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BOSTON MARATHON 2025

Kathleen Cosman

Bib: 27128•F

MA

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:41/mi
30:04
↑ 97↓ 3451.5%
10K· 6.21 mi
10:05/mi
1:01:23
↑ 79↓ 1380.4%
15K· 9.32 mi
10:32/mi
1:34:06
↑ 67↓ 78
20K· 12.43 mi
12:33/mi
2:13:04
↑ 106↓ 860.1%
Half· 13.11 mi
11:24/mi
2:20:51
↑ 19↓ 370.5%
25K· 15.53 mi
14:57/mi
2:57:06
↑ 66↓ 880.2%
30K· 18.64 mi
20:46/mi
4:01:36
↑ 181↓ 1480.2%
20M
12:18/mi
4:18:19
↑ 64↓ 500.2%
21M
15:30/mi
4:33:49
↑ 106↓ 241.6%
35K· 21.75 mi
11:32/mi
4:42:27
↑ 17↓ 861.7%
23M
18:05/mi
5:05:05
↑ 23↓ 630.6%
24M
11:04/mi
5:16:09
↓ 821.3%
40K· 24.85 mi
12:43/mi
5:27:01
↓ 200.3%
25.2M
12:54/mi
5:31:28
↑ 13↓ 160.2%
Finish· 26.22 mi
12:10/mi
5:43:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:20:51
Pace10:45 /mi
2nd Half
Distance13.11 mi
Time3:23:01
Pace15:29 /mi
📊Positive Split: 44.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:4830:049:4130:04
9:41
-
10K
6.21 mi12:22:071:01:239:5331:19
10:05
+0:24
15K
9.32 mi12:54:501:34:0610:0632:43
10:32
+0:27
20K
12.43 mi13:33:482:13:0410:4238:58
12:33
+2:01
Half
13.11 mi13:41:352:20:5110:457:47
11:24
-1:09
25K
15.53 mi14:17:502:57:0611:2436:15
14:57
+3:33
30K
18.64 mi15:22:204:01:3612:581:04:30
20:46
+5:49
20M
20.00 mi15:39:034:18:1912:5516:43
12:18
-8:28
21M
21.00 mi15:54:334:33:4913:0215:30
15:30
+3:12
35K
21.75 mi16:03:114:42:2712:598:38
11:32
-3:58
23M
23.00 mi16:25:495:05:0513:1622:38
18:05
+6:33
24M
24.00 mi16:36:535:16:0913:1011:04
11:04
-7:01
40K
24.85 mi16:47:455:27:0113:0910:52
12:43
+1:39
25.2M
25.20 mi16:52:125:31:2813:094:27
12:54
+0:11
Finish
26.22 mi17:04:365:43:5213:0712:24
12:10
-0:44

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

9:41 /mi

Average Pace

13:07 /mi

Slowest Pace

20:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:06

27% of race

Time at Steady Pace

1:50:53

32% of race

Time at Slower Pace

2:18:53

40% of race

Average Pace: 13:07 /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 mi11:50:4830:049:4130:04
9:41
#24775
10K
6.21 mi12:22:071:01:239:5331:19
10:05
#25135
15K
9.32 mi12:54:501:34:0610:0632:43
10:32
#25515
20K
12.43 mi13:33:482:13:0410:4238:58
12:33
#26332
Half
13.11 mi13:41:352:20:5110:457:47
11:24
#26391
25K
15.53 mi14:17:502:57:0611:2436:15
14:57
#27012
30K
18.64 mi15:22:204:01:3612:581:04:30
20:46
#28043
20M
20.00 mi15:39:034:18:1912:5516:43
12:18
#27940
21M
21.00 mi15:54:334:33:4913:0215:30
15:30
#27938
35K
21.75 mi16:03:114:42:2712:598:38
11:32
#27883
23M
23.00 mi16:25:495:05:0513:1622:38
18:05
#28020
24M
24.00 mi16:36:535:16:0913:1011:04
11:04
#27936
40K
24.85 mi16:47:455:27:0113:0910:52
12:43
#27881
25.2M
25.20 mi16:52:125:31:2813:094:27
12:54
#27861
Finish
26.22 mi17:04:365:43:5213:0712:24
12:10
#27843
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24775101001010025997(Top 92%)10789(Top 88%)10789(Top 197%)
10K6.21 mi3.10 mi25135-36010300-20010300-20025479(Top 90%)10512(Top 86%)10512(Top 192%)
15K9.32 mi3.11 mi25515-38010507-20710507-20725997(Top 92%)10789(Top 88%)10789(Top 197%)
20K12.43 mi3.11 mi26332-81710967-46010967-46027551(Top 97%)11728(Top 96%)11728(Top 214%)
Half13.11 mi0.68 mi26391-5911001-3411001-3426976(Top 95%)11398(Top 93%)11398(Top 208%)
25K15.53 mi2.42 mi27012-62111389-38811389-38828219(Top 99%)12135(Top 99%)12135(Top 222%)
30K18.64 mi3.11 mi28043-103112011-62212011-62228396(Top 100%)12224(Top 100%)12224(Top 224%)
20M20.00 mi1.36 mi27940+10311960+5111960+5125669(Top 90%)10833(Top 89%)10833(Top 198%)
21M21.00 mi1.00 mi27938+211962-211962-227535(Top 97%)11833(Top 97%)11833(Top 216%)
35K21.75 mi0.75 mi27883+5511932+3011932+3025148(Top 89%)10670(Top 87%)10670(Top 195%)
23M23.00 mi1.25 mi28020-13712014-8212014-8228331(Top 100%)12209(Top 100%)12209(Top 223%)
24M24.00 mi1.00 mi27936+8411973+4111973+4124120(Top 85%)10183(Top 83%)10183(Top 186%)
40K24.85 mi0.85 mi27881+5511948+2511948+2525940(Top 91%)11120(Top 91%)11120(Top 203%)
25.2M25.20 mi0.35 mi27861+2011943+511943+524875(Top 88%)10624(Top 87%)10624(Top 194%)
Finish26.22 mi1.02 mi27843+1811939+411939+426973(Top 95%)11617(Top 95%)11617(Top 212%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21story building
+97ft-345ft

Overall

25997

Females

10789

F18-39

10789

5K→10K

3.1 - 6.2 mi

Top 90%
×5story building
+79ft-138ft

Overall

25479

Females

10512

F18-39

10512

10K→15K

6.2 - 9.3 mi

Top 92%
×3story building
+67ft-78ft

Overall

25997

Females

10789

F18-39

10789

15K→20K

9.3 - 12.4 mi

Top 97%
×5story building
+106ft-86ft

Overall

27551

Females

11728

F18-39

11728

20K→Half

12.4 - 13.1 mi

Top 95%
×2story building
+19ft-37ft

Overall

26976

Females

11398

F18-39

11398

Half→25K

13.1 - 15.5 mi

Top 99%
×4story building
+66ft-88ft

Overall

28219

Females

12135

F18-39

12135

25K→30K

15.5 - 18.6 mi

Top 100%
×9story building
+181ft-148ft

Overall

28396

Females

12224

F18-39

12224

30K→20M

18.6 - 20.0 mi

Top 90%
×5story building
+64ft-50ft

Overall

25669

Females

10833

F18-39

10833

20M→21M

20.0 - 21.0 mi

Top 97%
×8story building
+106ft-24ft

Overall

27535

Females

11833

F18-39

11833

21M→35K

21.0 - 21.8 mi

Top 89%
×7story building
+17ft-86ft

Overall

25148

Females

10670

F18-39

10670

35K→23M

21.8 - 23.0 mi

Top 100%
×5story building
+23ft-63ft

Overall

28331

Females

12209

F18-39

12209

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

24120

Females

10183

F18-39

10183

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

25940

Females

11120

F18-39

11120

40K→25.2M

24.9 - 25.2 mi

Top 88%
×1story
+13ft-16ft

Overall

24875

Females

10624

F18-39

10624

25.2M→Finish

25.2 - 26.2 mi

Top 95%
×2story building
+22ft-21ft

Overall

26973

Females

11617

F18-39

11617

Passing Analysis

Category:
Athletes Passed
506
Passed By
3574
Net Change
-3068
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24775
5K → 10K77437-360#24775#25135
10K → 15K40420-380#25135#25515
15K → 20K14831-817#25515#26332
20K → Half665-59#26332#26391
Half → 25K4625-621#26391#27012
25K → 30K21033-1031#27012#28043
30K → 20M1052+103#28043#27940
20M → 21M1614+2#27940#27938
21M → 35K561+55#27938#27883
35K → 23M3140-137#27883#28020
23M → 24M851+84#28020#27936
24M → 40K550+55#27936#27881
40K → 25.2M211+20#27881#27861
25.2M → Finish224+18#27861#27843
TOTALS5063574-3068
📊

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