Boston Marathon logo
BOSTON MARATHON 2025

Masaru Furukawa

Bib: 8978•M

WI

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:09
Rank: #17301
Start → 5K
25:09 | 8:06/mi
10K· 6.21 mi
49:33
Rank: #16295 (+1006)
5K → 10K
24:24 | 7:51/mi
15K· 9.32 mi
1:13:43
Rank: #15570 (+725)
10K → 15K
24:10 | 7:47/mi
20K· 12.43 mi
1:38:05
Rank: #15029 (+541)
15K → 20K
24:22 | 7:51/mi
Half· 13.11 mi
1:43:20
Rank: #14939 (+90)
20K → Half
5:15 | 7:42/mi
25K· 15.53 mi
2:02:52
Rank: #14806 (+133)
Half → 25K
19:32 | 8:03/mi
30K· 18.64 mi
2:29:42
Rank: #14966 (-160)
25K → 30K
26:50 | 8:38/mi
20M
2:41:05
Rank: #14782 (+184)
30K → 20M
11:23 | 8:23/mi
21M
2:49:52
Rank: #14591 (+191)
20M → 21M
8:47 | 8:47/mi
35K· 21.75 mi
2:56:11
Rank: #14582 (+9)
21M → 35K
6:19 | 8:27/mi
23M
3:07:32
Rank: #14690 (-108)
35K → 23M
11:21 | 9:04/mi
24M
3:16:43
Rank: #14862 (-172)
23M → 24M
9:11 | 9:11/mi
40K· 24.85 mi
3:24:39
Rank: #14986 (-124)
24M → 40K
7:56 | 9:17/mi
25.2M
3:28:07
Rank: #15019 (-33)
40K → 25.2M
3:28 | 10:03/mi
Finish· 26.22 mi
3:37:21
Rank: #15225 (-206)
25.2M → Finish
9:14 | 9:04/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:20
Pace7:53 /mi
2nd Half
Distance13.11 mi
Time1:54:01
Pace8:42 /mi
📊Positive Split: 10.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:1025:098:0625:09
8:06
-
10K
6.21 mi11:40:3449:337:5824:24
7:51
-0:15
15K
9.32 mi12:04:441:13:437:5524:10
7:47
-0:04
20K
12.43 mi12:29:061:38:057:5424:22
7:51
+0:04
Half
13.11 mi12:34:211:43:207:535:15
7:42
-0:09
25K
15.53 mi12:53:532:02:527:5519:32
8:03
+0:21
30K
18.64 mi13:20:432:29:428:0226:50
8:38
+0:35
20M
20.00 mi13:32:062:41:058:0311:23
8:23
-0:15
21M
21.00 mi13:40:532:49:528:058:47
8:47
+0:24
35K
21.75 mi13:47:122:56:118:066:19
8:27
-0:20
23M
23.00 mi13:58:333:07:328:0911:21
9:04
+0:37
24M
24.00 mi14:07:443:16:438:129:11
9:11
+0:07
40K
24.85 mi14:15:403:24:398:147:56
9:17
+0:06
25.2M
25.20 mi14:19:083:28:078:163:28
10:03
+0:46
Finish
26.22 mi14:28:223:37:218:189:14
9:04
-0:59

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

7:42 /mi

Average Pace

8:18 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:02:52

57% of race

Time at Steady Pace

44:32

20% of race

Time at Slower Pace

49:57

23% of race

Average Pace: 8:17 /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 mi11:16:1025:098:0625:09
8:06
#17301
10K
6.21 mi11:40:3449:337:5824:24
7:51
#16295
15K
9.32 mi12:04:441:13:437:5524:10
7:47
#15570
20K
12.43 mi12:29:061:38:057:5424:22
7:51
#15029
Half
13.11 mi12:34:211:43:207:535:15
7:42
#14939
25K
15.53 mi12:53:532:02:527:5519:32
8:03
#14806
30K
18.64 mi13:20:432:29:428:0226:50
8:38
#14966
20M
20.00 mi13:32:062:41:058:0311:23
8:23
#14782
21M
21.00 mi13:40:532:49:528:058:47
8:47
#14591
35K
21.75 mi13:47:122:56:118:066:19
8:27
#14582
23M
23.00 mi13:58:333:07:328:0911:21
9:04
#14690
24M
24.00 mi14:07:443:16:438:129:11
9:11
#14862
40K
24.85 mi14:15:403:24:398:147:56
9:17
#14986
25.2M
25.20 mi14:19:083:28:078:163:28
10:03
#15019
Finish
26.22 mi14:28:223:37:218:189:14
9:04
#15225
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi17301113281132814175(Top 50%)10013(Top 62%)10013(Top 420%)
10K6.21 mi3.10 mi16295+100610927+40110927+40115277(Top 54%)10529(Top 65%)10529(Top 441%)
15K9.32 mi3.11 mi15570+72510642+28510642+28514175(Top 50%)10013(Top 62%)10013(Top 420%)
20K12.43 mi3.11 mi15029+54110385+25710385+25713616(Top 48%)9699(Top 60%)9699(Top 406%)
Half13.11 mi0.68 mi14939+9010338+4710338+4713330(Top 47%)9630(Top 60%)9630(Top 404%)
25K15.53 mi2.42 mi14806+13310253+8510253+8514315(Top 50%)9901(Top 61%)9901(Top 415%)
30K18.64 mi3.11 mi14966-16010271-1810271-1815593(Top 55%)10321(Top 64%)10321(Top 433%)
20M20.00 mi1.36 mi14782+18410172+9910172+9912991(Top 46%)8993(Top 56%)8993(Top 377%)
21M21.00 mi1.00 mi14591+19110054+11810054+11812190(Top 43%)8466(Top 53%)8466(Top 355%)
35K21.75 mi0.75 mi14582+910041+1310041+1315111(Top 53%)9776(Top 61%)9776(Top 410%)
23M23.00 mi1.25 mi14690-10810051-1010051-1016604(Top 58%)10328(Top 64%)10328(Top 433%)
24M24.00 mi1.00 mi14862-17210096-4510096-4518250(Top 64%)11032(Top 69%)11032(Top 462%)
40K24.85 mi0.85 mi14986-12410118-2210118-2217714(Top 62%)10685(Top 66%)10685(Top 448%)
25.2M25.20 mi0.35 mi15019-3310116+210116+217210(Top 61%)10451(Top 65%)10451(Top 438%)
Finish26.22 mi1.02 mi15225-20610178-6210178-6219305(Top 68%)11482(Top 71%)11482(Top 481%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

14175

Males

10013

M45-49

10013

5K→10K

3.1 - 6.2 mi

Top 54%
×5stories
+79ft-138ft

Overall

15277

Males

10529

M45-49

10529

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

14175

Males

10013

M45-49

10013

15K→20K

9.3 - 12.4 mi

Top 48%
×5stories
+106ft-86ft

Overall

13616

Males

9699

M45-49

9699

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

13330

Males

9630

M45-49

9630

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

14315

Males

9901

M45-49

9901

25K→30K

15.5 - 18.6 mi

Top 55%
×9stories
+181ft-148ft

Overall

15593

Males

10321

M45-49

10321

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

12991

Males

8993

M45-49

8993

20M→21M

20.0 - 21.0 mi

Top 43%
×8stories
+106ft-24ft

Overall

12190

Males

8466

M45-49

8466

21M→35K

21.0 - 21.8 mi

Top 53%
×7stories
+17ft-86ft

Overall

15111

Males

9776

M45-49

9776

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16604

Males

10328

M45-49

10328

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

18250

Males

11032

M45-49

11032

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

17714

Males

10685

M45-49

10685

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

17210

Males

10451

M45-49

10451

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2stories
+22ft-21ft

Overall

19305

Males

11482

M45-49

11482

Passing Analysis

Category:
Athletes Passed
3591
Passed By
1515
Net Change
+2076
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17301
5K → 10K105448+1006#17301#16295
10K → 15K74419+725#16295#15570
15K → 20K56120+541#15570#15029
20K → Half966+90#15029#14939
Half → 25K234101+133#14939#14806
25K → 30K206366-160#14806#14966
30K → 20M21632+184#14966#14782
20M → 21M21524+191#14782#14591
21M → 35K8172+9#14591#14582
35K → 23M61169-108#14582#14690
23M → 24M36208-172#14690#14862
24M → 40K38162-124#14862#14986
40K → 25.2M2861-33#14986#15019
25.2M → Finish21227-206#15019#15225
TOTALS35911515+2076
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing