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BOSTON MARATHON 2025

Naoya Katsuragawa

Bib: 4627•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 11%
Gender (Male)
#0 / 16105
Top 18%
Masters (Masters Men)
#0 / 10463
Top 6%
Division (M50-54)
#0 / 1996
Top 3%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:07
Rank: #6271
Start → 5K
6:48/mi
21:07 split
10K· 6.21 mi
41:54
Rank: #5761 (+510)
5K → 10K
6:41/mi
20:47 split
15K· 9.32 mi
1:02:48
Rank: #5594 (+167)
10K → 15K
6:44/mi
20:54 split
20K· 12.43 mi
1:23:36
Rank: #5239 (+355)
15K → 20K
6:42/mi
20:48 split
Half· 13.11 mi
1:28:04
Rank: #5138 (+101)
20K → Half
6:33/mi
4:28 split
25K· 15.53 mi
1:43:57
Rank: #4717 (+421)
Half → 25K
6:33/mi
15:53 split
30K· 18.64 mi
2:05:08
Rank: #4418 (+299)
25K → 30K
6:49/mi
21:11 split
20M
2:14:13
Rank: #4183 (+235)
30K → 20M
6:41/mi
9:05 split
21M
2:21:01
Rank: #3950 (+233)
20M → 21M
6:48/mi
6:48 split
35K· 21.75 mi
2:25:51
Rank: #3859 (+91)
21M → 35K
6:28/mi
4:50 split
23M
2:34:06
Rank: #3678 (+181)
35K → 23M
6:35/mi
8:15 split
24M
2:40:27
Rank: #3501 (+177)
23M → 24M
6:21/mi
6:21 split
40K· 24.85 mi
2:45:53
Rank: #3343 (+158)
24M → 40K
6:21/mi
5:26 split
25.2M
2:48:09
Rank: #3244 (+99)
40K → 25.2M
6:34/mi
2:16 split
Finish· 26.22 mi
2:54:17
Rank: #3062 (+182)
25.2M → Finish
6:01/mi
6:08 split

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:28:04
Pace6:43 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:26:13
Pace6:35 /mi
📊Negative Split: 2.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:3021:076:4821:07
6:48
-
10K
6.21 mi10:45:1741:546:4520:47
6:41
-0:07
15K
9.32 mi11:06:111:02:486:4420:54
6:44
+0:03
20K
12.43 mi11:26:591:23:366:4420:48
6:42
-0:02
Half
13.11 mi11:31:271:28:046:434:28
6:33
-0:09
25K
15.53 mi11:47:201:43:576:4115:53
6:33
0:00
30K
18.64 mi12:08:312:05:086:4321:11
6:49
+0:16
20M
20.00 mi12:17:362:14:136:439:05
6:41
-0:08
21M
21.00 mi12:24:242:21:016:436:48
6:48
+0:07
35K
21.75 mi12:29:142:25:516:424:50
6:28
-0:20
23M
23.00 mi12:37:292:34:066:428:15
6:35
+0:07
24M
24.00 mi12:43:502:40:276:416:21
6:21
-0:14
40K
24.85 mi12:49:162:45:536:405:26
6:21
0:00
25.2M
25.20 mi12:51:322:48:096:402:16
6:34
+0:13
Finish
26.22 mi12:57:402:54:176:396:08
6:01
-0:33

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

6:01 /mi

Average Pace

6:39 /mi

Slowest Pace

6:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

53:37

31% of race

Time at Steady Pace

2:00:40

69% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:39 /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 mi10:24:3021:076:4821:07
6:48
#6271
10K
6.21 mi10:45:1741:546:4520:47
6:41
#5761
15K
9.32 mi11:06:111:02:486:4420:54
6:44
#5594
20K
12.43 mi11:26:591:23:366:4420:48
6:42
#5239
Half
13.11 mi11:31:271:28:046:434:28
6:33
#5138
25K
15.53 mi11:47:201:43:576:4115:53
6:33
#4717
30K
18.64 mi12:08:312:05:086:4321:11
6:49
#4418
20M
20.00 mi12:17:362:14:136:439:05
6:41
#4183
21M
21.00 mi12:24:242:21:016:436:48
6:48
#3950
35K
21.75 mi12:29:142:25:516:424:50
6:28
#3859
23M
23.00 mi12:37:292:34:066:428:15
6:35
#3678
24M
24.00 mi12:43:502:40:276:416:21
6:21
#3501
40K
24.85 mi12:49:162:45:536:405:26
6:21
#3343
25.2M
25.20 mi12:51:322:48:096:402:16
6:34
#3244
Finish
26.22 mi12:57:402:54:176:396:08
6:01
#3062
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi6271573257325317(Top 19%)4905(Top 30%)4905(Top 246%)
10K6.21 mi3.10 mi5761+5105312+4205312+4205235(Top 18%)4856(Top 30%)4856(Top 243%)
15K9.32 mi3.11 mi5594+1675158+1545158+1545317(Top 19%)4905(Top 30%)4905(Top 246%)
20K12.43 mi3.11 mi5239+3554853+3054853+3054368(Top 15%)4082(Top 25%)4082(Top 205%)
Half13.11 mi0.68 mi5138+1014767+864767+863935(Top 14%)3699(Top 23%)3699(Top 185%)
25K15.53 mi2.42 mi4717+4214393+3744393+3743147(Top 11%)2981(Top 19%)2981(Top 149%)
30K18.64 mi3.11 mi4418+2994128+2654128+2653547(Top 12%)3292(Top 20%)3292(Top 165%)
20M20.00 mi1.36 mi4183+2353914+2143914+2142386(Top 8%)2253(Top 14%)2253(Top 113%)
21M21.00 mi1.00 mi3950+2333701+2133701+2131534(Top 5%)1445(Top 9%)1445(Top 72%)
35K21.75 mi0.75 mi3859+913618+833618+832268(Top 8%)2120(Top 13%)2120(Top 106%)
23M23.00 mi1.25 mi3678+1813450+1683450+1681786(Top 6%)1672(Top 10%)1672(Top 84%)
24M24.00 mi1.00 mi3501+1773285+1653285+1651489(Top 5%)1393(Top 9%)1393(Top 70%)
40K24.85 mi0.85 mi3343+1583144+1413144+1411117(Top 4%)1046(Top 6%)1046(Top 52%)
25.2M25.20 mi0.35 mi3244+993054+903054+90584(Top 2%)544(Top 3%)544(Top 27%)
Finish26.22 mi1.02 mi3062+1822884+1702884+170966(Top 3%)908(Top 6%)908(Top 45%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21story building
+97ft-345ft

Overall

5317

Males

4905

M50-54

4905

5K→10K

3.1 - 6.2 mi

Top 18%
×5story building
+79ft-138ft

Overall

5235

Males

4856

M50-54

4856

10K→15K

6.2 - 9.3 mi

Top 19%
×3story building
+67ft-78ft

Overall

5317

Males

4905

M50-54

4905

15K→20K

9.3 - 12.4 mi

Top 15%
×5story building
+106ft-86ft

Overall

4368

Males

4082

M50-54

4082

20K→Half

12.4 - 13.1 mi

Top 14%
×2story building
+19ft-37ft

Overall

3935

Males

3699

M50-54

3699

Half→25K

13.1 - 15.5 mi

Top 11%
×4story building
+66ft-88ft

Overall

3147

Males

2981

M50-54

2981

25K→30K

15.5 - 18.6 mi

Top 12%
×9story building
+181ft-148ft

Overall

3547

Males

3292

M50-54

3292

30K→20M

18.6 - 20.0 mi

Top 8%
×5story building
+64ft-50ft

Overall

2386

Males

2253

M50-54

2253

20M→21M

20.0 - 21.0 mi

Top 5%
×8story building
+106ft-24ft

Overall

1534

Males

1445

M50-54

1445

21M→35K

21.0 - 21.8 mi

Top 8%
×7story building
+17ft-86ft

Overall

2268

Males

2120

M50-54

2120

35K→23M

21.8 - 23.0 mi

Top 6%
×5story building
+23ft-63ft

Overall

1786

Males

1672

M50-54

1672

23M→24M

23.0 - 24.0 mi

Top 5%
×6story building
+12ft-82ft

Overall

1489

Males

1393

M50-54

1393

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1117

Males

1046

M50-54

1046

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

584

Males

544

M50-54

544

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2story building
+22ft-21ft

Overall

966

Males

908

M50-54

908

Passing Analysis

Category:
Athletes Passed
3330
Passed By
121
Net Change
+3209
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6271
5K → 10K53929+510#6271#5761
10K → 15K21750+167#5761#5594
15K → 20K3638+355#5594#5239
20K → Half1054+101#5239#5138
Half → 25K4221+421#5138#4717
25K → 30K32021+299#4717#4418
30K → 20M2372+235#4418#4183
20M → 21M2330+233#4183#3950
21M → 35K932+91#3950#3859
35K → 23M1821+181#3859#3678
23M → 24M1770+177#3678#3501
24M → 40K1591+158#3501#3343
40K → 25.2M1001+99#3343#3244
25.2M → Finish1831+182#3244#3062
TOTALS3330121+3209
📊

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