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BOSTON MARATHON 2025

Leslie Semken

Bib: 17482•F

SC

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

Start
0:00:00
Race begins
5K· 3.11 mi
24:57
Rank: #16848
Start → 5K
24:57 | 8:02/mi
10K· 6.21 mi
50:19
Rank: #17247 (-399)
5K → 10K
25:22 | 8:10/mi
15K· 9.32 mi
1:16:05
Rank: #17516 (-269)
10K → 15K
25:46 | 8:18/mi
20K· 12.43 mi
1:42:52
Rank: #17868 (-352)
15K → 20K
26:47 | 8:37/mi
Half· 13.11 mi
1:48:44
Rank: #17949 (-81)
20K → Half
5:52 | 8:36/mi
25K· 15.53 mi
2:10:27
Rank: #18244 (-295)
Half → 25K
21:43 | 8:57/mi
30K· 18.64 mi
2:40:14
Rank: #18723 (-479)
25K → 30K
29:47 | 9:35/mi
20M
2:53:41
Rank: #18932 (-209)
30K → 20M
13:27 | 9:54/mi
21M
3:04:07
Rank: #18998 (-66)
20M → 21M
10:26 | 10:26/mi
35K· 21.75 mi
3:11:15
Rank: #19081 (-83)
21M → 35K
7:08 | 9:32/mi
23M
3:23:35
Rank: #19156 (-75)
35K → 23M
12:20 | 9:51/mi
24M
3:33:11
Rank: #19208 (-52)
23M → 24M
9:36 | 9:36/mi
40K· 24.85 mi
3:41:22
Rank: #19197 (+11)
24M → 40K
8:11 | 9:34/mi
25.2M
3:44:49
Rank: #19149 (+48)
40K → 25.2M
3:27 | 10:00/mi
Finish· 26.22 mi
3:53:59
Rank: #19138 (+11)
25.2M → Finish
9:10 | 9:00/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:44
Pace8:18 /mi
2nd Half
Distance13.11 mi
Time2:05:15
Pace9:33 /mi
📊Positive Split: 15.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2024:578:0224:57
8:02
-
10K
6.21 mi11:40:4250:198:0625:22
8:10
+0:08
15K
9.32 mi12:06:281:16:058:1025:46
8:18
+0:08
20K
12.43 mi12:33:151:42:528:1726:47
8:37
+0:19
Half
13.11 mi12:39:071:48:448:185:52
8:36
-0:01
25K
15.53 mi13:00:502:10:278:2421:43
8:57
+0:21
30K
18.64 mi13:30:372:40:148:3629:47
9:35
+0:38
20M
20.00 mi13:44:042:53:418:4113:27
9:54
+0:19
21M
21.00 mi13:54:303:04:078:4610:26
10:26
+0:32
35K
21.75 mi14:01:383:11:158:487:08
9:32
-0:54
23M
23.00 mi14:13:583:23:358:5112:20
9:51
+0:19
24M
24.00 mi14:23:343:33:118:539:36
9:36
-0:15
40K
24.85 mi14:31:453:41:228:548:11
9:34
-0:02
25.2M
25.20 mi14:35:123:44:498:553:27
10:00
+0:26
Finish
26.22 mi14:44:223:53:598:569:10
9:00
-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

8:02 /mi

Average Pace

8:56 /mi

Slowest Pace

10:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:19:37

60% of race

Time at Steady Pace

1:07:02

29% of race

Time at Slower Pace

27:20

12% of race

Average Pace: 8:55 /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 mi11:15:2024:578:0224:57
8:02
#16848
10K
6.21 mi11:40:4250:198:0625:22
8:10
#17247
15K
9.32 mi12:06:281:16:058:1025:46
8:18
#17516
20K
12.43 mi12:33:151:42:528:1726:47
8:37
#17868
Half
13.11 mi12:39:071:48:448:185:52
8:36
#17949
25K
15.53 mi13:00:502:10:278:2421:43
8:57
#18244
30K
18.64 mi13:30:372:40:148:3629:47
9:35
#18723
20M
20.00 mi13:44:042:53:418:4113:27
9:54
#18932
21M
21.00 mi13:54:303:04:078:4610:26
10:26
#18998
35K
21.75 mi14:01:383:11:158:487:08
9:32
#19081
23M
23.00 mi14:13:583:23:358:5112:20
9:51
#19156
24M
24.00 mi14:23:343:33:118:539:36
9:36
#19208
40K
24.85 mi14:31:453:41:228:548:11
9:34
#19197
25.2M
25.20 mi14:35:123:44:498:553:27
10:00
#19149
Finish
26.22 mi14:44:223:53:598:569:10
9:00
#19138
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi168485657565718021(Top 63%)6332(Top 52%)6332(Top 116%)
10K6.21 mi3.10 mi17247-3995876-2195876-21917672(Top 62%)6104(Top 50%)6104(Top 112%)
15K9.32 mi3.11 mi17516-2696024-1486024-14818021(Top 63%)6332(Top 52%)6332(Top 116%)
20K12.43 mi3.11 mi17868-3526261-2376261-23718977(Top 67%)6905(Top 56%)6905(Top 126%)
Half13.11 mi0.68 mi17949-816309-486309-4819849(Top 70%)7387(Top 60%)7387(Top 135%)
25K15.53 mi2.42 mi18244-2956496-1876496-18719718(Top 69%)7376(Top 60%)7376(Top 135%)
30K18.64 mi3.11 mi18723-4796784-2886784-28820304(Top 71%)7824(Top 64%)7824(Top 143%)
20M20.00 mi1.36 mi18932-2096937-1536937-15320612(Top 73%)8143(Top 67%)8143(Top 149%)
21M21.00 mi1.00 mi18998-667005-687005-6819805(Top 70%)7798(Top 64%)7798(Top 143%)
35K21.75 mi0.75 mi19081-837066-617066-6120455(Top 72%)8217(Top 67%)8217(Top 150%)
23M23.00 mi1.25 mi19156-757131-657131-6519966(Top 70%)8033(Top 66%)8033(Top 147%)
24M24.00 mi1.00 mi19208-527190-597190-5919996(Top 70%)8078(Top 66%)8078(Top 148%)
40K24.85 mi0.85 mi19197+117207-177207-1719012(Top 67%)7637(Top 62%)7637(Top 140%)
25.2M25.20 mi0.35 mi19149+487193+147193+1417134(Top 60%)6672(Top 55%)6672(Top 122%)
Finish26.22 mi1.02 mi19138+117208-157208-1519048(Top 67%)7627(Top 62%)7627(Top 139%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21stories
+97ft-345ft

Overall

18021

Females

6332

F18-39

6332

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

17672

Females

6104

F18-39

6104

10K→15K

6.2 - 9.3 mi

Top 63%
×3stories
+67ft-78ft

Overall

18021

Females

6332

F18-39

6332

15K→20K

9.3 - 12.4 mi

Top 67%
×5stories
+106ft-86ft

Overall

18977

Females

6905

F18-39

6905

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

19849

Females

7387

F18-39

7387

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

19718

Females

7376

F18-39

7376

25K→30K

15.5 - 18.6 mi

Top 71%
×9stories
+181ft-148ft

Overall

20304

Females

7824

F18-39

7824

30K→20M

18.6 - 20.0 mi

Top 73%
×5stories
+64ft-50ft

Overall

20612

Females

8143

F18-39

8143

20M→21M

20.0 - 21.0 mi

Top 70%
×8stories
+106ft-24ft

Overall

19805

Females

7798

F18-39

7798

21M→35K

21.0 - 21.8 mi

Top 72%
×7stories
+17ft-86ft

Overall

20455

Females

8217

F18-39

8217

35K→23M

21.8 - 23.0 mi

Top 70%
×5stories
+23ft-63ft

Overall

19966

Females

8033

F18-39

8033

23M→24M

23.0 - 24.0 mi

Top 70%
×6stories
+12ft-82ft

Overall

19996

Females

8078

F18-39

8078

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

19012

Females

7637

F18-39

7637

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

17134

Females

6672

F18-39

6672

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2stories
+22ft-21ft

Overall

19048

Females

7627

F18-39

7627

Passing Analysis

Category:
Athletes Passed
1072
Passed By
3362
Net Change
-2290
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16848
5K → 10K164563-399#16848#17247
10K → 15K118387-269#17247#17516
15K → 20K97449-352#17516#17868
20K → Half1697-81#17868#17949
Half → 25K86381-295#17949#18244
25K → 30K121600-479#18244#18723
30K → 20M50259-209#18723#18932
20M → 21M78144-66#18932#18998
21M → 35K38121-83#18998#19081
35K → 23M64139-75#19081#19156
23M → 24M54106-52#19156#19208
24M → 40K7261+11#19208#19197
40K → 25.2M568+48#19197#19149
25.2M → Finish5847+11#19149#19138
TOTALS10723362-2290
📊

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