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BOSTON MARATHON 2025

Samantha Jackson

Bib: 28603•F

MD

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
34:05
Rank: #27532
Start → 5K
34:05 | 10:58/mi
10K· 6.21 mi
1:08:04
Rank: #27252 (+280)
5K → 10K
33:59 | 10:56/mi
15K· 9.32 mi
1:42:31
Rank: #27068 (+184)
10K → 15K
34:27 | 11:05/mi
20K· 12.43 mi
2:18:19
Rank: #26962 (+106)
15K → 20K
35:48 | 11:31/mi
Half· 13.11 mi
2:26:08
Rank: #26963 (-1)
20K → Half
7:49 | 11:27/mi
25K· 15.53 mi
2:54:07
Rank: #26784 (+179)
Half → 25K
27:59 | 11:32/mi
30K· 18.64 mi
3:30:00
Rank: #26486 (+298)
25K → 30K
35:53 | 11:33/mi
20M
3:46:03
Rank: #26381 (+105)
30K → 20M
16:03 | 11:49/mi
21M
3:58:05
Rank: #26256 (+125)
20M → 21M
12:02 | 12:02/mi
35K· 21.75 mi
4:05:54
Rank: #26165 (+91)
21M → 35K
7:49 | 10:27/mi
23M
4:19:41
Rank: #26039 (+126)
35K → 23M
13:47 | 11:01/mi
24M
4:30:20
Rank: #25954 (+85)
23M → 24M
10:39 | 10:39/mi
40K· 24.85 mi
4:39:37
Rank: #25878 (+76)
24M → 40K
9:17 | 10:51/mi
25.2M
4:43:45
Rank: #25851 (+27)
40K → 25.2M
4:08 | 11:59/mi
Finish· 26.22 mi
4:54:33
Rank: #25822 (+29)
25.2M → Finish
10:48 | 10:36/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:26:08
Pace11:09 /mi
2nd Half
Distance13.11 mi
Time2:28:25
Pace11:19 /mi
📊Positive Split: 1.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:0834:0510:5834:05
10:58
-
10K
6.21 mi12:25:071:08:0410:5733:59
10:56
-0:02
15K
9.32 mi12:59:341:42:3111:0034:27
11:05
+0:09
20K
12.43 mi13:35:222:18:1911:0835:48
11:31
+0:26
Half
13.11 mi13:43:112:26:0811:097:49
11:27
-0:04
25K
15.53 mi14:11:102:54:0711:1327:59
11:32
+0:05
30K
18.64 mi14:47:033:30:0011:1635:53
11:33
+0:01
20M
20.00 mi15:03:063:46:0311:1816:03
11:49
+0:16
21M
21.00 mi15:15:083:58:0511:2012:02
12:02
+0:13
35K
21.75 mi15:22:574:05:5411:187:49
10:27
-1:35
23M
23.00 mi15:36:444:19:4111:1713:47
11:01
+0:34
24M
24.00 mi15:47:234:30:2011:1610:39
10:39
-0:22
40K
24.85 mi15:56:404:39:3711:159:17
10:51
+0:12
25.2M
25.20 mi16:00:484:43:4511:164:08
11:59
+1:08
Finish
26.22 mi16:11:364:54:3311:1510:48
10:36
-1:23

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

10:27 /mi

Average Pace

11:15 /mi

Slowest Pace

12:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:40

55% of race

Time at Steady Pace

2:11:53

45% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 11:14 /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 mi11:51:0834:0510:5834:05
10:58
#27532
10K
6.21 mi12:25:071:08:0410:5733:59
10:56
#27252
15K
9.32 mi12:59:341:42:3111:0034:27
11:05
#27068
20K
12.43 mi13:35:222:18:1911:0835:48
11:31
#26962
Half
13.11 mi13:43:112:26:0811:097:49
11:27
#26963
25K
15.53 mi14:11:102:54:0711:1327:59
11:32
#26784
30K
18.64 mi14:47:033:30:0011:1635:53
11:33
#26486
20M
20.00 mi15:03:063:46:0311:1816:03
11:49
#26381
21M
21.00 mi15:15:083:58:0511:2012:02
12:02
#26256
35K
21.75 mi15:22:574:05:5411:187:49
10:27
#26165
23M
23.00 mi15:36:444:19:4111:1713:47
11:01
#26039
24M
24.00 mi15:47:234:30:2011:1610:39
10:39
#25954
40K
24.85 mi15:56:404:39:3711:159:17
10:51
#25878
25.2M
25.20 mi16:00:484:43:4511:164:08
11:59
#25851
Finish
26.22 mi16:11:364:54:3311:1510:48
10:36
#25822
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi27532116661166626778(Top 94%)11243(Top 92%)11243(Top 206%)
10K6.21 mi3.10 mi27252+28011506+16011506+16026980(Top 95%)11361(Top 93%)11361(Top 208%)
15K9.32 mi3.11 mi27068+18411401+10511401+10526778(Top 94%)11243(Top 92%)11243(Top 206%)
20K12.43 mi3.11 mi26962+10611346+5511346+5526647(Top 94%)11186(Top 91%)11186(Top 205%)
Half13.11 mi0.68 mi26963-111354-811354-827011(Top 95%)11424(Top 93%)11424(Top 209%)
25K15.53 mi2.42 mi26784+17911251+10311251+10325911(Top 91%)10813(Top 88%)10813(Top 198%)
30K18.64 mi3.11 mi26486+29811093+15811093+15824921(Top 88%)10360(Top 85%)10360(Top 189%)
20M20.00 mi1.36 mi26381+10511051+4211051+4224984(Top 88%)10464(Top 86%)10464(Top 191%)
21M21.00 mi1.00 mi26256+12510995+5610995+5623639(Top 83%)9838(Top 80%)9838(Top 180%)
35K21.75 mi0.75 mi26165+9110946+4910946+4923029(Top 81%)9576(Top 78%)9576(Top 175%)
23M23.00 mi1.25 mi26039+12610882+6410882+6423229(Top 82%)9728(Top 80%)9728(Top 178%)
24M24.00 mi1.00 mi25954+8510843+3910843+3923177(Top 82%)9731(Top 80%)9731(Top 178%)
40K24.85 mi0.85 mi25878+7610815+2810815+2822792(Top 80%)9603(Top 79%)9603(Top 176%)
25.2M25.20 mi0.35 mi25851+2710809+610809+623148(Top 81%)9746(Top 80%)9746(Top 178%)
Finish26.22 mi1.02 mi25822+2910807+210807+224480(Top 86%)10396(Top 85%)10396(Top 190%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21stories
+97ft-345ft

Overall

26778

Females

11243

F18-39

11243

5K→10K

3.1 - 6.2 mi

Top 95%
×5stories
+79ft-138ft

Overall

26980

Females

11361

F18-39

11361

10K→15K

6.2 - 9.3 mi

Top 94%
×3stories
+67ft-78ft

Overall

26778

Females

11243

F18-39

11243

15K→20K

9.3 - 12.4 mi

Top 94%
×5stories
+106ft-86ft

Overall

26647

Females

11186

F18-39

11186

20K→Half

12.4 - 13.1 mi

Top 95%
×2stories
+19ft-37ft

Overall

27011

Females

11424

F18-39

11424

Half→25K

13.1 - 15.5 mi

Top 91%
×4stories
+66ft-88ft

Overall

25911

Females

10813

F18-39

10813

25K→30K

15.5 - 18.6 mi

Top 88%
×9stories
+181ft-148ft

Overall

24921

Females

10360

F18-39

10360

30K→20M

18.6 - 20.0 mi

Top 88%
×5stories
+64ft-50ft

Overall

24984

Females

10464

F18-39

10464

20M→21M

20.0 - 21.0 mi

Top 83%
×8stories
+106ft-24ft

Overall

23639

Females

9838

F18-39

9838

21M→35K

21.0 - 21.8 mi

Top 81%
×7stories
+17ft-86ft

Overall

23029

Females

9576

F18-39

9576

35K→23M

21.8 - 23.0 mi

Top 82%
×5stories
+23ft-63ft

Overall

23229

Females

9728

F18-39

9728

23M→24M

23.0 - 24.0 mi

Top 82%
×6stories
+12ft-82ft

Overall

23177

Females

9731

F18-39

9731

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22792

Females

9603

F18-39

9603

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

23148

Females

9746

F18-39

9746

25.2M→Finish

25.2 - 26.2 mi

Top 86%
×2stories
+22ft-21ft

Overall

24480

Females

10396

F18-39

10396

Passing Analysis

Category:
Athletes Passed
1868
Passed By
158
Net Change
+1710
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27532
5K → 10K29616+280#27532#27252
10K → 15K21228+184#27252#27068
15K → 20K15549+106#27068#26962
20K → Half2223-1#26962#26963
Half → 25K1856+179#26963#26784
25K → 30K3024+298#26784#26486
30K → 20M1105+105#26486#26381
20M → 21M1327+125#26381#26256
21M → 35K921+91#26256#26165
35K → 23M1293+126#26165#26039
23M → 24M883+85#26039#25954
24M → 40K760+76#25954#25878
40K → 25.2M314+27#25878#25851
25.2M → Finish389+29#25851#25822
TOTALS1868158+1710
📊

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