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BOSTON MARATHON 2025

Sairung Niehaus

Bib: 22802•F

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0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:21
Rank: #24063
Start → 5K
29:21 | 9:27/mi
10K· 6.21 mi
57:40
Rank: #23486 (+577)
5K → 10K
28:19 | 9:07/mi
15K· 9.32 mi
1:27:00
Rank: #23557 (-71)
10K → 15K
29:20 | 9:26/mi
20K· 12.43 mi
1:58:03
Rank: #23743 (-186)
15K → 20K
31:03 | 10:00/mi
Half· 13.11 mi
2:04:32
Rank: #23735 (+8)
20K → Half
6:29 | 9:30/mi
25K· 15.53 mi
2:27:43
Rank: #23442 (+293)
Half → 25K
23:11 | 9:34/mi
30K· 18.64 mi
2:59:17
Rank: #23139 (+303)
25K → 30K
31:34 | 10:10/mi
20M
3:13:07
Rank: #23011 (+128)
30K → 20M
13:50 | 10:11/mi
21M
3:23:55
Rank: #22894 (+117)
20M → 21M
10:48 | 10:48/mi
35K· 21.75 mi
3:31:15
Rank: #22835 (+59)
21M → 35K
7:20 | 9:48/mi
23M
3:43:59
Rank: #22715 (+120)
35K → 23M
12:44 | 10:10/mi
24M
3:53:45
Rank: #22605 (+110)
23M → 24M
9:46 | 9:46/mi
40K· 24.85 mi
4:02:13
Rank: #22521 (+84)
24M → 40K
8:28 | 9:54/mi
25.2M
4:05:52
Rank: #22471 (+50)
40K → 25.2M
3:39 | 10:35/mi
Finish· 26.22 mi
4:15:44
Rank: #22444 (+27)
25.2M → Finish
9:52 | 9:41/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:32
Pace9:30 /mi
2nd Half
Distance13.11 mi
Time2:11:12
Pace10:01 /mi
📊Positive Split: 5.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:27:0329:219:2729:21
9:27
-
10K
6.21 mi11:55:2257:409:1728:19
9:07
-0:20
15K
9.32 mi12:24:421:27:009:2029:20
9:26
+0:19
20K
12.43 mi12:55:451:58:039:3031:03
10:00
+0:34
Half
13.11 mi13:02:142:04:329:306:29
9:30
-0:30
25K
15.53 mi13:25:252:27:439:3123:11
9:34
+0:04
30K
18.64 mi13:56:592:59:179:3731:34
10:10
+0:36
20M
20.00 mi14:10:493:13:079:3913:50
10:11
+0:01
21M
21.00 mi14:21:373:23:559:4310:48
10:48
+0:37
35K
21.75 mi14:28:573:31:159:437:20
9:48
-1:00
23M
23.00 mi14:41:413:43:599:4412:44
10:10
+0:22
24M
24.00 mi14:51:273:53:459:449:46
9:46
-0:24
40K
24.85 mi14:59:554:02:139:458:28
9:54
+0:08
25.2M
25.20 mi15:03:344:05:529:453:39
10:35
+0:41
Finish
26.22 mi15:13:264:15:449:469:52
9:41
-0:54

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

9:07 /mi

Average Pace

9:46 /mi

Slowest Pace

10:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:03:09

72% of race

Time at Steady Pace

1:01:47

24% of race

Time at Slower Pace

10:48

4% of race

Average Pace: 9:45 /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 mi11:27:0329:219:2729:21
9:27
#24063
10K
6.21 mi11:55:2257:409:1728:19
9:07
#23486
15K
9.32 mi12:24:421:27:009:2029:20
9:26
#23557
20K
12.43 mi12:55:451:58:039:3031:03
10:00
#23743
Half
13.11 mi13:02:142:04:329:306:29
9:30
#23735
25K
15.53 mi13:25:252:27:439:3123:11
9:34
#23442
30K
18.64 mi13:56:592:59:179:3731:34
10:10
#23139
20M
20.00 mi14:10:493:13:079:3913:50
10:11
#23011
21M
21.00 mi14:21:373:23:559:4310:48
10:48
#22894
35K
21.75 mi14:28:573:31:159:437:20
9:48
#22835
23M
23.00 mi14:41:413:43:599:4412:44
10:10
#22715
24M
24.00 mi14:51:273:53:459:449:46
9:46
#22605
40K
24.85 mi14:59:554:02:139:458:28
9:54
#22521
25.2M
25.20 mi15:03:344:05:529:453:39
10:35
#22471
Finish
26.22 mi15:13:264:15:449:469:52
9:41
#22444
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi240639729972923580(Top 83%)9422(Top 77%)9422(Top 520%)
10K6.21 mi3.10 mi23486+5779411+3189411+31822881(Top 81%)9061(Top 74%)9061(Top 500%)
15K9.32 mi3.11 mi23557-719440-299440-2923580(Top 83%)9422(Top 77%)9422(Top 520%)
20K12.43 mi3.11 mi23743-1869544-1049544-10424205(Top 85%)9833(Top 80%)9833(Top 542%)
Half13.11 mi0.68 mi23735+89541+39541+323587(Top 83%)9474(Top 77%)9474(Top 523%)
25K15.53 mi2.42 mi23442+2939379+1629379+16222076(Top 78%)8695(Top 71%)8695(Top 480%)
30K18.64 mi3.11 mi23139+3039266+1139266+11322094(Top 78%)8816(Top 72%)8816(Top 486%)
20M20.00 mi1.36 mi23011+1289218+489218+4821525(Top 76%)8643(Top 71%)8643(Top 477%)
21M21.00 mi1.00 mi22894+1179171+479171+4720857(Top 73%)8381(Top 69%)8381(Top 462%)
35K21.75 mi0.75 mi22835+599151+209151+2021359(Top 75%)8705(Top 71%)8705(Top 480%)
23M23.00 mi1.25 mi22715+1209108+439108+4321043(Top 74%)8579(Top 70%)8579(Top 473%)
24M24.00 mi1.00 mi22605+1109075+339075+3320640(Top 73%)8421(Top 69%)8421(Top 464%)
40K24.85 mi0.85 mi22521+849042+339042+3320153(Top 71%)8241(Top 67%)8241(Top 455%)
25.2M25.20 mi0.35 mi22471+509023+199023+1919365(Top 68%)7853(Top 64%)7853(Top 433%)
Finish26.22 mi1.02 mi22444+279026-39026-321870(Top 77%)9095(Top 74%)9095(Top 502%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21stories
+97ft-345ft

Overall

23580

Females

9422

F45-49

9422

5K→10K

3.1 - 6.2 mi

Top 81%
×5stories
+79ft-138ft

Overall

22881

Females

9061

F45-49

9061

10K→15K

6.2 - 9.3 mi

Top 83%
×3stories
+67ft-78ft

Overall

23580

Females

9422

F45-49

9422

15K→20K

9.3 - 12.4 mi

Top 85%
×5stories
+106ft-86ft

Overall

24205

Females

9833

F45-49

9833

20K→Half

12.4 - 13.1 mi

Top 83%
×2stories
+19ft-37ft

Overall

23587

Females

9474

F45-49

9474

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

22076

Females

8695

F45-49

8695

25K→30K

15.5 - 18.6 mi

Top 78%
×9stories
+181ft-148ft

Overall

22094

Females

8816

F45-49

8816

30K→20M

18.6 - 20.0 mi

Top 76%
×5stories
+64ft-50ft

Overall

21525

Females

8643

F45-49

8643

20M→21M

20.0 - 21.0 mi

Top 73%
×8stories
+106ft-24ft

Overall

20857

Females

8381

F45-49

8381

21M→35K

21.0 - 21.8 mi

Top 75%
×7stories
+17ft-86ft

Overall

21359

Females

8705

F45-49

8705

35K→23M

21.8 - 23.0 mi

Top 74%
×5stories
+23ft-63ft

Overall

21043

Females

8579

F45-49

8579

23M→24M

23.0 - 24.0 mi

Top 73%
×6stories
+12ft-82ft

Overall

20640

Females

8421

F45-49

8421

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

20153

Females

8241

F45-49

8241

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

19365

Females

7853

F45-49

7853

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2stories
+22ft-21ft

Overall

21870

Females

9095

F45-49

9095

Passing Analysis

Category:
Athletes Passed
2347
Passed By
728
Net Change
+1619
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24063
5K → 10K63154+577#24063#23486
10K → 15K146217-71#23486#23557
15K → 20K84270-186#23557#23743
20K → Half2113+8#23743#23735
Half → 25K30512+293#23735#23442
25K → 30K34946+303#23442#23139
30K → 20M14517+128#23139#23011
20M → 21M13417+117#23011#22894
21M → 35K7617+59#22894#22835
35K → 23M14121+120#22835#22715
23M → 24M1166+110#22715#22605
24M → 40K939+84#22605#22521
40K → 25.2M522+50#22521#22471
25.2M → Finish5427+27#22471#22444
TOTALS2347728+1619
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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