35:07
↓ 821.3%
40K· 24.85 mi
8:33/mi
2:42:26
↓ 200.3%
25.2M
9:02/mi
2:45:33
↑ 13↓ 160.2%
Finish· 26.22 mi
7:36/mi
2:53:18
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:15:17
Pace5:45 /mi
2nd Half
Distance13.11 mi
Time1:38:01
Pace7:29 /mi
📊Positive Split: 30.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:4917:385:4117:38
5:41
-
10K
6.21 mi10:35:3335:225:4217:44
5:42
+0:01
15K
9.32 mi10:53:2253:115:4217:49
5:44
+0:02
20K
12.43 mi11:11:331:11:225:4518:11
5:51
+0:07
Half
13.11 mi11:15:281:15:175:453:55
5:44
-0:07
25K
15.53 mi11:29:451:29:345:4614:17
5:53
+0:09
30K
18.64 mi11:49:041:48:535:5019:19
6:13
+0:20
20M
20.00 mi11:58:171:58:065:549:13
6:47
+0:34
21M
21.00 mi12:10:092:09:586:1111:52
11:52
+5:05
35K
21.75 mi12:16:552:16:446:176:46
9:03
-2:49
23M
23.00 mi12:27:072:26:566:2310:12
8:09
-0:54
24M
24.00 mi12:35:182:35:076:288:11
8:11
+0:02
40K
24.85 mi12:42:372:42:266:327:19
8:33
+0:22
25.2M
25.20 mi12:45:442:45:336:343:07
9:02
+0:29
Finish
26.22 mi12:53:292:53:186:377:45
7:36
-1:26

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

5:41 /mi

Average Pace

6:37 /mi

Slowest Pace

11:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:34

52% of race

Time at Steady Pace

36:17

21% of race

Time at Slower Pace

47:27

27% of race

Average Pace: 6:37 /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 mi10:17:4917:385:4117:38
5:41
#394
10K
6.21 mi10:35:3335:225:4217:44
5:42
#429
15K
9.32 mi10:53:2253:115:4217:49
5:44
#412
20K
12.43 mi11:11:331:11:225:4518:11
5:51
#442
Half
13.11 mi11:15:281:15:175:453:55
5:44
#441
25K
15.53 mi11:29:451:29:345:4614:17
5:53
#449
30K
18.64 mi11:49:041:48:535:5019:19
6:13
#491
20M
20.00 mi11:58:171:58:065:549:13
6:47
#563
21M
21.00 mi12:10:092:09:586:1111:52
11:52
#1241
35K
21.75 mi12:16:552:16:446:176:46
9:03
#1601
23M
23.00 mi12:27:072:26:566:2310:12
8:09
#1970
24M
24.00 mi12:35:182:35:076:288:11
8:11
#2291
40K
24.85 mi12:42:372:42:266:327:19
8:33
#2576
25.2M
25.20 mi12:45:442:45:336:343:07
9:02
#2685
Finish
26.22 mi12:53:292:53:186:377:45
7:36
#2867
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi394361361433(Top 2%)402(Top 2%)402(Top 7%)
10K6.21 mi3.10 mi429-35393-32393-32470(Top 2%)434(Top 3%)434(Top 8%)
15K9.32 mi3.11 mi412+17381+12381+12433(Top 2%)402(Top 2%)402(Top 7%)
20K12.43 mi3.11 mi442-30408-27408-27526(Top 2%)486(Top 3%)486(Top 9%)
Half13.11 mi0.68 mi441+1407+1407+1489(Top 2%)459(Top 3%)459(Top 8%)
25K15.53 mi2.42 mi449-8414-7414-7559(Top 2%)517(Top 3%)517(Top 9%)
30K18.64 mi3.11 mi491-42454-40454-40975(Top 3%)917(Top 6%)917(Top 16%)
20M20.00 mi1.36 mi563-72518-64518-642817(Top 10%)2633(Top 16%)2633(Top 47%)
21M21.00 mi1.00 mi1241-6781170-6521170-65223336(Top 82%)13600(Top 84%)13600(Top 241%)
35K21.75 mi0.75 mi1601-3601517-3471517-34718408(Top 65%)11212(Top 70%)11212(Top 199%)
23M23.00 mi1.25 mi1970-3691870-3531870-35310984(Top 39%)7729(Top 48%)7729(Top 137%)
24M24.00 mi1.00 mi2291-3212181-3112181-31112412(Top 44%)8363(Top 52%)8363(Top 148%)
40K24.85 mi0.85 mi2576-2852444-2632444-26313730(Top 48%)8855(Top 55%)8855(Top 157%)
25.2M25.20 mi0.35 mi2685-1092543-992543-9911887(Top 42%)7898(Top 49%)7898(Top 140%)
Finish26.22 mi1.02 mi2867-1822711-1682711-1689905(Top 35%)6914(Top 43%)6914(Top 123%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21story building
+97ft-345ft

Overall

433

Males

402

M18-39

402

5K→10K

3.1 - 6.2 mi

Top 2%
×5story building
+79ft-138ft

Overall

470

Males

434

M18-39

434

10K→15K

6.2 - 9.3 mi

Top 2%
×3story building
+67ft-78ft

Overall

433

Males

402

M18-39

402

15K→20K

9.3 - 12.4 mi

Top 2%
×5story building
+106ft-86ft

Overall

526

Males

486

M18-39

486

20K→Half

12.4 - 13.1 mi

Top 2%
×2story building
+19ft-37ft

Overall

489

Males

459

M18-39

459

Half→25K

13.1 - 15.5 mi

Top 2%
×4story building
+66ft-88ft

Overall

559

Males

517

M18-39

517

25K→30K

15.5 - 18.6 mi

Top 3%
×9story building
+181ft-148ft

Overall

975

Males

917

M18-39

917

30K→20M

18.6 - 20.0 mi

Top 10%
×5story building
+64ft-50ft

Overall

2817

Males

2633

M18-39

2633

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23336

Males

13600

M18-39

13600

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

18408

Males

11212

M18-39

11212

35K→23M

21.8 - 23.0 mi

Top 39%
×5story building
+23ft-63ft

Overall

10984

Males

7729

M18-39

7729

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

12412

Males

8363

M18-39

8363

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13730

Males

8855

M18-39

8855

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11887

Males

7898

M18-39

7898

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2story building
+22ft-21ft

Overall

9905

Males

6914

M18-39

6914

Passing Analysis

Category:
Athletes Passed
101
Passed By
2574
Net Change
-2473
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#394
5K → 10K1146-35#394#429
10K → 15K3013+17#429#412
15K → 20K838-30#412#442
20K → Half76+1#442#441
Half → 25K1018-8#441#449
25K → 30K850-42#449#491
30K → 20M173-72#491#563
20M → 21M0678-678#563#1241
21M → 35K1361-360#1241#1601
35K → 23M6375-369#1601#1970
23M → 24M6327-321#1970#2291
24M → 40K6291-285#2291#2576
40K → 25.2M1110-109#2576#2685
25.2M → Finish6188-182#2685#2867
TOTALS1012574-2473
📊

Passing Visuals

Category:
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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