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BOSTON MARATHON 2025

Alyson Rembowicz

Bib: 12386•F

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 31%
Gender (Female)
#0 / 12228
Top 14%
Masters (Masters Women)
#0 / 6759
Top 5%
Division (F40-44)
#0 / 1718
Top 11%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:46
Rank: #10653
Start → 5K
22:46 | 7:20/mi
10K· 6.21 mi
45:20
Rank: #10312 (+341)
5K → 10K
22:34 | 7:16/mi
15K· 9.32 mi
1:07:50
Rank: #10023 (+289)
10K → 15K
22:30 | 7:15/mi
20K· 12.43 mi
1:30:21
Rank: #9604 (+419)
15K → 20K
22:31 | 7:15/mi
Half· 13.11 mi
1:35:17
Rank: #9586 (+18)
20K → Half
4:56 | 7:14/mi
25K· 15.53 mi
1:53:05
Rank: #9400 (+186)
Half → 25K
17:48 | 7:20/mi
30K· 18.64 mi
2:16:37
Rank: #9091 (+309)
25K → 30K
23:32 | 7:34/mi
20M
2:27:13
Rank: #9070 (+21)
30K → 20M
10:36 | 7:48/mi
21M
2:35:09
Rank: #8875 (+195)
20M → 21M
7:56 | 7:56/mi
35K· 21.75 mi
2:41:05
Rank: #8976 (-101)
21M → 35K
5:56 | 7:56/mi
23M
2:51:04
Rank: #8967 (+9)
35K → 23M
9:59 | 7:58/mi
24M
2:59:02
Rank: #9032 (-65)
23M → 24M
7:58 | 7:58/mi
40K· 24.85 mi
3:05:45
Rank: #9008 (+24)
24M → 40K
6:43 | 7:51/mi
25.2M
3:08:39
Rank: #8981 (+27)
40K → 25.2M
2:54 | 8:25/mi
Finish· 26.22 mi
3:16:06
Rank: #8894 (+87)
25.2M → Finish
7:27 | 7:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:17
Pace7:16 /mi
2nd Half
Distance13.11 mi
Time1:40:49
Pace7:41 /mi
📊Positive Split: 5.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:2522:467:2022:46
7:20
-
10K
6.21 mi11:12:5945:207:1822:34
7:16
-0:04
15K
9.32 mi11:35:291:07:507:1722:30
7:15
-0:01
20K
12.43 mi11:58:001:30:217:1622:31
7:15
0:00
Half
13.11 mi12:02:561:35:177:164:56
7:14
-0:01
25K
15.53 mi12:20:441:53:057:1717:48
7:20
+0:06
30K
18.64 mi12:44:162:16:377:2023:32
7:34
+0:14
20M
20.00 mi12:54:522:27:137:2210:36
7:48
+0:14
21M
21.00 mi13:02:482:35:097:237:56
7:56
+0:08
35K
21.75 mi13:08:442:41:057:245:56
7:56
0:00
23M
23.00 mi13:18:432:51:047:269:59
7:58
+0:02
24M
24.00 mi13:26:412:59:027:287:58
7:58
0:00
40K
24.85 mi13:33:243:05:457:286:43
7:51
-0:07
25.2M
25.20 mi13:36:183:08:397:292:54
8:25
+0:34
Finish
26.22 mi13:43:453:16:067:297:27
7:19
-1:06

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

7:14 /mi

Average Pace

7:29 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:15

89% of race

Time at Steady Pace

20:51

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:29 /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 mi10:50:2522:467:2022:46
7:20
#10653
10K
6.21 mi11:12:5945:207:1822:34
7:16
#10312
15K
9.32 mi11:35:291:07:507:1722:30
7:15
#10023
20K
12.43 mi11:58:001:30:217:1622:31
7:15
#9604
Half
13.11 mi12:02:561:35:177:164:56
7:14
#9586
25K
15.53 mi12:20:441:53:057:1717:48
7:20
#9400
30K
18.64 mi12:44:162:16:377:2023:32
7:34
#9091
20M
20.00 mi12:54:522:27:137:2210:36
7:48
#9070
21M
21.00 mi13:02:482:35:097:237:56
7:56
#8875
35K
21.75 mi13:08:442:41:057:245:56
7:56
#8976
23M
23.00 mi13:18:432:51:047:269:59
7:58
#8967
24M
24.00 mi13:26:412:59:027:287:58
7:58
#9032
40K
24.85 mi13:33:243:05:457:286:43
7:51
#9008
25.2M
25.20 mi13:36:183:08:397:292:54
8:25
#8981
Finish
26.22 mi13:43:453:16:067:297:27
7:19
#8894
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi10653211021109498(Top 33%)1650(Top 13%)1650(Top 96%)
10K6.21 mi3.10 mi10312+3411960+1501960+15010050(Top 35%)1851(Top 15%)1851(Top 108%)
15K9.32 mi3.11 mi10023+2891851+1091851+1099498(Top 33%)1650(Top 13%)1650(Top 96%)
20K12.43 mi3.11 mi9604+4191690+1611690+1618620(Top 30%)1364(Top 11%)1364(Top 79%)
Half13.11 mi0.68 mi9586+181691-11691-19445(Top 33%)1688(Top 14%)1688(Top 98%)
25K15.53 mi2.42 mi9400+1861629+621629+628693(Top 31%)1499(Top 12%)1499(Top 87%)
30K18.64 mi3.11 mi9091+3091546+831546+838269(Top 29%)1497(Top 12%)1497(Top 87%)
20M20.00 mi1.36 mi9070+211570-241570-249040(Top 32%)1995(Top 16%)1995(Top 116%)
21M21.00 mi1.00 mi8875+1951521+491521+496932(Top 24%)1290(Top 11%)1290(Top 75%)
35K21.75 mi0.75 mi8976-1011586-651586-6511856(Top 42%)3595(Top 29%)3595(Top 209%)
23M23.00 mi1.25 mi8967+91630-441630-449854(Top 35%)2658(Top 22%)2658(Top 155%)
24M24.00 mi1.00 mi9032-651683-531683-5311010(Top 39%)3300(Top 27%)3300(Top 192%)
40K24.85 mi0.85 mi9008+241713-301713-309196(Top 32%)2540(Top 21%)2540(Top 148%)
25.2M25.20 mi0.35 mi8981+271717-41717-48301(Top 29%)2181(Top 18%)2181(Top 127%)
Finish26.22 mi1.02 mi8894+871721-41721-47872(Top 28%)2013(Top 16%)2013(Top 117%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21stories
+97ft-345ft

Overall

9498

Females

1650

F40-44

1650

5K→10K

3.1 - 6.2 mi

Top 35%
×5stories
+79ft-138ft

Overall

10050

Females

1851

F40-44

1851

10K→15K

6.2 - 9.3 mi

Top 33%
×3stories
+67ft-78ft

Overall

9498

Females

1650

F40-44

1650

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8620

Females

1364

F40-44

1364

20K→Half

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

9445

Females

1688

F40-44

1688

Half→25K

13.1 - 15.5 mi

Top 31%
×4stories
+66ft-88ft

Overall

8693

Females

1499

F40-44

1499

25K→30K

15.5 - 18.6 mi

Top 29%
×9stories
+181ft-148ft

Overall

8269

Females

1497

F40-44

1497

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

9040

Females

1995

F40-44

1995

20M→21M

20.0 - 21.0 mi

Top 24%
×8stories
+106ft-24ft

Overall

6932

Females

1290

F40-44

1290

21M→35K

21.0 - 21.8 mi

Top 42%
×7stories
+17ft-86ft

Overall

11856

Females

3595

F40-44

3595

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

9854

Females

2658

F40-44

2658

23M→24M

23.0 - 24.0 mi

Top 39%
×6stories
+12ft-82ft

Overall

11010

Females

3300

F40-44

3300

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

9196

Females

2540

F40-44

2540

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

8301

Females

2181

F40-44

2181

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2stories
+22ft-21ft

Overall

7872

Females

2013

F40-44

2013

Passing Analysis

Category:
Athletes Passed
2701*
Passed By
942
Net Change
+1759
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10653
5K → 10K461120+341#10653#10312
10K → 15K34354+289#10312#10023
15K → 20K436*17+419#10023#9604
20K → Half3820+18#9604#9586
Half → 25K23953+186#9586#9400
25K → 30K37566+309#9400#9091
30K → 20M11998+21#9091#9070
20M → 21M21419+195#9070#8875
21M → 35K44145-101#8875#8976
35K → 23M112103+9#8976#8967
23M → 24M53118-65#8967#9032
24M → 40K9773+24#9032#9008
40K → 25.2M4821+27#9008#8981
25.2M → Finish12235+87#8981#8894
TOTALS2701*942+1759

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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