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BOSTON MARATHON 2025

Setsuko Kuroiwa

Bib: 29403•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F60-64)
#0 / 624
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:00
Rank: #23674
Start → 5K
29:00 | 9:20/mi
10K· 6.21 mi
56:29
Rank: #22776 (+898)
5K → 10K
27:29 | 8:51/mi
15K· 9.32 mi
1:23:54
Rank: #22290 (+486)
10K → 15K
27:25 | 8:49/mi
20K· 12.43 mi
1:53:02
Rank: #22345 (-55)
15K → 20K
29:08 | 9:23/mi
Half· 13.11 mi
1:59:09
Rank: #22303 (+42)
20K → Half
6:07 | 8:58/mi
25K· 15.53 mi
2:24:24
Rank: #22777 (-474)
Half → 25K
25:15 | 10:25/mi
30K· 18.64 mi
3:00:53
Rank: #23417 (-640)
25K → 30K
36:29 | 11:45/mi
20M
3:17:45
Rank: #23690 (-273)
30K → 20M
16:52 | 12:25/mi
21M
3:31:34
Rank: #23926 (-236)
20M → 21M
13:49 | 13:49/mi
35K· 21.75 mi
3:39:50
Rank: #23949 (-23)
21M → 35K
8:16 | 11:03/mi
23M
3:54:42
Rank: #24012 (-63)
35K → 23M
14:52 | 11:52/mi
24M
4:05:59
Rank: #24040 (-28)
23M → 24M
11:17 | 11:17/mi
40K· 24.85 mi
4:16:21
Rank: #24122 (-82)
24M → 40K
10:22 | 12:07/mi
25.2M
4:20:49
Rank: #24136 (-14)
40K → 25.2M
4:28 | 12:57/mi
Finish· 26.22 mi
4:31:44
Rank: #24165 (-29)
25.2M → Finish
10:55 | 10:43/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:09
Pace9:05 /mi
2nd Half
Distance13.11 mi
Time2:32:35
Pace11:38 /mi
📊Positive Split: 28.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:5929:009:2029:00
9:20
-
10K
6.21 mi12:14:2856:299:0527:29
8:51
-0:29
15K
9.32 mi12:41:531:23:549:0027:25
8:49
-0:02
20K
12.43 mi13:11:011:53:029:0629:08
9:23
+0:34
Half
13.11 mi13:17:081:59:099:056:07
8:58
-0:25
25K
15.53 mi13:42:232:24:249:1825:15
10:25
+1:27
30K
18.64 mi14:18:523:00:539:4236:29
11:45
+1:20
20M
20.00 mi14:35:443:17:459:5316:52
12:25
+0:40
21M
21.00 mi14:49:333:31:3410:0413:49
13:49
+1:24
35K
21.75 mi14:57:493:39:5010:068:16
11:03
-2:46
23M
23.00 mi15:12:413:54:4210:1214:52
11:52
+0:49
24M
24.00 mi15:23:584:05:5910:1511:17
11:17
-0:35
40K
24.85 mi15:34:204:16:2110:1910:22
12:07
+0:50
25.2M
25.20 mi15:38:484:20:4910:214:28
12:57
+0:50
Finish
26.22 mi15:49:434:31:4410:2210:55
10:43
-2:14

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

8:49 /mi

Average Pace

10:22 /mi

Slowest Pace

13:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:59:09

44% of race

Time at Steady Pace

1:32:12

34% of race

Time at Slower Pace

1:00:23

22% of race

Average Pace: 10:22 /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 mi11:46:5929:009:2029:00
9:20
#23674
10K
6.21 mi12:14:2856:299:0527:29
8:51
#22776
15K
9.32 mi12:41:531:23:549:0027:25
8:49
#22290
20K
12.43 mi13:11:011:53:029:0629:08
9:23
#22345
Half
13.11 mi13:17:081:59:099:056:07
8:58
#22303
25K
15.53 mi13:42:232:24:249:1825:15
10:25
#22777
30K
18.64 mi14:18:523:00:539:4236:29
11:45
#23417
20M
20.00 mi14:35:443:17:459:5316:52
12:25
#23690
21M
21.00 mi14:49:333:31:3410:0413:49
13:49
#23926
35K
21.75 mi14:57:493:39:5010:068:16
11:03
#23949
23M
23.00 mi15:12:413:54:4210:1214:52
11:52
#24012
24M
24.00 mi15:23:584:05:5910:1511:17
11:17
#24040
40K
24.85 mi15:34:204:16:2110:1910:22
12:07
#24122
25.2M
25.20 mi15:38:484:20:4910:214:28
12:57
#24136
Finish
26.22 mi15:49:434:31:4410:2210:55
10:43
#24165
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi236749519951921162(Top 75%)8094(Top 66%)8094(Top 1297%)
10K6.21 mi3.10 mi22776+8989032+4879032+48721637(Top 76%)8391(Top 69%)8391(Top 1345%)
15K9.32 mi3.11 mi22290+4868749+2838749+28321162(Top 75%)8094(Top 66%)8094(Top 1297%)
20K12.43 mi3.11 mi22345-558785-368785-3622510(Top 79%)8871(Top 73%)8871(Top 1422%)
Half13.11 mi0.68 mi22303+428768+178768+1721732(Top 77%)8451(Top 69%)8451(Top 1354%)
25K15.53 mi2.42 mi22777-4749022-2549022-25424212(Top 85%)9859(Top 81%)9859(Top 1580%)
30K18.64 mi3.11 mi23417-6409412-3909412-39025213(Top 89%)10516(Top 86%)10516(Top 1685%)
20M20.00 mi1.36 mi23690-2739593-1819593-18125811(Top 91%)10908(Top 89%)10908(Top 1748%)
21M21.00 mi1.00 mi23926-2369724-1319724-13126033(Top 92%)11064(Top 90%)11064(Top 1773%)
35K21.75 mi0.75 mi23949-239757-339757-3324328(Top 86%)10238(Top 84%)10238(Top 1641%)
23M23.00 mi1.25 mi24012-639802-459802-4524931(Top 88%)10565(Top 86%)10565(Top 1693%)
24M24.00 mi1.00 mi24040-289833-319833-3124543(Top 86%)10404(Top 85%)10404(Top 1667%)
40K24.85 mi0.85 mi24122-829895-629895-6225126(Top 88%)10731(Top 88%)10731(Top 1720%)
25.2M25.20 mi0.35 mi24136-149906-119906-1124991(Top 88%)10677(Top 87%)10677(Top 1711%)
Finish26.22 mi1.02 mi24165-299924-189924-1824767(Top 87%)10541(Top 86%)10541(Top 1689%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21stories
+97ft-345ft

Overall

21162

Females

8094

F60-64

8094

5K→10K

3.1 - 6.2 mi

Top 76%
×5stories
+79ft-138ft

Overall

21637

Females

8391

F60-64

8391

10K→15K

6.2 - 9.3 mi

Top 75%
×3stories
+67ft-78ft

Overall

21162

Females

8094

F60-64

8094

15K→20K

9.3 - 12.4 mi

Top 79%
×5stories
+106ft-86ft

Overall

22510

Females

8871

F60-64

8871

20K→Half

12.4 - 13.1 mi

Top 77%
×2stories
+19ft-37ft

Overall

21732

Females

8451

F60-64

8451

Half→25K

13.1 - 15.5 mi

Top 85%
×4stories
+66ft-88ft

Overall

24212

Females

9859

F60-64

9859

25K→30K

15.5 - 18.6 mi

Top 89%
×9stories
+181ft-148ft

Overall

25213

Females

10516

F60-64

10516

30K→20M

18.6 - 20.0 mi

Top 91%
×5stories
+64ft-50ft

Overall

25811

Females

10908

F60-64

10908

20M→21M

20.0 - 21.0 mi

Top 92%
×8stories
+106ft-24ft

Overall

26033

Females

11064

F60-64

11064

21M→35K

21.0 - 21.8 mi

Top 86%
×7stories
+17ft-86ft

Overall

24328

Females

10238

F60-64

10238

35K→23M

21.8 - 23.0 mi

Top 88%
×5stories
+23ft-63ft

Overall

24931

Females

10565

F60-64

10565

23M→24M

23.0 - 24.0 mi

Top 86%
×6stories
+12ft-82ft

Overall

24543

Females

10404

F60-64

10404

24M→40K

24.0 - 24.9 mi

Top 88%
×1story
+6ft-20ft

Overall

25126

Females

10731

F60-64

10731

40K→25.2M

24.9 - 25.2 mi

Top 88%
×1story
+13ft-16ft

Overall

24991

Females

10677

F60-64

10677

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2stories
+22ft-21ft

Overall

24767

Females

10541

F60-64

10541

Passing Analysis

Category:
Athletes Passed
1939
Passed By
2430
Net Change
-491
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23674
5K → 10K91113+898#23674#22776
10K → 15K51327+486#22776#22290
15K → 20K159214-55#22290#22345
20K → Half5513+42#22345#22303
Half → 25K43517-474#22303#22777
25K → 30K38678-640#22777#23417
30K → 20M21294-273#23417#23690
20M → 21M17253-236#23690#23926
21M → 35K4164-23#23926#23949
35K → 23M44107-63#23949#24012
23M → 24M3765-28#24012#24040
24M → 40K21103-82#24040#24122
40K → 25.2M1226-14#24122#24136
25.2M → Finish2756-29#24136#24165
TOTALS19392430-491
📊

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