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BOSTON MARATHON 2025

Tatsuya Arai

Bib: 4660•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 9%
Gender (Male)
#0 / 16105
Top 15%
Masters (Masters Men)
#0 / 10463
Top 4%
Division (M40-44)
#0 / 2247
Top 13%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:54
Rank: #5685
Start → 5K
6:44/mi
20:54 split
10K· 6.21 mi
41:31
Rank: #5202 (+483)
5K → 10K
6:38/mi
20:37 split
15K· 9.32 mi
1:02:12
Rank: #4986 (+216)
10K → 15K
6:39/mi
20:41 split
20K· 12.43 mi
1:22:48
Rank: #4661 (+325)
15K → 20K
6:38/mi
20:36 split
Half· 13.11 mi
1:27:12
Rank: #4569 (+92)
20K → Half
6:27/mi
4:24 split
25K· 15.53 mi
1:43:03
Rank: #4245 (+324)
Half → 25K
6:32/mi
15:51 split
30K· 18.64 mi
2:03:33
Rank: #3812 (+433)
25K → 30K
6:36/mi
20:30 split
20M
2:12:18
Rank: #3574 (+238)
30K → 20M
6:26/mi
8:45 split
21M
2:19:06
Rank: #3388 (+186)
20M → 21M
6:48/mi
6:48 split
35K· 21.75 mi
2:23:37
Rank: #3215 (+173)
21M → 35K
6:02/mi
4:31 split
23M
2:31:33
Rank: #2978 (+237)
35K → 23M
6:20/mi
7:56 split
24M
2:37:38
Rank: #2813 (+165)
23M → 24M
6:05/mi
6:05 split
40K· 24.85 mi
2:43:00
Rank: #2691 (+122)
24M → 40K
6:17/mi
5:22 split
25.2M
2:45:23
Rank: #2661 (+30)
40K → 25.2M
6:55/mi
2:23 split
Finish· 26.22 mi
2:51:43
Rank: #2581 (+80)
25.2M → Finish
6:13/mi
6:20 split

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:27:12
Pace6:39 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:24:31
Pace6:27 /mi
📊Negative Split: 3.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:3820:546:4420:54
6:44
-
10K
6.21 mi10:45:1541:316:4120:37
6:38
-0:06
15K
9.32 mi11:05:561:02:126:4020:41
6:39
+0:01
20K
12.43 mi11:26:321:22:486:4020:36
6:38
-0:01
Half
13.11 mi11:30:561:27:126:394:24
6:27
-0:11
25K
15.53 mi11:46:471:43:036:3815:51
6:32
+0:05
30K
18.64 mi12:07:172:03:336:3820:30
6:36
+0:04
20M
20.00 mi12:16:022:12:186:378:45
6:26
-0:10
21M
21.00 mi12:22:502:19:066:376:48
6:48
+0:22
35K
21.75 mi12:27:212:23:376:364:31
6:02
-0:46
23M
23.00 mi12:35:172:31:336:357:56
6:20
+0:18
24M
24.00 mi12:41:222:37:386:346:05
6:05
-0:15
40K
24.85 mi12:46:442:43:006:335:22
6:17
+0:12
25.2M
25.20 mi12:49:072:45:236:342:23
6:55
+0:38
Finish
26.22 mi12:55:272:51:436:336:20
6:13
-0:42

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

6:02 /mi

Average Pace

6:33 /mi

Slowest Pace

6:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:00:57

70% of race

Time at Steady Pace

50:46

30% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:33 /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 mi10:24:3820:546:4420:54
6:44
#5685
10K
6.21 mi10:45:1541:316:4120:37
6:38
#5202
15K
9.32 mi11:05:561:02:126:4020:41
6:39
#4986
20K
12.43 mi11:26:321:22:486:4020:36
6:38
#4661
Half
13.11 mi11:30:561:27:126:394:24
6:27
#4569
25K
15.53 mi11:46:471:43:036:3815:51
6:32
#4245
30K
18.64 mi12:07:172:03:336:3820:30
6:36
#3812
20M
20.00 mi12:16:022:12:186:378:45
6:26
#3574
21M
21.00 mi12:22:502:19:066:376:48
6:48
#3388
35K
21.75 mi12:27:212:23:376:364:31
6:02
#3215
23M
23.00 mi12:35:172:31:336:357:56
6:20
#2978
24M
24.00 mi12:41:222:37:386:346:05
6:05
#2813
40K
24.85 mi12:46:442:43:006:335:22
6:17
#2691
25.2M
25.20 mi12:49:072:45:236:342:23
6:55
#2661
Finish
26.22 mi12:55:272:51:436:336:20
6:13
#2581
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5685525252524715(Top 17%)4408(Top 27%)4408(Top 196%)
10K6.21 mi3.10 mi5202+4834838+4144838+4144748(Top 17%)4445(Top 28%)4445(Top 198%)
15K9.32 mi3.11 mi4986+2164650+1884650+1884715(Top 17%)4408(Top 27%)4408(Top 196%)
20K12.43 mi3.11 mi4661+3254353+2974353+2973897(Top 14%)3671(Top 23%)3671(Top 163%)
Half13.11 mi0.68 mi4569+924273+804273+803388(Top 12%)3214(Top 20%)3214(Top 143%)
25K15.53 mi2.42 mi4245+3243985+2883985+2883083(Top 11%)2924(Top 18%)2924(Top 130%)
30K18.64 mi3.11 mi3812+4333594+3913594+3912410(Top 8%)2282(Top 14%)2282(Top 102%)
20M20.00 mi1.36 mi3574+2383373+2213373+2211404(Top 5%)1329(Top 8%)1329(Top 59%)
21M21.00 mi1.00 mi3388+1863202+1713202+1711559(Top 5%)1470(Top 9%)1470(Top 65%)
35K21.75 mi0.75 mi3215+1733037+1653037+165826(Top 3%)772(Top 5%)772(Top 34%)
23M23.00 mi1.25 mi2978+2372816+2212816+221981(Top 3%)925(Top 6%)925(Top 41%)
24M24.00 mi1.00 mi2813+1652666+1502666+150748(Top 3%)703(Top 4%)703(Top 31%)
40K24.85 mi0.85 mi2691+1222549+1172549+117932(Top 3%)874(Top 5%)874(Top 39%)
25.2M25.20 mi0.35 mi2661+302520+292520+291279(Top 5%)1181(Top 7%)1181(Top 53%)
Finish26.22 mi1.02 mi2581+802445+752445+751582(Top 6%)1471(Top 9%)1471(Top 65%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21story building
+97ft-345ft

Overall

4715

Males

4408

M40-44

4408

5K→10K

3.1 - 6.2 mi

Top 17%
×5story building
+79ft-138ft

Overall

4748

Males

4445

M40-44

4445

10K→15K

6.2 - 9.3 mi

Top 17%
×3story building
+67ft-78ft

Overall

4715

Males

4408

M40-44

4408

15K→20K

9.3 - 12.4 mi

Top 14%
×5story building
+106ft-86ft

Overall

3897

Males

3671

M40-44

3671

20K→Half

12.4 - 13.1 mi

Top 12%
×2story building
+19ft-37ft

Overall

3388

Males

3214

M40-44

3214

Half→25K

13.1 - 15.5 mi

Top 11%
×4story building
+66ft-88ft

Overall

3083

Males

2924

M40-44

2924

25K→30K

15.5 - 18.6 mi

Top 8%
×9story building
+181ft-148ft

Overall

2410

Males

2282

M40-44

2282

30K→20M

18.6 - 20.0 mi

Top 5%
×5story building
+64ft-50ft

Overall

1404

Males

1329

M40-44

1329

20M→21M

20.0 - 21.0 mi

Top 5%
×8story building
+106ft-24ft

Overall

1559

Males

1470

M40-44

1470

21M→35K

21.0 - 21.8 mi

Top 3%
×7story building
+17ft-86ft

Overall

826

Males

772

M40-44

772

35K→23M

21.8 - 23.0 mi

Top 3%
×5story building
+23ft-63ft

Overall

981

Males

925

M40-44

925

23M→24M

23.0 - 24.0 mi

Top 3%
×6story building
+12ft-82ft

Overall

748

Males

703

M40-44

703

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

932

Males

874

M40-44

874

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1279

Males

1181

M40-44

1181

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2story building
+22ft-21ft

Overall

1582

Males

1471

M40-44

1471

Passing Analysis

Category:
Athletes Passed
3219
Passed By
115
Net Change
+3104
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5685
5K → 10K51734+483#5685#5202
10K → 15K26852+216#5202#4986
15K → 20K33712+325#4986#4661
20K → Half920+92#4661#4569
Half → 25K3273+324#4569#4245
25K → 30K4363+433#4245#3812
30K → 20M2391+238#3812#3574
20M → 21M1860+186#3574#3388
21M → 35K1730+173#3388#3215
35K → 23M2370+237#3215#2978
23M → 24M1650+165#2978#2813
24M → 40K1264+122#2813#2691
40K → 25.2M322+30#2691#2661
25.2M → Finish844+80#2661#2581
TOTALS3219115+3104
📊

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