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BOSTON MARATHON 2025

Ko Ihara

Bib: 7930•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 36%
Gender (Male)
#0 / 16105
Top 49%
Masters (Masters Men)
#0 / 10463
Top 39%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:51
Rank: #10886
Start → 5K
22:51 | 7:21/mi
10K· 6.21 mi
45:53
Rank: #11091 (-205)
5K → 10K
23:02 | 7:25/mi
15K· 9.32 mi
1:09:28
Rank: #11552 (-461)
10K → 15K
23:35 | 7:35/mi
20K· 12.43 mi
1:32:25
Rank: #11079 (+473)
15K → 20K
22:57 | 7:23/mi
Half· 13.11 mi
1:37:24
Rank: #11023 (+56)
20K → Half
4:59 | 7:18/mi
25K· 15.53 mi
1:55:19
Rank: #10640 (+383)
Half → 25K
17:55 | 7:23/mi
30K· 18.64 mi
2:18:35
Rank: #10002 (+638)
25K → 30K
23:16 | 7:29/mi
20M
2:28:30
Rank: #9590 (+412)
30K → 20M
9:55 | 7:18/mi
21M
2:36:21
Rank: #9364 (+226)
20M → 21M
7:51 | 7:51/mi
35K· 21.75 mi
2:43:22
Rank: #9838 (-474)
21M → 35K
7:01 | 9:23/mi
23M
2:53:53
Rank: #10013 (-175)
35K → 23M
10:31 | 8:24/mi
24M
3:01:57
Rank: #10076 (-63)
23M → 24M
8:04 | 8:04/mi
40K· 24.85 mi
3:09:05
Rank: #10143 (-67)
24M → 40K
7:08 | 8:21/mi
25.2M
3:12:17
Rank: #10171 (-28)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:20:42
Rank: #10347 (-176)
25.2M → Finish
8:25 | 8:16/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:24
Pace7:26 /mi
2nd Half
Distance13.11 mi
Time1:43:18
Pace7:53 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:31:4722:517:2122:51
7:21
-
10K
6.21 mi10:54:4945:537:2323:02
7:25
+0:04
15K
9.32 mi11:18:241:09:287:2723:35
7:35
+0:10
20K
12.43 mi11:41:211:32:257:2622:57
7:23
-0:12
Half
13.11 mi11:46:201:37:247:264:59
7:18
-0:05
25K
15.53 mi12:04:151:55:197:2517:55
7:23
+0:05
30K
18.64 mi12:27:312:18:357:2623:16
7:29
+0:06
20M
20.00 mi12:37:262:28:307:259:55
7:18
-0:11
21M
21.00 mi12:45:172:36:217:277:51
7:51
+0:33
35K
21.75 mi12:52:182:43:227:317:01
9:23
+1:32
23M
23.00 mi13:02:492:53:537:3410:31
8:24
-0:59
24M
24.00 mi13:10:533:01:577:358:04
8:04
-0:20
40K
24.85 mi13:18:013:09:057:367:08
8:21
+0:17
25.2M
25.20 mi13:21:133:12:177:383:12
9:17
+0:56
Finish
26.22 mi13:29:383:20:427:408:25
8:16
-1:01

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

7:40 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:36:21

78% of race

Time at Slower Pace

44:21

22% of race

Average Pace: 7:39 /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 mi10:31:4722:517:2122:51
7:21
#10886
10K
6.21 mi10:54:4945:537:2323:02
7:25
#11091
15K
9.32 mi11:18:241:09:287:2723:35
7:35
#11552
20K
12.43 mi11:41:211:32:257:2622:57
7:23
#11079
Half
13.11 mi11:46:201:37:247:264:59
7:18
#11023
25K
15.53 mi12:04:151:55:197:2517:55
7:23
#10640
30K
18.64 mi12:27:312:18:357:2623:16
7:29
#10002
20M
20.00 mi12:37:262:28:307:259:55
7:18
#9590
21M
21.00 mi12:45:172:36:217:277:51
7:51
#9364
35K
21.75 mi12:52:182:43:227:317:01
9:23
#9838
23M
23.00 mi13:02:492:53:537:3410:31
8:24
#10013
24M
24.00 mi13:10:533:01:577:358:04
8:04
#10076
40K
24.85 mi13:18:013:09:057:367:08
8:21
#10143
25.2M
25.20 mi13:21:133:12:177:383:12
9:17
#10171
Finish
26.22 mi13:29:383:20:427:408:25
8:16
#10347
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi108868638863812498(Top 44%)9290(Top 58%)9290(Top 413%)
10K6.21 mi3.10 mi11091-2058721-838721-8311295(Top 40%)8797(Top 55%)8797(Top 391%)
15K9.32 mi3.11 mi11552-4618917-1968917-19612498(Top 44%)9290(Top 58%)9290(Top 413%)
20K12.43 mi3.11 mi11079+4738665+2528665+2529786(Top 34%)7896(Top 49%)7896(Top 351%)
Half13.11 mi0.68 mi11023+568642+238642+2310000(Top 35%)8022(Top 50%)8022(Top 357%)
25K15.53 mi2.42 mi10640+3838411+2318411+2319068(Top 32%)7384(Top 46%)7384(Top 329%)
30K18.64 mi3.11 mi10002+6388022+3898022+3897678(Top 27%)6397(Top 40%)6397(Top 285%)
20M20.00 mi1.36 mi9590+4127754+2687754+2685794(Top 20%)5055(Top 31%)5055(Top 225%)
21M21.00 mi1.00 mi9364+2267601+1537601+1536497(Top 23%)5392(Top 33%)5392(Top 240%)
35K21.75 mi0.75 mi9838-4747835-2347835-23419848(Top 70%)11889(Top 74%)11889(Top 529%)
23M23.00 mi1.25 mi10013-1757874-397874-3912646(Top 45%)8532(Top 53%)8532(Top 380%)
24M24.00 mi1.00 mi10076-637870+47870+411670(Top 41%)7985(Top 50%)7985(Top 355%)
40K24.85 mi0.85 mi10143-677865+57865+512383(Top 44%)8223(Top 51%)8223(Top 366%)
25.2M25.20 mi0.35 mi10171-287867-27867-213275(Top 47%)8581(Top 53%)8581(Top 382%)
Finish26.22 mi1.02 mi10347-1767928-617928-6114637(Top 52%)9309(Top 58%)9309(Top 414%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21stories
+97ft-345ft

Overall

12498

Males

9290

M40-44

9290

5K→10K

3.1 - 6.2 mi

Top 40%
×5stories
+79ft-138ft

Overall

11295

Males

8797

M40-44

8797

10K→15K

6.2 - 9.3 mi

Top 44%
×3stories
+67ft-78ft

Overall

12498

Males

9290

M40-44

9290

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9786

Males

7896

M40-44

7896

20K→Half

12.4 - 13.1 mi

Top 35%
×2stories
+19ft-37ft

Overall

10000

Males

8022

M40-44

8022

Half→25K

13.1 - 15.5 mi

Top 32%
×4stories
+66ft-88ft

Overall

9068

Males

7384

M40-44

7384

25K→30K

15.5 - 18.6 mi

Top 27%
×9stories
+181ft-148ft

Overall

7678

Males

6397

M40-44

6397

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5794

Males

5055

M40-44

5055

20M→21M

20.0 - 21.0 mi

Top 23%
×8stories
+106ft-24ft

Overall

6497

Males

5392

M40-44

5392

21M→35K

21.0 - 21.8 mi

Top 70%
×7stories
+17ft-86ft

Overall

19848

Males

11889

M40-44

11889

35K→23M

21.8 - 23.0 mi

Top 45%
×5stories
+23ft-63ft

Overall

12646

Males

8532

M40-44

8532

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

11670

Males

7985

M40-44

7985

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12383

Males

8223

M40-44

8223

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13275

Males

8581

M40-44

8581

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2stories
+22ft-21ft

Overall

14637

Males

9309

M40-44

9309

Passing Analysis

Category:
Athletes Passed
2757*
Passed By
2215
Net Change
+539
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10886
5K → 10K181386-205#10886#11091
10K → 15K76537-461#11091#11552
15K → 20K48916+473#11552#11079
20K → Half7216+56#11079#11023
Half → 25K39613+383#11023#10640
25K → 30K645*7+638#10640#10002
30K → 20M412*0+412#10002#9590
20M → 21M2348+226#9590#9364
21M → 35K12486-474#9364#9838
35K → 23M53226-175#9838#10013
23M → 24M65127-63#10013#10076
24M → 40K66133-67#10076#10143
40K → 25.2M2048-28#10143#10171
25.2M → Finish36212-176#10171#10347
TOTALS2757*2215+539

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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