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BOSTON MARATHON 2025

Kailey Kennedy Slesar

Bib: 26650•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
9:48/mi
30:26
↑ 97↓ 3451.5%
10K· 6.21 mi
9:40/mi
1:00:27
↑ 79↓ 1380.4%
15K· 9.32 mi
9:52/mi
1:31:06
↑ 67↓ 78
20K· 12.43 mi
10:12/mi
2:02:47
↑ 106↓ 860.1%
Half· 13.11 mi
10:11/mi
2:09:44
↑ 19↓ 370.5%
25K· 15.53 mi
10:06/mi
2:34:14
↑ 66↓ 880.2%
30K· 18.64 mi
11:23/mi
3:09:37
↑ 181↓ 1480.2%
20M
13:01/mi
3:27:19
↑ 64↓ 500.2%
21M
13:11/mi
3:40:30
↑ 106↓ 241.6%
35K· 21.75 mi
10:34/mi
3:48:24
↑ 17↓ 861.7%
23M
11:47/mi
4:03:09
↑ 23↓ 630.6%
24M
9:40/mi
4:12:49
↓ 821.3%
40K· 24.85 mi
9:25/mi
4:20:52
↓ 200.3%
25.2M
10:21/mi
4:24:26
↑ 13↓ 160.2%
Finish· 26.22 mi
8:52/mi
4:33:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:09:44
Pace9:54 /mi
2nd Half
Distance13.11 mi
Time2:23:44
Pace10:58 /mi
📊Positive Split: 10.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:0930:269:4830:26
9:48
-
10K
6.21 mi12:19:101:00:279:4430:01
9:40
-0:08
15K
9.32 mi12:49:491:31:069:4630:39
9:52
+0:12
20K
12.43 mi13:21:302:02:479:5331:41
10:12
+0:20
Half
13.11 mi13:28:272:09:449:546:57
10:11
-0:01
25K
15.53 mi13:52:572:34:149:5624:30
10:06
-0:05
30K
18.64 mi14:28:203:09:3710:1035:23
11:23
+1:17
20M
20.00 mi14:46:023:27:1910:2217:42
13:01
+1:38
21M
21.00 mi14:59:133:40:3010:3013:11
13:11
+0:10
35K
21.75 mi15:07:073:48:2410:307:54
10:34
-2:37
23M
23.00 mi15:21:524:03:0910:3414:45
11:47
+1:13
24M
24.00 mi15:31:324:12:4910:329:40
9:40
-2:07
40K
24.85 mi15:39:354:20:5210:308:03
9:25
-0:15
25.2M
25.20 mi15:43:094:24:2610:303:34
10:21
+0:56
Finish
26.22 mi15:52:114:33:2810:269:02
8:52
-1:29

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

8:52 /mi

Average Pace

10:26 /mi

Slowest Pace

13:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

17:05

6% of race

Time at Steady Pace

2:55:22

64% of race

Time at Slower Pace

1:21:01

30% of race

Average Pace: 10:26 /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 mi11:49:0930:269:4830:26
9:48
#25083
10K
6.21 mi12:19:101:00:279:4430:01
9:40
#24810
15K
9.32 mi12:49:491:31:069:4630:39
9:52
#24763
20K
12.43 mi13:21:302:02:479:5331:41
10:12
#24714
Half
13.11 mi13:28:272:09:449:546:57
10:11
#24739
25K
15.53 mi13:52:572:34:149:5624:30
10:06
#24570
30K
18.64 mi14:28:203:09:3710:1035:23
11:23
#24610
20M
20.00 mi14:46:023:27:1910:2217:42
13:01
#24813
21M
21.00 mi14:59:133:40:3010:3013:11
13:11
#24862
35K
21.75 mi15:07:073:48:2410:307:54
10:34
#24816
23M
23.00 mi15:21:524:03:0910:3414:45
11:47
#24837
24M
24.00 mi15:31:324:12:4910:329:40
9:40
#24680
40K
24.85 mi15:39:354:20:5210:308:03
9:25
#24531
25.2M
25.20 mi15:43:094:24:2610:303:34
10:21
#24479
Finish
26.22 mi15:52:114:33:2810:269:02
8:52
#24321
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25083102471024724698(Top 87%)10055(Top 82%)10055(Top 184%)
10K6.21 mi3.10 mi24810+27310129+11810129+11824514(Top 86%)9971(Top 82%)9971(Top 182%)
15K9.32 mi3.11 mi24763+4710094+3510094+3524698(Top 87%)10055(Top 82%)10055(Top 184%)
20K12.43 mi3.11 mi24714+4910078+1610078+1624639(Top 87%)10070(Top 82%)10070(Top 184%)
Half13.11 mi0.68 mi24739-2510089-1110089-1125240(Top 89%)10396(Top 85%)10396(Top 190%)
25K15.53 mi2.42 mi24570+16910013+7610013+7623528(Top 83%)9497(Top 78%)9497(Top 174%)
30K18.64 mi3.11 mi24610-4010066-5310066-5324681(Top 87%)10228(Top 84%)10228(Top 187%)
20M20.00 mi1.36 mi24813-20310190-12410190-12426466(Top 93%)11262(Top 92%)11262(Top 206%)
21M21.00 mi1.00 mi24862-4910233-4310233-4325302(Top 89%)10719(Top 88%)10719(Top 196%)
35K21.75 mi0.75 mi24816+4610213+2010213+2023310(Top 82%)9713(Top 79%)9713(Top 178%)
23M23.00 mi1.25 mi24837-2110237-2410237-2424736(Top 87%)10465(Top 86%)10465(Top 191%)
24M24.00 mi1.00 mi24680+15710172+6510172+6520303(Top 71%)8250(Top 67%)8250(Top 151%)
40K24.85 mi0.85 mi24531+14910100+7210100+7218394(Top 65%)7343(Top 60%)7343(Top 134%)
25.2M25.20 mi0.35 mi24479+5210077+2310077+2318527(Top 65%)7416(Top 61%)7416(Top 136%)
Finish26.22 mi1.02 mi24321+15810004+7310004+7318407(Top 65%)7305(Top 60%)7305(Top 134%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21story building
+97ft-345ft

Overall

24698

Females

10055

F18-39

10055

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

24514

Females

9971

F18-39

9971

10K→15K

6.2 - 9.3 mi

Top 87%
×3story building
+67ft-78ft

Overall

24698

Females

10055

F18-39

10055

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

24639

Females

10070

F18-39

10070

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

25240

Females

10396

F18-39

10396

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

23528

Females

9497

F18-39

9497

25K→30K

15.5 - 18.6 mi

Top 87%
×9story building
+181ft-148ft

Overall

24681

Females

10228

F18-39

10228

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

26466

Females

11262

F18-39

11262

20M→21M

20.0 - 21.0 mi

Top 89%
×8story building
+106ft-24ft

Overall

25302

Females

10719

F18-39

10719

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23310

Females

9713

F18-39

9713

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

24736

Females

10465

F18-39

10465

23M→24M

23.0 - 24.0 mi

Top 71%
×6story building
+12ft-82ft

Overall

20303

Females

8250

F18-39

8250

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

18394

Females

7343

F18-39

7343

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

18527

Females

7416

F18-39

7416

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2story building
+22ft-21ft

Overall

18407

Females

7305

F18-39

7305

Passing Analysis

Category:
Athletes Passed
1673
Passed By
911
Net Change
+762
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25083
5K → 10K36390+273#25083#24810
10K → 15K154107+47#24810#24763
15K → 20K163114+49#24763#24714
20K → Half1641-25#24714#24739
Half → 25K19021+169#24739#24570
25K → 30K122162-40#24570#24610
30K → 20M18221-203#24610#24813
20M → 21M3281-49#24813#24862
21M → 35K5913+46#24862#24816
35K → 23M3960-21#24816#24837
23M → 24M1570+157#24837#24680
24M → 40K1490+149#24680#24531
40K → 25.2M531+52#24531#24479
25.2M → Finish1580+158#24479#24321
TOTALS1673911+762
📊

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