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BOSTON MARATHON 2025

Jennifer Jansonius

Bib: 8263•F

CO

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
31:30
Rank: #25920
Start → 5K
31:30 | 10:08/mi
10K· 6.21 mi
1:03:24
Rank: #25913 (+7)
5K → 10K
31:54 | 10:16/mi
15K· 9.32 mi
1:39:36
Rank: #26614 (-701)
10K → 15K
36:12 | 11:39/mi
20K· 12.43 mi
2:14:16
Rank: #26488 (+126)
15K → 20K
34:40 | 11:09/mi
Half· 13.11 mi
2:21:12
Rank: #26430 (+58)
20K → Half
6:56 | 10:10/mi
25K· 15.53 mi
2:47:13
Rank: #26144 (+286)
Half → 25K
26:01 | 10:44/mi
30K· 18.64 mi
3:26:17
Rank: #26182 (-38)
25K → 30K
39:04 | 12:34/mi
20M
3:43:42
Rank: #26191 (-9)
30K → 20M
17:25 | 12:49/mi
21M
3:59:58
Rank: #26377 (-186)
20M → 21M
16:16 | 16:16/mi
35K· 21.75 mi
4:08:36
Rank: #26332 (+45)
21M → 35K
8:38 | 11:32/mi
23M
4:22:24
Rank: #26202 (+130)
35K → 23M
13:48 | 11:01/mi
24M
4:33:54
Rank: #26161 (+41)
23M → 24M
11:30 | 11:30/mi
40K· 24.85 mi
4:42:56
Rank: #26070 (+91)
24M → 40K
9:02 | 10:34/mi
25.2M
4:47:18
Rank: #26059 (+11)
40K → 25.2M
4:22 | 12:40/mi
Finish· 26.22 mi
4:58:21
Rank: #26048 (+11)
25.2M → Finish
11:03 | 10:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:21:12
Pace10:46 /mi
2nd Half
Distance13.11 mi
Time2:37:09
Pace11:59 /mi
📊Positive Split: 11.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:41:2931:3010:0831:30
10:08
-
10K
6.21 mi11:13:231:03:2410:1231:54
10:16
+0:08
15K
9.32 mi11:49:351:39:3610:4136:12
11:39
+1:23
20K
12.43 mi12:24:152:14:1610:4834:40
11:09
-0:30
Half
13.11 mi12:31:112:21:1210:466:56
10:10
-0:59
25K
15.53 mi12:57:122:47:1310:4626:01
10:44
+0:34
30K
18.64 mi13:36:163:26:1711:0439:04
12:34
+1:50
20M
20.00 mi13:53:413:43:4211:1117:25
12:49
+0:15
21M
21.00 mi14:09:573:59:5811:2616:16
16:16
+3:27
35K
21.75 mi14:18:354:08:3611:268:38
11:32
-4:44
23M
23.00 mi14:32:234:22:2411:2513:48
11:01
-0:31
24M
24.00 mi14:43:534:33:5411:2511:30
11:30
+0:29
40K
24.85 mi14:52:554:42:5611:239:02
10:34
-0:56
25.2M
25.20 mi14:57:174:47:1811:244:22
12:40
+2:06
Finish
26.22 mi15:08:204:58:2111:2311:03
10:51
-1:49

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

10:08 /mi

Average Pace

11:23 /mi

Slowest Pace

16:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:10:20

24% of race

Time at Steady Pace

2:30:54

51% of race

Time at Slower Pace

1:17:07

26% of race

Average Pace: 11:23 /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 mi10:41:2931:3010:0831:30
10:08
#25920
10K
6.21 mi11:13:231:03:2410:1231:54
10:16
#25913
15K
9.32 mi11:49:351:39:3610:4136:12
11:39
#26614
20K
12.43 mi12:24:152:14:1610:4834:40
11:09
#26488
Half
13.11 mi12:31:112:21:1210:466:56
10:10
#26430
25K
15.53 mi12:57:122:47:1310:4626:01
10:44
#26144
30K
18.64 mi13:36:163:26:1711:0439:04
12:34
#26182
20M
20.00 mi13:53:413:43:4211:1117:25
12:49
#26191
21M
21.00 mi14:09:573:59:5811:2616:16
16:16
#26377
35K
21.75 mi14:18:354:08:3611:268:38
11:32
#26332
23M
23.00 mi14:32:234:22:2411:2513:48
11:01
#26202
24M
24.00 mi14:43:534:33:5411:2511:30
11:30
#26161
40K
24.85 mi14:52:554:42:5611:239:02
10:34
#26070
25.2M
25.20 mi14:57:174:47:1811:244:22
12:40
#26059
Finish
26.22 mi15:08:204:58:2111:2311:03
10:51
#26048
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi25920107191071927370(Top 96%)11604(Top 95%)11604(Top 675%)
10K6.21 mi3.10 mi25913+710723-410723-425853(Top 91%)10714(Top 88%)10714(Top 624%)
15K9.32 mi3.11 mi26614-70111120-39711120-39727370(Top 96%)11604(Top 95%)11604(Top 675%)
20K12.43 mi3.11 mi26488+12611061+5911061+5926235(Top 92%)10932(Top 89%)10932(Top 636%)
Half13.11 mi0.68 mi26430+5811022+3911022+3925158(Top 89%)10357(Top 85%)10357(Top 603%)
25K15.53 mi2.42 mi26144+28610868+15410868+15424763(Top 87%)10163(Top 83%)10163(Top 592%)
30K18.64 mi3.11 mi26182-3810923-5510923-5526248(Top 92%)11095(Top 91%)11095(Top 646%)
20M20.00 mi1.36 mi26191-910940-1710940-1726254(Top 92%)11141(Top 91%)11141(Top 648%)
21M21.00 mi1.00 mi26377-18611060-12011060-12027922(Top 98%)12017(Top 98%)12017(Top 699%)
35K21.75 mi0.75 mi26332+4511047+1311047+1325141(Top 89%)10663(Top 87%)10663(Top 621%)
23M23.00 mi1.25 mi26202+13010980+6710980+6723262(Top 82%)9746(Top 80%)9746(Top 567%)
24M24.00 mi1.00 mi26161+4110965+1510965+1524883(Top 88%)10576(Top 86%)10576(Top 616%)
40K24.85 mi0.85 mi26070+9110916+4910916+4922072(Top 78%)9244(Top 76%)9244(Top 538%)
25.2M25.20 mi0.35 mi26059+1110913+310913+324449(Top 86%)10407(Top 85%)10407(Top 606%)
Finish26.22 mi1.02 mi26048+1110916-310916-325030(Top 88%)10673(Top 87%)10673(Top 621%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 96%
×21stories
+97ft-345ft

Overall

27370

Females

11604

F40-44

11604

5K→10K

3.1 - 6.2 mi

Top 91%
×5stories
+79ft-138ft

Overall

25853

Females

10714

F40-44

10714

10K→15K

6.2 - 9.3 mi

Top 96%
×3stories
+67ft-78ft

Overall

27370

Females

11604

F40-44

11604

15K→20K

9.3 - 12.4 mi

Top 92%
×5stories
+106ft-86ft

Overall

26235

Females

10932

F40-44

10932

20K→Half

12.4 - 13.1 mi

Top 89%
×2stories
+19ft-37ft

Overall

25158

Females

10357

F40-44

10357

Half→25K

13.1 - 15.5 mi

Top 87%
×4stories
+66ft-88ft

Overall

24763

Females

10163

F40-44

10163

25K→30K

15.5 - 18.6 mi

Top 92%
×9stories
+181ft-148ft

Overall

26248

Females

11095

F40-44

11095

30K→20M

18.6 - 20.0 mi

Top 92%
×5stories
+64ft-50ft

Overall

26254

Females

11141

F40-44

11141

20M→21M

20.0 - 21.0 mi

Top 98%
×8stories
+106ft-24ft

Overall

27922

Females

12017

F40-44

12017

21M→35K

21.0 - 21.8 mi

Top 89%
×7stories
+17ft-86ft

Overall

25141

Females

10663

F40-44

10663

35K→23M

21.8 - 23.0 mi

Top 82%
×5stories
+23ft-63ft

Overall

23262

Females

9746

F40-44

9746

23M→24M

23.0 - 24.0 mi

Top 88%
×6stories
+12ft-82ft

Overall

24883

Females

10576

F40-44

10576

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

22072

Females

9244

F40-44

9244

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

24449

Females

10407

F40-44

10407

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2stories
+22ft-21ft

Overall

25030

Females

10673

F40-44

10673

Passing Analysis

Category:
Athletes Passed
1239
Passed By
1367
Net Change
-128
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25920
5K → 10K187180+7#25920#25913
10K → 15K18719-701#25913#26614
15K → 20K17751+126#26614#26488
20K → Half591+58#26488#26430
Half → 25K2926+286#26430#26144
25K → 30K87125-38#26144#26182
30K → 20M4655-9#26182#26191
20M → 21M8194-186#26191#26377
21M → 35K472+45#26377#26332
35K → 23M1311+130#26332#26202
23M → 24M509+41#26202#26161
24M → 40K921+91#26161#26070
40K → 25.2M176+11#26070#26059
25.2M → Finish2817+11#26059#26048
TOTALS12391367-128
📊

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