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BOSTON MARATHON 2025

Alison Wierenga

Bib: 14378•F

TN

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 39%
Gender (Female)
#0 / 12228
Top 23%
Masters (Masters Women)
#0 / 6759
Top 10%
Division (F45-49)
#0 / 1813
Top 12%
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
7:01/mi
21:48
↑ 97↓ 3451.5%
10K· 6.21 mi
7:01/mi
43:37
↑ 79↓ 1380.4%
15K· 9.32 mi
7:03/mi
1:05:32
↑ 67↓ 78
20K· 12.43 mi
7:15/mi
1:28:04
↑ 106↓ 860.1%
Half· 13.11 mi
7:04/mi
1:32:53
↑ 19↓ 370.5%
25K· 15.53 mi
7:39/mi
1:51:27
↑ 66↓ 880.2%
30K· 18.64 mi
7:59/mi
2:16:16
↑ 181↓ 1480.2%
20M
8:23/mi
2:27:40
↑ 64↓ 500.2%
21M
8:31/mi
2:36:11
↑ 106↓ 241.6%
35K· 21.75 mi
9:27/mi
2:43:15
↑ 17↓ 861.7%
23M
8:21/mi
2:53:42
↑ 23↓ 630.6%
24M
7:58/mi
3:01:40
↓ 821.3%
40K· 24.85 mi
9:53/mi
3:10:07
↓ 200.3%
25.2M
14:50/mi
3:15:14
↑ 13↓ 160.2%
Finish· 26.22 mi
8:15/mi
3:23:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:53
Pace7:05 /mi
2nd Half
Distance13.11 mi
Time1:50:45
Pace8:27 /mi
📊Positive Split: 19.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4421:487:0121:48
7:01
-
10K
6.21 mi11:13:3343:377:0121:49
7:01
0:00
15K
9.32 mi11:35:281:05:327:0221:55
7:03
+0:02
20K
12.43 mi11:58:001:28:047:0522:32
7:15
+0:12
Half
13.11 mi12:02:491:32:537:054:49
7:04
-0:11
25K
15.53 mi12:21:231:51:277:1018:34
7:39
+0:35
30K
18.64 mi12:46:122:16:167:1924:49
7:59
+0:20
20M
20.00 mi12:57:362:27:407:2311:24
8:23
+0:24
21M
21.00 mi13:06:072:36:117:268:31
8:31
+0:08
35K
21.75 mi13:13:112:43:157:307:04
9:27
+0:56
23M
23.00 mi13:23:382:53:427:3310:27
8:21
-1:06
24M
24.00 mi13:31:363:01:407:347:58
7:58
-0:23
40K
24.85 mi13:40:033:10:077:398:27
9:53
+1:55
25.2M
25.20 mi13:45:103:15:147:455:07
14:50
+4:57
Finish
26.22 mi13:53:343:23:387:468:24
8:15
-6:35

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

7:01 /mi

Average Pace

7:46 /mi

Slowest Pace

14:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

43:37

21% of race

Time at Steady Pace

2:19:23

68% of race

Time at Slower Pace

20:38

10% of race

Average Pace: 7:46 /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 mi10:51:4421:487:0121:48
7:01
#7974
10K
6.21 mi11:13:3343:377:0121:49
7:01
#8016
15K
9.32 mi11:35:281:05:327:0221:55
7:03
#7985
20K
12.43 mi11:58:001:28:047:0522:32
7:15
#8078
Half
13.11 mi12:02:491:32:537:054:49
7:04
#8067
25K
15.53 mi12:21:231:51:277:1018:34
7:39
#8469
30K
18.64 mi12:46:122:16:167:1924:49
7:59
#8936
20M
20.00 mi12:57:362:27:407:2311:24
8:23
#9264
21M
21.00 mi13:06:072:36:117:268:31
8:31
#9290
35K
21.75 mi13:13:112:43:157:307:04
9:27
#9806
23M
23.00 mi13:23:382:53:427:3310:27
8:21
#9954
24M
24.00 mi13:31:363:01:407:347:58
7:58
#9980
40K
24.85 mi13:40:033:10:077:398:27
9:53
#10482
25.2M
25.20 mi13:45:103:15:147:455:07
14:50
#11105
Finish
26.22 mi13:53:343:23:387:468:24
8:15
#11217
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi79749759758011(Top 28%)1048(Top 9%)1048(Top 58%)
10K6.21 mi3.10 mi8016-421002-271002-278102(Top 29%)1053(Top 9%)1053(Top 58%)
15K9.32 mi3.11 mi7985+31996+6996+68011(Top 28%)1048(Top 9%)1048(Top 58%)
20K12.43 mi3.11 mi8078-931053-571053-578668(Top 31%)1386(Top 11%)1386(Top 76%)
Half13.11 mi0.68 mi8067+11105310538094(Top 28%)1138(Top 9%)1138(Top 63%)
25K15.53 mi2.42 mi8469-4021230-1771230-17711227(Top 40%)2703(Top 22%)2703(Top 149%)
30K18.64 mi3.11 mi8936-4671488-2581488-25811297(Top 40%)2929(Top 24%)2929(Top 162%)
20M20.00 mi1.36 mi9264-3281656-1681656-16813082(Top 46%)4017(Top 33%)4017(Top 222%)
21M21.00 mi1.00 mi9290-261710-541710-5410598(Top 37%)2901(Top 24%)2901(Top 160%)
35K21.75 mi0.75 mi9806-5161961-2511961-25120144(Top 71%)8047(Top 66%)8047(Top 444%)
23M23.00 mi1.25 mi9954-1482090-1292090-12912327(Top 43%)3910(Top 32%)3910(Top 216%)
24M24.00 mi1.00 mi9980-262136-462136-4611022(Top 39%)3312(Top 27%)3312(Top 183%)
40K24.85 mi0.85 mi10482-5022404-2682404-26820075(Top 71%)8193(Top 67%)8193(Top 452%)
25.2M25.20 mi0.35 mi11105-6232764-3602764-36027020(Top 95%)11669(Top 95%)11669(Top 644%)
Finish26.22 mi1.02 mi11217-1122866-1022866-10214561(Top 51%)5229(Top 43%)5229(Top 288%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21story building
+97ft-345ft

Overall

8011

Females

1048

F45-49

1048

5K→10K

3.1 - 6.2 mi

Top 29%
×5story building
+79ft-138ft

Overall

8102

Females

1053

F45-49

1053

10K→15K

6.2 - 9.3 mi

Top 28%
×3story building
+67ft-78ft

Overall

8011

Females

1048

F45-49

1048

15K→20K

9.3 - 12.4 mi

Top 31%
×5story building
+106ft-86ft

Overall

8668

Females

1386

F45-49

1386

20K→Half

12.4 - 13.1 mi

Top 28%
×2story building
+19ft-37ft

Overall

8094

Females

1138

F45-49

1138

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

11227

Females

2703

F45-49

2703

25K→30K

15.5 - 18.6 mi

Top 40%
×9story building
+181ft-148ft

Overall

11297

Females

2929

F45-49

2929

30K→20M

18.6 - 20.0 mi

Top 46%
×5story building
+64ft-50ft

Overall

13082

Females

4017

F45-49

4017

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

10598

Females

2901

F45-49

2901

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

20144

Females

8047

F45-49

8047

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

12327

Females

3910

F45-49

3910

23M→24M

23.0 - 24.0 mi

Top 39%
×6story building
+12ft-82ft

Overall

11022

Females

3312

F45-49

3312

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

20075

Females

8193

F45-49

8193

40K→25.2M

24.9 - 25.2 mi

Top 95%
×1story
+13ft-16ft

Overall

27020

Females

11669

F45-49

11669

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

14561

Females

5229

F45-49

5229

Passing Analysis

Category:
Athletes Passed
972
Passed By
4211
Net Change
-3243
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7974
5K → 10K193235-42#7974#8016
10K → 15K156125+31#8016#7985
15K → 20K110203-93#7985#8078
20K → Half3221+11#8078#8067
Half → 25K44446-402#8067#8469
25K → 30K104571-467#8469#8936
30K → 20M38366-328#8936#9264
20M → 21M84110-26#9264#9290
21M → 35K10526-516#9290#9806
35K → 23M69216-148#9806#9954
23M → 24M7499-26#9954#9980
24M → 40K12512-502#9980#10482
40K → 25.2M1624-623#10482#11105
25.2M → Finish45157-112#11105#11217
TOTALS9724211-3243
📊

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