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BOSTON MARATHON 2025

Naoko Ostermann

Bib: 22728•F

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:50
Rank: #24568
Start → 5K
29:50 | 9:36/mi
10K· 6.21 mi
1:01:16
Rank: #25091 (-523)
5K → 10K
31:26 | 10:07/mi
15K· 9.32 mi
1:33:36
Rank: #25398 (-307)
10K → 15K
32:20 | 10:24/mi
20K· 12.43 mi
2:06:58
Rank: #25469 (-71)
15K → 20K
33:22 | 10:44/mi
Half· 13.11 mi
2:13:52
Rank: #25433 (+36)
20K → Half
6:54 | 10:07/mi
25K· 15.53 mi
2:40:15
Rank: #25356 (+77)
Half → 25K
26:23 | 10:53/mi
30K· 18.64 mi
3:14:08
Rank: #25078 (+278)
25K → 30K
33:53 | 10:54/mi
20M
3:29:03
Rank: #24982 (+96)
30K → 20M
14:55 | 10:59/mi
21M
3:40:33
Rank: #24868 (+114)
20M → 21M
11:30 | 11:30/mi
35K· 21.75 mi
3:48:27
Rank: #24819 (+49)
21M → 35K
7:54 | 10:34/mi
23M
4:02:09
Rank: #24742 (+77)
35K → 23M
13:42 | 10:57/mi
24M
4:13:03
Rank: #24715 (+27)
23M → 24M
10:54 | 10:54/mi
40K· 24.85 mi
4:22:12
Rank: #24640 (+75)
24M → 40K
9:09 | 10:42/mi
25.2M
4:26:07
Rank: #24609 (+31)
40K → 25.2M
3:55 | 11:21/mi
Finish· 26.22 mi
4:36:13
Rank: #24549 (+60)
25.2M → Finish
10:06 | 9:55/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:13:52
Pace10:13 /mi
2nd Half
Distance13.11 mi
Time2:22:21
Pace10:52 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:5429:509:3629:50
9:36
-
10K
6.21 mi12:00:201:01:169:5231:26
10:07
+0:31
15K
9.32 mi12:32:401:33:3610:0332:20
10:24
+0:17
20K
12.43 mi13:06:022:06:5810:1333:22
10:44
+0:20
Half
13.11 mi13:12:562:13:5210:136:54
10:07
-0:37
25K
15.53 mi13:39:192:40:1510:1926:23
10:53
+0:46
30K
18.64 mi14:13:123:14:0810:2533:53
10:54
+0:01
20M
20.00 mi14:28:073:29:0310:2714:55
10:59
+0:05
21M
21.00 mi14:39:373:40:3310:3011:30
11:30
+0:31
35K
21.75 mi14:47:313:48:2710:307:54
10:34
-0:56
23M
23.00 mi15:01:134:02:0910:3213:42
10:57
+0:23
24M
24.00 mi15:12:074:13:0310:3310:54
10:54
-0:03
40K
24.85 mi15:21:164:22:1210:339:09
10:42
-0:12
25.2M
25.20 mi15:25:114:26:0710:343:55
11:21
+0:39
Finish
26.22 mi15:35:174:36:1310:3310:06
9:55
-1:26

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

9:36 /mi

Average Pace

10:33 /mi

Slowest Pace

11:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:36

40% of race

Time at Steady Pace

2:30:12

54% of race

Time at Slower Pace

15:25

6% of race

Average Pace: 10:32 /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 mi11:28:5429:509:3629:50
9:36
#24568
10K
6.21 mi12:00:201:01:169:5231:26
10:07
#25091
15K
9.32 mi12:32:401:33:3610:0332:20
10:24
#25398
20K
12.43 mi13:06:022:06:5810:1333:22
10:44
#25469
Half
13.11 mi13:12:562:13:5210:136:54
10:07
#25433
25K
15.53 mi13:39:192:40:1510:1926:23
10:53
#25356
30K
18.64 mi14:13:123:14:0810:2533:53
10:54
#25078
20M
20.00 mi14:28:073:29:0310:2714:55
10:59
#24982
21M
21.00 mi14:39:373:40:3310:3011:30
11:30
#24868
35K
21.75 mi14:47:313:48:2710:307:54
10:34
#24819
23M
23.00 mi15:01:134:02:0910:3213:42
10:57
#24742
24M
24.00 mi15:12:074:13:0310:3310:54
10:54
#24715
40K
24.85 mi15:21:164:22:1210:339:09
10:42
#24640
25.2M
25.20 mi15:25:114:26:0710:343:55
11:21
#24609
Finish
26.22 mi15:35:174:36:1310:3310:06
9:55
#24549
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi245689992999225776(Top 91%)10664(Top 87%)10664(Top 818%)
10K6.21 mi3.10 mi25091-52310273-28110273-28125568(Top 90%)10564(Top 86%)10564(Top 811%)
15K9.32 mi3.11 mi25398-30710440-16710440-16725776(Top 91%)10664(Top 87%)10664(Top 818%)
20K12.43 mi3.11 mi25469-7110495-5510495-5525610(Top 90%)10594(Top 87%)10594(Top 813%)
Half13.11 mi0.68 mi25433+3610474+2110474+2125088(Top 88%)10308(Top 84%)10308(Top 791%)
25K15.53 mi2.42 mi25356+7710448+2610448+2625026(Top 88%)10304(Top 84%)10304(Top 791%)
30K18.64 mi3.11 mi25078+27810321+12710321+12723842(Top 84%)9785(Top 80%)9785(Top 751%)
20M20.00 mi1.36 mi24982+9610284+3710284+3723544(Top 83%)9711(Top 79%)9711(Top 745%)
21M21.00 mi1.00 mi24868+11410238+4610238+4622630(Top 80%)9319(Top 76%)9319(Top 715%)
35K21.75 mi0.75 mi24819+4910216+2210216+2223312(Top 82%)9715(Top 79%)9715(Top 746%)
23M23.00 mi1.25 mi24742+7710186+3010186+3023111(Top 81%)9667(Top 79%)9667(Top 742%)
24M24.00 mi1.00 mi24715+2710193-710193-723783(Top 84%)10017(Top 82%)10017(Top 769%)
40K24.85 mi0.85 mi24640+7510163+3010163+3022473(Top 79%)9451(Top 77%)9451(Top 725%)
25.2M25.20 mi0.35 mi24609+3110147+1610147+1621729(Top 76%)9035(Top 74%)9035(Top 693%)
Finish26.22 mi1.02 mi24549+6010124+2310124+2322674(Top 80%)9509(Top 78%)9509(Top 730%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 91%
×21stories
+97ft-345ft

Overall

25776

Females

10664

F50-54

10664

5K→10K

3.1 - 6.2 mi

Top 90%
×5stories
+79ft-138ft

Overall

25568

Females

10564

F50-54

10564

10K→15K

6.2 - 9.3 mi

Top 91%
×3stories
+67ft-78ft

Overall

25776

Females

10664

F50-54

10664

15K→20K

9.3 - 12.4 mi

Top 90%
×5stories
+106ft-86ft

Overall

25610

Females

10594

F50-54

10594

20K→Half

12.4 - 13.1 mi

Top 88%
×2stories
+19ft-37ft

Overall

25088

Females

10308

F50-54

10308

Half→25K

13.1 - 15.5 mi

Top 88%
×4stories
+66ft-88ft

Overall

25026

Females

10304

F50-54

10304

25K→30K

15.5 - 18.6 mi

Top 84%
×9stories
+181ft-148ft

Overall

23842

Females

9785

F50-54

9785

30K→20M

18.6 - 20.0 mi

Top 83%
×5stories
+64ft-50ft

Overall

23544

Females

9711

F50-54

9711

20M→21M

20.0 - 21.0 mi

Top 80%
×8stories
+106ft-24ft

Overall

22630

Females

9319

F50-54

9319

21M→35K

21.0 - 21.8 mi

Top 82%
×7stories
+17ft-86ft

Overall

23312

Females

9715

F50-54

9715

35K→23M

21.8 - 23.0 mi

Top 81%
×5stories
+23ft-63ft

Overall

23111

Females

9667

F50-54

9667

23M→24M

23.0 - 24.0 mi

Top 84%
×6stories
+12ft-82ft

Overall

23783

Females

10017

F50-54

10017

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

22473

Females

9451

F50-54

9451

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21729

Females

9035

F50-54

9035

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2stories
+22ft-21ft

Overall

22674

Females

9509

F50-54

9509

Passing Analysis

Category:
Athletes Passed
1303
Passed By
1284
Net Change
+19
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24568
5K → 10K55578-523#24568#25091
10K → 15K57364-307#25091#25398
15K → 20K97168-71#25398#25469
20K → Half415+36#25469#25433
Half → 25K13255+77#25433#25356
25K → 30K29618+278#25356#25078
30K → 20M11014+96#25078#24982
20M → 21M12511+114#24982#24868
21M → 35K6112+49#24868#24819
35K → 23M8710+77#24819#24742
23M → 24M6134+27#24742#24715
24M → 40K838+75#24715#24640
40K → 25.2M343+31#24640#24609
25.2M → Finish644+60#24609#24549
TOTALS13031284+19
📊

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