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BOSTON MARATHON 2025

Takuya Aizawa

Bib: 13788•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 37%
Gender (Male)
#0 / 16105
Top 50%
Masters (Masters Men)
#0 / 10463
Top 39%
Division (M55-59)
#0 / 1648
Top 21%
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
7:23/mi
22:55
↑ 97↓ 3451.5%
10K· 6.21 mi
7:19/mi
45:40
↑ 79↓ 1380.4%
15K· 9.32 mi
7:18/mi
1:08:22
↑ 67↓ 78
20K· 12.43 mi
7:26/mi
1:31:27
↑ 106↓ 860.1%
Half· 13.11 mi
7:26/mi
1:36:31
↑ 19↓ 370.5%
25K· 15.53 mi
7:34/mi
1:54:51
↑ 66↓ 880.2%
30K· 18.64 mi
7:56/mi
2:19:29
↑ 181↓ 1480.2%
20M
7:59/mi
2:30:20
↑ 64↓ 500.2%
21M
8:34/mi
2:38:54
↑ 106↓ 241.6%
35K· 21.75 mi
7:52/mi
2:44:47
↑ 17↓ 861.7%
23M
8:10/mi
2:55:01
↑ 23↓ 630.6%
24M
8:01/mi
3:03:02
↓ 821.3%
40K· 24.85 mi
8:04/mi
3:09:56
↓ 200.3%
25.2M
9:02/mi
3:13:03
↑ 13↓ 160.2%
Finish· 26.22 mi
8:04/mi
3:21:16
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:31
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:44:45
Pace7:59 /mi
📊Positive Split: 8.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:5522:557:2322:55
7:23
-
10K
6.21 mi11:14:4045:407:2122:45
7:19
-0:04
15K
9.32 mi11:37:221:08:227:2022:42
7:18
-0:01
20K
12.43 mi12:00:271:31:277:2223:05
7:26
+0:08
Half
13.11 mi12:05:311:36:317:225:04
7:26
0:00
25K
15.53 mi12:23:511:54:517:2418:20
7:34
+0:08
30K
18.64 mi12:48:292:19:297:2924:38
7:56
+0:22
20M
20.00 mi12:59:202:30:207:3110:51
7:59
+0:03
21M
21.00 mi13:07:542:38:547:348:34
8:34
+0:35
35K
21.75 mi13:13:472:44:477:355:53
7:52
-0:42
23M
23.00 mi13:24:012:55:017:3710:14
8:10
+0:18
24M
24.00 mi13:32:023:03:027:388:01
8:01
-0:09
40K
24.85 mi13:38:563:09:567:396:54
8:04
+0:03
25.2M
25.20 mi13:42:033:13:037:403:07
9:02
+0:58
Finish
26.22 mi13:50:163:21:167:418:13
8:04
-0:58

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

7:18 /mi

Average Pace

7:41 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:54:51

57% of race

Time at Steady Pace

1:14:44

37% of race

Time at Slower Pace

11:41

6% of race

Average Pace: 7:41 /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 mi10:51:5522:557:2322:55
7:23
#11092
10K
6.21 mi11:14:4045:407:2122:45
7:19
#10760
15K
9.32 mi11:37:221:08:227:2022:42
7:18
#10527
20K
12.43 mi12:00:271:31:277:2223:05
7:26
#10380
Half
13.11 mi12:05:311:36:317:225:04
7:26
#10417
25K
15.53 mi12:23:511:54:517:2418:20
7:34
#10383
30K
18.64 mi12:48:292:19:297:2924:38
7:56
#10427
20M
20.00 mi12:59:202:30:207:3110:51
7:59
#10394
21M
21.00 mi13:07:542:38:547:348:34
8:34
#10396
35K
21.75 mi13:13:472:44:477:355:53
7:52
#10426
23M
23.00 mi13:24:012:55:017:3710:14
8:10
#10414
24M
24.00 mi13:32:023:03:027:388:01
8:01
#10446
40K
24.85 mi13:38:563:09:567:396:54
8:04
#10419
25.2M
25.20 mi13:42:033:13:037:403:07
9:02
#10435
Finish
26.22 mi13:50:163:21:167:418:13
8:04
#10508
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi110928734873410037(Top 35%)8105(Top 50%)8105(Top 492%)
10K6.21 mi3.10 mi10760+3328547+1878547+18710523(Top 37%)8423(Top 52%)8423(Top 511%)
15K9.32 mi3.11 mi10527+2338408+1398408+13910037(Top 35%)8105(Top 50%)8105(Top 492%)
20K12.43 mi3.11 mi10380+1478308+1008308+10010151(Top 36%)8095(Top 50%)8095(Top 491%)
Half13.11 mi0.68 mi10417-378317-98317-911047(Top 39%)8563(Top 53%)8563(Top 520%)
25K15.53 mi2.42 mi10383+348278+398278+3910435(Top 37%)8109(Top 50%)8109(Top 492%)
30K18.64 mi3.11 mi10427-448232+468232+4610845(Top 38%)8108(Top 50%)8108(Top 492%)
20M20.00 mi1.36 mi10394+338169+638169+6310333(Top 36%)7706(Top 48%)7706(Top 468%)
21M21.00 mi1.00 mi10396-28132+378132+3710870(Top 38%)7809(Top 48%)7809(Top 474%)
35K21.75 mi0.75 mi10426-308123+98123+911250(Top 40%)7977(Top 50%)7977(Top 484%)
23M23.00 mi1.25 mi10414+128074+498074+4911186(Top 39%)7838(Top 49%)7838(Top 476%)
24M24.00 mi1.00 mi10446-328061+138061+1311321(Top 40%)7812(Top 49%)7812(Top 474%)
40K24.85 mi0.85 mi10419+278015+468015+4610653(Top 38%)7381(Top 46%)7381(Top 448%)
25.2M25.20 mi0.35 mi10435-168005+108005+1011944(Top 42%)7955(Top 49%)7955(Top 483%)
Finish26.22 mi1.02 mi10508-738004+18004+113278(Top 47%)8644(Top 54%)8644(Top 525%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21story building
+97ft-345ft

Overall

10037

Males

8105

M55-59

8105

5K→10K

3.1 - 6.2 mi

Top 37%
×5story building
+79ft-138ft

Overall

10523

Males

8423

M55-59

8423

10K→15K

6.2 - 9.3 mi

Top 35%
×3story building
+67ft-78ft

Overall

10037

Males

8105

M55-59

8105

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

10151

Males

8095

M55-59

8095

20K→Half

12.4 - 13.1 mi

Top 39%
×2story building
+19ft-37ft

Overall

11047

Males

8563

M55-59

8563

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

10435

Males

8109

M55-59

8109

25K→30K

15.5 - 18.6 mi

Top 38%
×9story building
+181ft-148ft

Overall

10845

Males

8108

M55-59

8108

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

10333

Males

7706

M55-59

7706

20M→21M

20.0 - 21.0 mi

Top 38%
×8story building
+106ft-24ft

Overall

10870

Males

7809

M55-59

7809

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

11250

Males

7977

M55-59

7977

35K→23M

21.8 - 23.0 mi

Top 39%
×5story building
+23ft-63ft

Overall

11186

Males

7838

M55-59

7838

23M→24M

23.0 - 24.0 mi

Top 40%
×6story building
+12ft-82ft

Overall

11321

Males

7812

M55-59

7812

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10653

Males

7381

M55-59

7381

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11944

Males

7955

M55-59

7955

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2story building
+22ft-21ft

Overall

13278

Males

8644

M55-59

8644

Passing Analysis

Category:
Athletes Passed
2046
Passed By
1461
Net Change
+584
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11092
5K → 10K459127+332#11092#10760
10K → 15K29966+233#10760#10527
15K → 20K23790+147#10527#10380
20K → Half2764-37#10380#10417
Half → 25K168134+34#10417#10383
25K → 30K217260-44#10383#10427
30K → 20M137104+33#10427#10394
20M → 21M113115-2#10394#10396
21M → 35K4070-30#10396#10426
35K → 23M115103+12#10426#10414
23M → 24M69101-32#10414#10446
24M → 40K8457+27#10446#10419
40K → 25.2M2541-16#10419#10435
25.2M → Finish56129-73#10435#10508
TOTALS20461461+584
📊

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