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BOSTON MARATHON 2025

Nicole Koors

Bib: 16377•F

KY

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 50%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:51
Rank: #13784
Start → 5K
23:51 | 7:41/mi
10K· 6.21 mi
47:32
Rank: #13510 (+274)
5K → 10K
23:41 | 7:37/mi
15K· 9.32 mi
1:11:40
Rank: #13663 (-153)
10K → 15K
24:08 | 7:46/mi
20K· 12.43 mi
1:36:29
Rank: #13940 (-277)
15K → 20K
24:49 | 7:59/mi
Half· 13.11 mi
1:41:56
Rank: #14045 (-105)
20K → Half
5:27 | 7:59/mi
25K· 15.53 mi
2:01:32
Rank: #14075 (-30)
Half → 25K
19:36 | 8:05/mi
30K· 18.64 mi
2:28:45
Rank: #14534 (-459)
25K → 30K
27:13 | 8:46/mi
20M
2:41:15
Rank: #14846 (-312)
30K → 20M
12:30 | 9:12/mi
21M
2:51:12
Rank: #15055 (-209)
20M → 21M
9:57 | 9:57/mi
35K· 21.75 mi
2:58:03
Rank: #15204 (-149)
21M → 35K
6:51 | 9:09/mi
23M
3:10:40
Rank: #15649 (-445)
35K → 23M
12:37 | 10:05/mi
24M
3:23:10
Rank: #16660 (-1011)
23M → 24M
12:30 | 12:30/mi
40K· 24.85 mi
3:32:24
Rank: #17064 (-404)
24M → 40K
9:14 | 10:48/mi
25.2M
3:35:48
Rank: #17046 (+18)
40K → 25.2M
3:24 | 9:52/mi
Finish· 26.22 mi
3:44:50
Rank: #17090 (-44)
25.2M → Finish
9:02 | 8:52/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:56
Pace7:47 /mi
2nd Half
Distance13.11 mi
Time2:02:54
Pace9:23 /mi
📊Positive Split: 20.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:5223:517:4123:51
7:41
-
10K
6.21 mi11:21:3347:327:3923:41
7:37
-0:04
15K
9.32 mi11:45:411:11:407:4124:08
7:46
+0:09
20K
12.43 mi12:10:301:36:297:4624:49
7:59
+0:13
Half
13.11 mi12:15:571:41:567:475:27
7:59
0:00
25K
15.53 mi12:35:332:01:327:4919:36
8:05
+0:06
30K
18.64 mi13:02:462:28:457:5927:13
8:46
+0:41
20M
20.00 mi13:15:162:41:158:0412:30
9:12
+0:26
21M
21.00 mi13:25:132:51:128:099:57
9:57
+0:45
35K
21.75 mi13:32:042:58:038:116:51
9:09
-0:48
23M
23.00 mi13:44:413:10:408:1712:37
10:05
+0:56
24M
24.00 mi13:57:113:23:108:2812:30
12:30
+2:25
40K
24.85 mi14:06:253:32:248:339:14
10:48
-1:42
25.2M
25.20 mi14:09:493:35:488:343:24
9:52
-0:56
Finish
26.22 mi14:18:513:44:508:359:02
8:52
-1:00

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

7:37 /mi

Average Pace

8:35 /mi

Slowest Pace

12:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:01:32

54% of race

Time at Steady Pace

55:36

25% of race

Time at Slower Pace

47:42

21% of race

Average Pace: 8:34 /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 mi10:57:5223:517:4123:51
7:41
#13784
10K
6.21 mi11:21:3347:327:3923:41
7:37
#13510
15K
9.32 mi11:45:411:11:407:4124:08
7:46
#13663
20K
12.43 mi12:10:301:36:297:4624:49
7:59
#13940
Half
13.11 mi12:15:571:41:567:475:27
7:59
#14045
25K
15.53 mi12:35:332:01:327:4919:36
8:05
#14075
30K
18.64 mi13:02:462:28:457:5927:13
8:46
#14534
20M
20.00 mi13:15:162:41:158:0412:30
9:12
#14846
21M
21.00 mi13:25:132:51:128:099:57
9:57
#15055
35K
21.75 mi13:32:042:58:038:116:51
9:09
#15204
23M
23.00 mi13:44:413:10:408:1712:37
10:05
#15649
24M
24.00 mi13:57:113:23:108:2812:30
12:30
#16660
40K
24.85 mi14:06:253:32:248:339:14
10:48
#17064
25.2M
25.20 mi14:09:493:35:488:343:24
9:52
#17046
Finish
26.22 mi14:18:513:44:508:359:02
8:52
#17090
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi137843769376914121(Top 50%)4093(Top 33%)4093(Top 75%)
10K6.21 mi3.10 mi13510+2743651+1183651+11813252(Top 47%)3529(Top 29%)3529(Top 65%)
15K9.32 mi3.11 mi13663-1533779-1283779-12814121(Top 50%)4093(Top 33%)4093(Top 75%)
20K12.43 mi3.11 mi13940-2773969-1903969-19014863(Top 52%)4576(Top 37%)4576(Top 84%)
Half13.11 mi0.68 mi14045-1054029-604029-6015896(Top 56%)5131(Top 42%)5131(Top 94%)
25K15.53 mi2.42 mi14075-304088-594088-5914552(Top 51%)4517(Top 37%)4517(Top 83%)
30K18.64 mi3.11 mi14534-4594409-3214409-32116373(Top 58%)5675(Top 46%)5675(Top 104%)
20M20.00 mi1.36 mi14846-3124609-2004609-20017783(Top 63%)6581(Top 54%)6581(Top 120%)
21M21.00 mi1.00 mi15055-2094755-1464755-14618118(Top 64%)6855(Top 56%)6855(Top 125%)
35K21.75 mi0.75 mi15204-1494854-994854-9918997(Top 67%)7448(Top 61%)7448(Top 136%)
23M23.00 mi1.25 mi15649-4455162-3085162-30820734(Top 73%)8418(Top 69%)8418(Top 154%)
24M24.00 mi1.00 mi16660-10115749-5875749-58726312(Top 93%)11273(Top 92%)11273(Top 206%)
40K24.85 mi0.85 mi17064-4046024-2756024-27522681(Top 80%)9540(Top 78%)9540(Top 174%)
25.2M25.20 mi0.35 mi17046+186031-76031-716437(Top 58%)6298(Top 52%)6298(Top 115%)
Finish26.22 mi1.02 mi17090-446066-356066-3518376(Top 65%)7274(Top 59%)7274(Top 133%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

14121

Females

4093

F18-39

4093

5K→10K

3.1 - 6.2 mi

Top 47%
×5stories
+79ft-138ft

Overall

13252

Females

3529

F18-39

3529

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

14121

Females

4093

F18-39

4093

15K→20K

9.3 - 12.4 mi

Top 52%
×5stories
+106ft-86ft

Overall

14863

Females

4576

F18-39

4576

20K→Half

12.4 - 13.1 mi

Top 56%
×2stories
+19ft-37ft

Overall

15896

Females

5131

F18-39

5131

Half→25K

13.1 - 15.5 mi

Top 51%
×4stories
+66ft-88ft

Overall

14552

Females

4517

F18-39

4517

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

16373

Females

5675

F18-39

5675

30K→20M

18.6 - 20.0 mi

Top 63%
×5stories
+64ft-50ft

Overall

17783

Females

6581

F18-39

6581

20M→21M

20.0 - 21.0 mi

Top 64%
×8stories
+106ft-24ft

Overall

18118

Females

6855

F18-39

6855

21M→35K

21.0 - 21.8 mi

Top 67%
×7stories
+17ft-86ft

Overall

18997

Females

7448

F18-39

7448

35K→23M

21.8 - 23.0 mi

Top 73%
×5stories
+23ft-63ft

Overall

20734

Females

8418

F18-39

8418

23M→24M

23.0 - 24.0 mi

Top 93%
×6stories
+12ft-82ft

Overall

26312

Females

11273

F18-39

11273

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22681

Females

9540

F18-39

9540

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16437

Females

6298

F18-39

6298

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2stories
+22ft-21ft

Overall

18376

Females

7274

F18-39

7274

Passing Analysis

Category:
Athletes Passed
1333
Passed By
4639
Net Change
-3306
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13784
5K → 10K437163+274#13784#13510
10K → 15K163316-153#13510#13663
15K → 20K128405-277#13663#13940
20K → Half14119-105#13940#14045
Half → 25K160190-30#14045#14075
25K → 30K126585-459#14075#14534
30K → 20M63375-312#14534#14846
20M → 21M62271-209#14846#15055
21M → 35K33182-149#15055#15204
35K → 23M31476-445#15204#15649
23M → 24M31014-1011#15649#16660
24M → 40K20424-404#16660#17064
40K → 25.2M4325+18#17064#17046
25.2M → Finish5094-44#17046#17090
TOTALS13334639-3306
📊

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