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BOSTON MARATHON 2025

Hiroshi Iwai

Bib: 20845•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M65-69)
#0 / 639
Top 13%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:39
Rank: #16039
Start → 5K
24:39 | 7:56/mi
10K· 6.21 mi
49:15
Rank: #15907 (+132)
5K → 10K
24:36 | 7:55/mi
15K· 9.32 mi
1:13:47
Rank: #15635 (+272)
10K → 15K
24:32 | 7:54/mi
20K· 12.43 mi
1:38:58
Rank: #15665 (-30)
15K → 20K
25:11 | 8:06/mi
Half· 13.11 mi
1:44:30
Rank: #15711 (-46)
20K → Half
5:32 | 8:07/mi
25K· 15.53 mi
2:04:28
Rank: #15645 (+66)
Half → 25K
19:58 | 8:14/mi
30K· 18.64 mi
2:31:06
Rank: #15546 (+99)
25K → 30K
26:38 | 8:34/mi
20M
2:43:06
Rank: #15520 (+26)
30K → 20M
12:00 | 8:50/mi
21M
2:52:47
Rank: #15594 (-74)
20M → 21M
9:41 | 9:41/mi
35K· 21.75 mi
2:59:07
Rank: #15572 (+22)
21M → 35K
6:20 | 8:28/mi
23M
3:10:27
Rank: #15590 (-18)
35K → 23M
11:20 | 9:03/mi
24M
3:19:13
Rank: #15585 (+5)
23M → 24M
8:46 | 8:46/mi
40K· 24.85 mi
3:26:55
Rank: #15593 (-8)
24M → 40K
7:42 | 9:00/mi
25.2M
3:30:21
Rank: #15602 (-9)
40K → 25.2M
3:26 | 9:57/mi
Finish· 26.22 mi
3:39:18
Rank: #15698 (-96)
25.2M → Finish
8:57 | 8:47/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:30
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:54:48
Pace8:45 /mi
📊Positive Split: 9.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:3224:397:5624:39
7:56
-
10K
6.21 mi11:43:0849:157:5624:36
7:55
-0:01
15K
9.32 mi12:07:401:13:477:5524:32
7:54
-0:01
20K
12.43 mi12:32:511:38:587:5825:11
8:06
+0:12
Half
13.11 mi12:38:231:44:307:585:32
8:07
+0:01
25K
15.53 mi12:58:212:04:288:0119:58
8:14
+0:07
30K
18.64 mi13:24:592:31:068:0626:38
8:34
+0:20
20M
20.00 mi13:36:592:43:068:0912:00
8:50
+0:16
21M
21.00 mi13:46:402:52:478:149:41
9:41
+0:51
35K
21.75 mi13:53:002:59:078:146:20
8:28
-1:13
23M
23.00 mi14:04:203:10:278:1711:20
9:03
+0:35
24M
24.00 mi14:13:063:19:138:188:46
8:46
-0:17
40K
24.85 mi14:20:483:26:558:207:42
9:00
+0:14
25.2M
25.20 mi14:24:143:30:218:213:26
9:57
+0:57
Finish
26.22 mi14:33:113:39:188:228:57
8:47
-1:10

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

7:54 /mi

Average Pace

8:22 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:28

57% of race

Time at Steady Pace

1:02:41

29% of race

Time at Slower Pace

32:09

15% of race

Average Pace: 8:22 /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 mi11:18:3224:397:5624:39
7:56
#16039
10K
6.21 mi11:43:0849:157:5624:36
7:55
#15907
15K
9.32 mi12:07:401:13:477:5524:32
7:54
#15635
20K
12.43 mi12:32:511:38:587:5825:11
8:06
#15665
Half
13.11 mi12:38:231:44:307:585:32
8:07
#15711
25K
15.53 mi12:58:212:04:288:0119:58
8:14
#15645
30K
18.64 mi13:24:592:31:068:0626:38
8:34
#15546
20M
20.00 mi13:36:592:43:068:0912:00
8:50
#15520
21M
21.00 mi13:46:402:52:478:149:41
9:41
#15594
35K
21.75 mi13:53:002:59:078:146:20
8:28
#15572
23M
23.00 mi14:04:203:10:278:1711:20
9:03
#15590
24M
24.00 mi14:13:063:19:138:188:46
8:46
#15585
40K
24.85 mi14:20:483:26:558:207:42
9:00
#15593
25.2M
25.20 mi14:24:143:30:218:213:26
9:57
#15602
Finish
26.22 mi14:33:113:39:188:228:57
8:47
#15698
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi16039108261082615205(Top 54%)10468(Top 65%)10468(Top 1638%)
10K6.21 mi3.10 mi15907+13210782+4410782+4415789(Top 56%)10733(Top 67%)10733(Top 1680%)
15K9.32 mi3.11 mi15635+27210671+11110671+11115205(Top 54%)10468(Top 65%)10468(Top 1638%)
20K12.43 mi3.11 mi15665-3010654+1710654+1715671(Top 55%)10607(Top 66%)10607(Top 1660%)
Half13.11 mi0.68 mi15711-4610673-1910673-1916630(Top 59%)11025(Top 68%)11025(Top 1725%)
25K15.53 mi2.42 mi15645+6610629+4410629+4415515(Top 55%)10440(Top 65%)10440(Top 1634%)
30K18.64 mi3.11 mi15546+9910531+9810531+9815216(Top 54%)10152(Top 63%)10152(Top 1589%)
20M20.00 mi1.36 mi15520+2610493+3810493+3815821(Top 56%)10293(Top 64%)10293(Top 1611%)
21M21.00 mi1.00 mi15594-7410475+1810475+1816931(Top 60%)10660(Top 66%)10660(Top 1668%)
35K21.75 mi0.75 mi15572+2210454+2110454+2115228(Top 54%)9827(Top 61%)9827(Top 1538%)
23M23.00 mi1.25 mi15590-1810424+3010424+3016533(Top 58%)10301(Top 64%)10301(Top 1612%)
24M24.00 mi1.00 mi15585+510402+2210402+2216103(Top 57%)10076(Top 63%)10076(Top 1577%)
40K24.85 mi0.85 mi15593-810373+2910373+2916304(Top 57%)10053(Top 62%)10053(Top 1573%)
25.2M25.20 mi0.35 mi15602-910368+510368+516771(Top 59%)10254(Top 64%)10254(Top 1605%)
Finish26.22 mi1.02 mi15698-9610386-1810386-1817931(Top 63%)10842(Top 67%)10842(Top 1697%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21stories
+97ft-345ft

Overall

15205

Males

10468

M65-69

10468

5K→10K

3.1 - 6.2 mi

Top 56%
×5stories
+79ft-138ft

Overall

15789

Males

10733

M65-69

10733

10K→15K

6.2 - 9.3 mi

Top 54%
×3stories
+67ft-78ft

Overall

15205

Males

10468

M65-69

10468

15K→20K

9.3 - 12.4 mi

Top 55%
×5stories
+106ft-86ft

Overall

15671

Males

10607

M65-69

10607

20K→Half

12.4 - 13.1 mi

Top 59%
×2stories
+19ft-37ft

Overall

16630

Males

11025

M65-69

11025

Half→25K

13.1 - 15.5 mi

Top 55%
×4stories
+66ft-88ft

Overall

15515

Males

10440

M65-69

10440

25K→30K

15.5 - 18.6 mi

Top 54%
×9stories
+181ft-148ft

Overall

15216

Males

10152

M65-69

10152

30K→20M

18.6 - 20.0 mi

Top 56%
×5stories
+64ft-50ft

Overall

15821

Males

10293

M65-69

10293

20M→21M

20.0 - 21.0 mi

Top 60%
×8stories
+106ft-24ft

Overall

16931

Males

10660

M65-69

10660

21M→35K

21.0 - 21.8 mi

Top 54%
×7stories
+17ft-86ft

Overall

15228

Males

9827

M65-69

9827

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16533

Males

10301

M65-69

10301

23M→24M

23.0 - 24.0 mi

Top 57%
×6stories
+12ft-82ft

Overall

16103

Males

10076

M65-69

10076

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16304

Males

10053

M65-69

10053

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

16771

Males

10254

M65-69

10254

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2stories
+22ft-21ft

Overall

17931

Males

10842

M65-69

10842

Passing Analysis

Category:
Athletes Passed
2032
Passed By
1691
Net Change
+341
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16039
5K → 10K382250+132#16039#15907
10K → 15K35179+272#15907#15635
15K → 20K203233-30#15635#15665
20K → Half1258-46#15665#15711
Half → 25K213147+66#15711#15645
25K → 30K283184+99#15645#15546
30K → 20M127101+26#15546#15520
20M → 21M93167-74#15520#15594
21M → 35K6846+22#15594#15572
35K → 23M103121-18#15572#15590
23M → 24M6863+5#15590#15585
24M → 40K7179-8#15585#15593
40K → 25.2M2433-9#15593#15602
25.2M → Finish34130-96#15602#15698
TOTALS20321691+341
📊

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