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BOSTON MARATHON 2025

Karen Sinclair

Bib: 23075•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 45%
Division (F50-54)
#0 / 1303
Top 42%
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
8:27/mi
26:15
↑ 97↓ 3451.5%
10K· 6.21 mi
8:28/mi
52:32
↑ 79↓ 1380.4%
15K· 9.32 mi
8:26/mi
1:18:43
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:45:07
↑ 106↓ 860.1%
Half· 13.11 mi
8:34/mi
1:50:58
↑ 19↓ 370.5%
25K· 15.53 mi
8:40/mi
2:11:58
↑ 66↓ 880.2%
30K· 18.64 mi
9:14/mi
2:40:38
↑ 181↓ 1480.2%
20M
9:21/mi
2:53:20
↑ 64↓ 500.2%
21M
10:21/mi
3:03:41
↑ 106↓ 241.6%
35K· 21.75 mi
8:27/mi
3:10:00
↑ 17↓ 861.7%
23M
8:50/mi
3:21:04
↑ 23↓ 630.6%
24M
8:36/mi
3:29:40
↓ 821.3%
40K· 24.85 mi
8:42/mi
3:37:06
↓ 200.3%
25.2M
9:17/mi
3:40:18
↑ 13↓ 160.2%
Finish· 26.22 mi
8:58/mi
3:49:26
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:58
Pace8:28 /mi
2nd Half
Distance13.11 mi
Time1:58:28
Pace9:02 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:4526:158:2726:15
8:27
-
10K
6.21 mi11:49:0252:328:2726:17
8:28
+0:01
15K
9.32 mi12:15:131:18:438:2726:11
8:26
-0:02
20K
12.43 mi12:41:371:45:078:2826:24
8:30
+0:04
Half
13.11 mi12:47:281:50:588:285:51
8:34
+0:04
25K
15.53 mi13:08:282:11:588:3021:00
8:40
+0:06
30K
18.64 mi13:37:082:40:388:3728:40
9:14
+0:34
20M
20.00 mi13:49:502:53:208:4012:42
9:21
+0:07
21M
21.00 mi14:00:113:03:418:4510:21
10:21
+1:00
35K
21.75 mi14:06:303:10:008:446:19
8:27
-1:54
23M
23.00 mi14:17:343:21:048:4511:04
8:50
+0:23
24M
24.00 mi14:26:103:29:408:448:36
8:36
-0:14
40K
24.85 mi14:33:363:37:068:447:26
8:42
+0:06
25.2M
25.20 mi14:36:483:40:188:453:12
9:17
+0:35
Finish
26.22 mi14:45:563:49:268:459:08
8:58
-0:19

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

8:26 /mi

Average Pace

8:45 /mi

Slowest Pace

10:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:45:23

72% of race

Time at Slower Pace

1:04:03

28% of race

Average Pace: 8:45 /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 mi11:22:4526:158:2726:15
8:27
#19598
10K
6.21 mi11:49:0252:328:2726:17
8:28
#19558
15K
9.32 mi12:15:131:18:438:2726:11
8:26
#19334
20K
12.43 mi12:41:371:45:078:2826:24
8:30
#19004
Half
13.11 mi12:47:281:50:588:285:51
8:34
#19030
25K
15.53 mi13:08:282:11:588:3021:00
8:40
#18869
30K
18.64 mi13:37:082:40:388:3728:40
9:14
#18856
20M
20.00 mi13:49:502:53:208:4012:42
9:21
#18833
21M
21.00 mi14:00:113:03:418:4510:21
10:21
#18885
35K
21.75 mi14:06:303:10:008:446:19
8:27
#18743
23M
23.00 mi14:17:343:21:048:4511:04
8:50
#18536
24M
24.00 mi14:26:103:29:408:448:36
8:36
#18369
40K
24.85 mi14:33:363:37:068:447:26
8:42
#18219
25.2M
25.20 mi14:36:483:40:188:453:12
9:17
#18153
Finish
26.22 mi14:45:563:49:268:459:08
8:58
#18193
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi195987256725618878(Top 66%)6828(Top 56%)6828(Top 524%)
10K6.21 mi3.10 mi19558+407214+427214+4219574(Top 69%)7216(Top 59%)7216(Top 554%)
15K9.32 mi3.11 mi19334+2247081+1337081+13318878(Top 66%)6828(Top 56%)6828(Top 524%)
20K12.43 mi3.11 mi19004+3306908+1736908+17318236(Top 64%)6471(Top 53%)6471(Top 497%)
Half13.11 mi0.68 mi19030-266922-146922-1419698(Top 69%)7286(Top 60%)7286(Top 559%)
25K15.53 mi2.42 mi18869+1616839+836839+8318165(Top 64%)6516(Top 53%)6516(Top 500%)
30K18.64 mi3.11 mi18856+136861-226861-2218766(Top 66%)6991(Top 57%)6991(Top 537%)
20M20.00 mi1.36 mi18833+236873-126873-1218517(Top 65%)7010(Top 57%)7010(Top 538%)
21M21.00 mi1.00 mi18885-526940-676940-6719544(Top 69%)7645(Top 63%)7645(Top 587%)
35K21.75 mi0.75 mi18743+1426874+666874+6615185(Top 53%)5347(Top 44%)5347(Top 410%)
23M23.00 mi1.25 mi18536+2076787+876787+8715356(Top 54%)5530(Top 45%)5530(Top 424%)
24M24.00 mi1.00 mi18369+1676719+686719+6815204(Top 54%)5502(Top 45%)5502(Top 422%)
40K24.85 mi0.85 mi18219+1506666+536666+5314638(Top 52%)5337(Top 44%)5337(Top 410%)
25.2M25.20 mi0.35 mi18153+666642+246642+2413465(Top 47%)4774(Top 39%)4774(Top 366%)
Finish26.22 mi1.02 mi18193-406676-346676-3418860(Top 66%)7520(Top 61%)7520(Top 577%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21story building
+97ft-345ft

Overall

18878

Females

6828

F50-54

6828

5K→10K

3.1 - 6.2 mi

Top 69%
×5story building
+79ft-138ft

Overall

19574

Females

7216

F50-54

7216

10K→15K

6.2 - 9.3 mi

Top 66%
×3story building
+67ft-78ft

Overall

18878

Females

6828

F50-54

6828

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

18236

Females

6471

F50-54

6471

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

19698

Females

7286

F50-54

7286

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

18165

Females

6516

F50-54

6516

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

18766

Females

6991

F50-54

6991

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

18517

Females

7010

F50-54

7010

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

19544

Females

7645

F50-54

7645

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

15185

Females

5347

F50-54

5347

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

15356

Females

5530

F50-54

5530

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15204

Females

5502

F50-54

5502

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

14638

Females

5337

F50-54

5337

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13465

Females

4774

F50-54

4774

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

18860

Females

7520

F50-54

7520

Passing Analysis

Category:
Athletes Passed
2507
Passed By
1102
Net Change
+1405
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19598
5K → 10K274234+40#19598#19558
10K → 15K31793+224#19558#19334
15K → 20K38353+330#19334#19004
20K → Half2248-26#19004#19030
Half → 25K23069+161#19030#18869
25K → 30K252239+13#18869#18856
30K → 20M11390+23#18856#18833
20M → 21M93145-52#18833#18885
21M → 35K1464+142#18885#18743
35K → 23M22316+207#18743#18536
23M → 24M1747+167#18536#18369
24M → 40K16010+150#18369#18219
40K → 25.2M704+66#18219#18153
25.2M → Finish5090-40#18153#18193
TOTALS25071102+1405
📊

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