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BOSTON MARATHON 2025

Kathryn Leahy

Bib: 15537•F

WA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 45%
Gender (Female)
#0 / 12228
Top 29%
Division (F18-39)
#0 / 5469
Top 48%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:30
Rank: #12811
Start → 5K
23:30 | 7:34/mi
10K· 6.21 mi
47:30
Rank: #13448 (-637)
5K → 10K
24:00 | 7:43/mi
15K· 9.32 mi
1:12:08
Rank: #14108 (-660)
10K → 15K
24:38 | 7:56/mi
20K· 12.43 mi
1:36:20
Rank: #13821 (+287)
15K → 20K
24:12 | 7:47/mi
Half· 13.11 mi
1:41:31
Rank: #13745 (+76)
20K → Half
5:11 | 7:36/mi
25K· 15.53 mi
2:02:07
Rank: #14394 (-649)
Half → 25K
20:36 | 8:30/mi
30K· 18.64 mi
2:27:01
Rank: #13777 (+617)
25K → 30K
24:54 | 8:01/mi
20M
2:38:32
Rank: #13732 (+45)
30K → 20M
11:31 | 8:28/mi
21M
2:47:20
Rank: #13613 (+119)
20M → 21M
8:48 | 8:48/mi
35K· 21.75 mi
2:53:06
Rank: #13474 (+139)
21M → 35K
5:46 | 7:42/mi
23M
3:03:02
Rank: #13209 (+265)
35K → 23M
9:56 | 7:56/mi
24M
3:10:45
Rank: #13023 (+186)
23M → 24M
7:43 | 7:43/mi
40K· 24.85 mi
3:17:34
Rank: #12887 (+136)
24M → 40K
6:49 | 7:58/mi
25.2M
3:20:33
Rank: #12823 (+64)
40K → 25.2M
2:59 | 8:39/mi
Finish· 26.22 mi
3:28:12
Rank: #12656 (+167)
25.2M → Finish
7:39 | 7:30/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:31
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time1:46:41
Pace8:08 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:5323:307:3423:30
7:34
-
10K
6.21 mi11:20:5347:307:3924:00
7:43
+0:09
15K
9.32 mi11:45:311:12:087:4424:38
7:56
+0:13
20K
12.43 mi12:09:431:36:207:4524:12
7:47
-0:09
Half
13.11 mi12:14:541:41:317:455:11
7:36
-0:11
25K
15.53 mi12:35:302:02:077:5220:36
8:30
+0:54
30K
18.64 mi13:00:242:27:017:5324:54
8:01
-0:29
20M
20.00 mi13:11:552:38:327:5611:31
8:28
+0:27
21M
21.00 mi13:20:432:47:207:588:48
8:48
+0:20
35K
21.75 mi13:26:292:53:067:585:46
7:42
-1:06
23M
23.00 mi13:36:253:03:027:579:56
7:56
+0:14
24M
24.00 mi13:44:083:10:457:577:43
7:43
-0:13
40K
24.85 mi13:50:573:17:347:576:49
7:58
+0:15
25.2M
25.20 mi13:53:563:20:337:582:59
8:39
+0:41
Finish
26.22 mi14:01:353:28:127:577:39
7:30
-1:09

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

7:30 /mi

Average Pace

7:57 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:44:18

79% of race

Time at Steady Pace

43:54

21% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:56 /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 mi10:56:5323:307:3423:30
7:34
#12811
10K
6.21 mi11:20:5347:307:3924:00
7:43
#13448
15K
9.32 mi11:45:311:12:087:4424:38
7:56
#14108
20K
12.43 mi12:09:431:36:207:4524:12
7:47
#13821
Half
13.11 mi12:14:541:41:317:455:11
7:36
#13745
25K
15.53 mi12:35:302:02:077:5220:36
8:30
#14394
30K
18.64 mi13:00:242:27:017:5324:54
8:01
#13777
20M
20.00 mi13:11:552:38:327:5611:31
8:28
#13732
21M
21.00 mi13:20:432:47:207:588:48
8:48
#13613
35K
21.75 mi13:26:292:53:067:585:46
7:42
#13474
23M
23.00 mi13:36:253:03:027:579:56
7:56
#13209
24M
24.00 mi13:44:083:10:457:577:43
7:43
#13023
40K
24.85 mi13:50:573:17:347:576:49
7:58
#12887
25.2M
25.20 mi13:53:563:20:337:582:59
8:39
#12823
Finish
26.22 mi14:01:353:28:127:577:39
7:30
#12656
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi128113216321615469(Top 54%)4836(Top 40%)4836(Top 88%)
10K6.21 mi3.10 mi13448-6373618-4023618-40214131(Top 50%)4035(Top 33%)4035(Top 74%)
15K9.32 mi3.11 mi14108-6604034-4164034-41615469(Top 54%)4836(Top 40%)4836(Top 88%)
20K12.43 mi3.11 mi13821+2873911+1233911+12313205(Top 46%)3658(Top 30%)3658(Top 67%)
Half13.11 mi0.68 mi13745+763882+293882+2912616(Top 44%)3300(Top 27%)3300(Top 60%)
25K15.53 mi2.42 mi14394-6494271-3894271-38917178(Top 60%)5955(Top 49%)5955(Top 109%)
30K18.64 mi3.11 mi13777+6173980+2913980+29111509(Top 41%)3045(Top 25%)3045(Top 56%)
20M20.00 mi1.36 mi13732+453983-33983-313634(Top 48%)4307(Top 35%)4307(Top 79%)
21M21.00 mi1.00 mi13613+1193957+263957+2612313(Top 43%)3764(Top 31%)3764(Top 69%)
35K21.75 mi0.75 mi13474+1393903+543903+5410204(Top 36%)2722(Top 22%)2722(Top 50%)
23M23.00 mi1.25 mi13209+2653789+1143789+1149578(Top 34%)2544(Top 21%)2544(Top 47%)
24M24.00 mi1.00 mi13023+1863716+733716+739271(Top 33%)2469(Top 20%)2469(Top 45%)
40K24.85 mi0.85 mi12887+1363672+443672+4410046(Top 35%)2958(Top 24%)2958(Top 54%)
25.2M25.20 mi0.35 mi12823+643645+273645+279815(Top 35%)2941(Top 24%)2941(Top 54%)
Finish26.22 mi1.02 mi12656+1673582+633582+639281(Top 33%)2668(Top 22%)2668(Top 49%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21stories
+97ft-345ft

Overall

15469

Females

4836

F18-39

4836

5K→10K

3.1 - 6.2 mi

Top 50%
×5stories
+79ft-138ft

Overall

14131

Females

4035

F18-39

4035

10K→15K

6.2 - 9.3 mi

Top 54%
×3stories
+67ft-78ft

Overall

15469

Females

4836

F18-39

4836

15K→20K

9.3 - 12.4 mi

Top 46%
×5stories
+106ft-86ft

Overall

13205

Females

3658

F18-39

3658

20K→Half

12.4 - 13.1 mi

Top 44%
×2stories
+19ft-37ft

Overall

12616

Females

3300

F18-39

3300

Half→25K

13.1 - 15.5 mi

Top 60%
×4stories
+66ft-88ft

Overall

17178

Females

5955

F18-39

5955

25K→30K

15.5 - 18.6 mi

Top 41%
×9stories
+181ft-148ft

Overall

11509

Females

3045

F18-39

3045

30K→20M

18.6 - 20.0 mi

Top 48%
×5stories
+64ft-50ft

Overall

13634

Females

4307

F18-39

4307

20M→21M

20.0 - 21.0 mi

Top 43%
×8stories
+106ft-24ft

Overall

12313

Females

3764

F18-39

3764

21M→35K

21.0 - 21.8 mi

Top 36%
×7stories
+17ft-86ft

Overall

10204

Females

2722

F18-39

2722

35K→23M

21.8 - 23.0 mi

Top 34%
×5stories
+23ft-63ft

Overall

9578

Females

2544

F18-39

2544

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

9271

Females

2469

F18-39

2469

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

10046

Females

2958

F18-39

2958

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

9815

Females

2941

F18-39

2941

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2stories
+22ft-21ft

Overall

9281

Females

2668

F18-39

2668

Passing Analysis

Category:
Athletes Passed
2585
Passed By
2430
Net Change
+155
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12811
5K → 10K91728-637#12811#13448
10K → 15K57717-660#13448#14108
15K → 20K35871+287#14108#13821
20K → Half826+76#13821#13745
Half → 25K56705-649#13745#14394
25K → 30K63417+617#14394#13777
30K → 20M13489+45#13777#13732
20M → 21M16243+119#13732#13613
21M → 35K1445+139#13613#13474
35K → 23M2716+265#13474#13209
23M → 24M1926+186#13209#13023
24M → 40K14913+136#13023#12887
40K → 25.2M728+64#12887#12823
25.2M → Finish18316+167#12823#12656
TOTALS25852430+155
📊

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