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BOSTON MARATHON 2025

Jennifer Lafleur

Bib: 19999•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 47%
Masters (Masters Women)
#0 / 6759
Top 35%
Division (F45-49)
#0 / 1813
Top 43%
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
8:29/mi
26:20
↑ 97↓ 3451.5%
10K· 6.21 mi
8:18/mi
52:08
↑ 79↓ 1380.4%
15K· 9.32 mi
8:16/mi
1:17:48
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:43:33
↑ 106↓ 860.1%
Half· 13.11 mi
8:08/mi
1:49:06
↑ 19↓ 370.5%
25K· 15.53 mi
8:35/mi
2:09:54
↑ 66↓ 880.2%
30K· 18.64 mi
8:39/mi
2:36:46
↑ 181↓ 1480.2%
20M
8:52/mi
2:48:49
↑ 64↓ 500.2%
21M
9:12/mi
2:58:01
↑ 106↓ 241.6%
35K· 21.75 mi
8:25/mi
3:04:19
↑ 17↓ 861.7%
23M
8:36/mi
3:15:05
↑ 23↓ 630.6%
24M
8:34/mi
3:23:39
↓ 821.3%
40K· 24.85 mi
8:36/mi
3:31:00
↓ 200.3%
25.2M
9:20/mi
3:34:13
↑ 13↓ 160.2%
Finish· 26.22 mi
8:26/mi
3:42:49
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:06
Pace8:19 /mi
2nd Half
Distance13.11 mi
Time1:53:43
Pace8:40 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:2626:208:2926:20
8:29
-
10K
6.21 mi11:49:1452:088:2325:48
8:18
-0:11
15K
9.32 mi12:14:541:17:488:2125:40
8:16
-0:02
20K
12.43 mi12:40:391:43:338:2025:45
8:17
+0:01
Half
13.11 mi12:46:121:49:068:195:33
8:08
-0:09
25K
15.53 mi13:07:002:09:548:2220:48
8:35
+0:27
30K
18.64 mi13:33:522:36:468:2526:52
8:39
+0:04
20M
20.00 mi13:45:552:48:498:2612:03
8:52
+0:13
21M
21.00 mi13:55:072:58:018:299:12
9:12
+0:20
35K
21.75 mi14:01:253:04:198:296:18
8:25
-0:47
23M
23.00 mi14:12:113:15:058:2910:46
8:36
+0:11
24M
24.00 mi14:20:453:23:398:298:34
8:34
-0:02
40K
24.85 mi14:28:063:31:008:297:21
8:36
+0:02
25.2M
25.20 mi14:31:193:34:138:303:13
9:20
+0:44
Finish
26.22 mi14:39:553:42:498:308:36
8:26
-0:54

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

8:08 /mi

Average Pace

8:30 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:30:24

94% of race

Time at Steady Pace

12:25

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:30 /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 mi11:23:2626:208:2926:20
8:29
#19758
10K
6.21 mi11:49:1452:088:2325:48
8:18
#19182
15K
9.32 mi12:14:541:17:488:2125:40
8:16
#18708
20K
12.43 mi12:40:391:43:338:2025:45
8:17
#18205
Half
13.11 mi12:46:121:49:068:195:33
8:08
#18114
25K
15.53 mi13:07:002:09:548:2220:48
8:35
#17999
30K
18.64 mi13:33:522:36:468:2526:52
8:39
#17539
20M
20.00 mi13:45:552:48:498:2612:03
8:52
#17399
21M
21.00 mi13:55:072:58:018:299:12
9:12
#17213
35K
21.75 mi14:01:253:04:198:296:18
8:25
#17113
23M
23.00 mi14:12:113:15:058:2910:46
8:36
#16894
24M
24.00 mi14:20:453:23:398:298:34
8:34
#16799
40K
24.85 mi14:28:063:31:008:297:21
8:36
#16668
25.2M
25.20 mi14:31:193:34:138:303:13
9:20
#16627
Finish
26.22 mi14:39:553:42:498:308:36
8:26
#16577
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi197587363736317808(Top 63%)6209(Top 51%)6209(Top 342%)
10K6.21 mi3.10 mi19182+5767001+3627001+36218586(Top 65%)6643(Top 54%)6643(Top 366%)
15K9.32 mi3.11 mi18708+4746735+2666735+26617808(Top 63%)6209(Top 51%)6209(Top 342%)
20K12.43 mi3.11 mi18205+5036462+2736462+27316875(Top 59%)5707(Top 47%)5707(Top 315%)
Half13.11 mi0.68 mi18114+916407+556407+5516912(Top 60%)5715(Top 47%)5715(Top 315%)
25K15.53 mi2.42 mi17999+1156359+486359+4817682(Top 62%)6238(Top 51%)6238(Top 344%)
30K18.64 mi3.11 mi17539+4606146+2136146+21315700(Top 55%)5286(Top 43%)5286(Top 292%)
20M20.00 mi1.36 mi17399+1406081+656081+6516058(Top 57%)5626(Top 46%)5626(Top 310%)
21M21.00 mi1.00 mi17213+1866001+806001+8014662(Top 52%)4980(Top 41%)4980(Top 275%)
35K21.75 mi0.75 mi17113+1005973+285973+2815044(Top 53%)5261(Top 43%)5261(Top 290%)
23M23.00 mi1.25 mi16894+2195875+985875+9813956(Top 49%)4786(Top 39%)4786(Top 264%)
24M24.00 mi1.00 mi16799+955840+355840+3514971(Top 53%)5366(Top 44%)5366(Top 296%)
40K24.85 mi0.85 mi16668+1315794+465794+4614077(Top 50%)5014(Top 41%)5014(Top 277%)
25.2M25.20 mi0.35 mi16627+415778+165778+1613701(Top 48%)4881(Top 40%)4881(Top 269%)
Finish26.22 mi1.02 mi16577+505771+75771+715850(Top 56%)5939(Top 49%)5939(Top 328%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

17808

Females

6209

F45-49

6209

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

18586

Females

6643

F45-49

6643

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

17808

Females

6209

F45-49

6209

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16875

Females

5707

F45-49

5707

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

16912

Females

5715

F45-49

5715

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17682

Females

6238

F45-49

6238

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

15700

Females

5286

F45-49

5286

30K→20M

18.6 - 20.0 mi

Top 57%
×5story building
+64ft-50ft

Overall

16058

Females

5626

F45-49

5626

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

14662

Females

4980

F45-49

4980

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

15044

Females

5261

F45-49

5261

35K→23M

21.8 - 23.0 mi

Top 49%
×5story building
+23ft-63ft

Overall

13956

Females

4786

F45-49

4786

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14971

Females

5366

F45-49

5366

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

14077

Females

5014

F45-49

5014

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13701

Females

4881

F45-49

4881

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

15850

Females

5939

F45-49

5939

Passing Analysis

Category:
Athletes Passed
3681
Passed By
500
Net Change
+3181
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19758
5K → 10K65983+576#19758#19182
10K → 15K51036+474#19182#18708
15K → 20K52320+503#18708#18205
20K → Half954+91#18205#18114
Half → 25K222107+115#18114#17999
25K → 30K49939+460#17999#17539
30K → 20M17939+140#17539#17399
20M → 21M21327+186#17399#17213
21M → 35K11616+100#17213#17113
35K → 23M23516+219#17113#16894
23M → 24M12126+95#16894#16799
24M → 40K15120+131#16799#16668
40K → 25.2M5413+41#16668#16627
25.2M → Finish10454+50#16627#16577
TOTALS3681500+3181
📊

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