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BOSTON MARATHON 2025

Anna Smialek

Bib: 8408•F

FL

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 44%
Gender (Female)
#0 / 12228
Top 28%
Division (F18-39)
#0 / 5469
Top 47%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:31
Rank: #15599
Start → 5K
24:31 | 7:53/mi
10K· 6.21 mi
49:04
Rank: #15641 (-42)
5K → 10K
24:33 | 7:54/mi
15K· 9.32 mi
1:13:12
Rank: #15119 (+522)
10K → 15K
24:08 | 7:46/mi
20K· 12.43 mi
1:37:14
Rank: #14447 (+672)
15K → 20K
24:02 | 7:44/mi
Half· 13.11 mi
1:42:29
Rank: #14384 (+63)
20K → Half
5:15 | 7:42/mi
25K· 15.53 mi
2:01:18
Rank: #13958 (+426)
Half → 25K
18:49 | 7:46/mi
30K· 18.64 mi
2:26:00
Rank: #13356 (+602)
25K → 30K
24:42 | 7:57/mi
20M
2:36:53
Rank: #13078 (+278)
30K → 20M
10:53 | 8:01/mi
21M
2:45:15
Rank: #12865 (+213)
20M → 21M
8:22 | 8:22/mi
35K· 21.75 mi
2:51:03
Rank: #12765 (+100)
21M → 35K
5:48 | 7:45/mi
23M
3:01:15
Rank: #12614 (+151)
35K → 23M
10:12 | 8:09/mi
24M
3:09:22
Rank: #12563 (+51)
23M → 24M
8:07 | 8:07/mi
40K· 24.85 mi
3:16:25
Rank: #12500 (+63)
24M → 40K
7:03 | 8:15/mi
25.2M
3:19:28
Rank: #12468 (+32)
40K → 25.2M
3:03 | 8:51/mi
Finish· 26.22 mi
3:27:28
Rank: #12439 (+29)
25.2M → Finish
8:00 | 7:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:29
Pace7:49 /mi
2nd Half
Distance13.11 mi
Time1:44:59
Pace8:01 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:32:3824:317:5324:31
7:53
-
10K
6.21 mi10:57:1149:047:5424:33
7:54
+0:01
15K
9.32 mi11:21:191:13:127:5124:08
7:46
-0:08
20K
12.43 mi11:45:211:37:147:4924:02
7:44
-0:02
Half
13.11 mi11:50:361:42:297:495:15
7:42
-0:02
25K
15.53 mi12:09:252:01:187:4918:49
7:46
+0:04
30K
18.64 mi12:34:072:26:007:5024:42
7:57
+0:11
20M
20.00 mi12:45:002:36:537:5110:53
8:01
+0:04
21M
21.00 mi12:53:222:45:157:528:22
8:22
+0:21
35K
21.75 mi12:59:102:51:037:525:48
7:45
-0:37
23M
23.00 mi13:09:223:01:157:5310:12
8:09
+0:24
24M
24.00 mi13:17:293:09:227:538:07
8:07
-0:02
40K
24.85 mi13:24:323:16:257:547:03
8:15
+0:08
25.2M
25.20 mi13:27:353:19:287:553:03
8:51
+0:36
Finish
26.22 mi13:35:353:27:287:558:00
7:51
-1:00

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

7:42 /mi

Average Pace

7:55 /mi

Slowest Pace

8:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:24:25

99% of race

Time at Steady Pace

3:03

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:55 /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 mi10:32:3824:317:5324:31
7:53
#15599
10K
6.21 mi10:57:1149:047:5424:33
7:54
#15641
15K
9.32 mi11:21:191:13:127:5124:08
7:46
#15119
20K
12.43 mi11:45:211:37:147:4924:02
7:44
#14447
Half
13.11 mi11:50:361:42:297:495:15
7:42
#14384
25K
15.53 mi12:09:252:01:187:4918:49
7:46
#13958
30K
18.64 mi12:34:072:26:007:5024:42
7:57
#13356
20M
20.00 mi12:45:002:36:537:5110:53
8:01
#13078
21M
21.00 mi12:53:222:45:157:528:22
8:22
#12865
35K
21.75 mi12:59:102:51:037:525:48
7:45
#12765
23M
23.00 mi13:09:223:01:157:5310:12
8:09
#12614
24M
24.00 mi13:17:293:09:227:538:07
8:07
#12563
40K
24.85 mi13:24:323:16:257:547:03
8:15
#12500
25.2M
25.20 mi13:27:353:19:287:553:03
8:51
#12468
Finish
26.22 mi13:35:353:27:287:558:00
7:51
#12439
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi155994890489014104(Top 50%)4076(Top 33%)4076(Top 75%)
10K6.21 mi3.10 mi15641-424917-274917-2715676(Top 55%)4926(Top 40%)4926(Top 90%)
15K9.32 mi3.11 mi15119+5224627+2904627+29014104(Top 50%)4076(Top 33%)4076(Top 75%)
20K12.43 mi3.11 mi14447+6724259+3684259+36812729(Top 45%)3403(Top 28%)3403(Top 62%)
Half13.11 mi0.68 mi14384+634228+314228+3113398(Top 47%)3709(Top 30%)3709(Top 68%)
25K15.53 mi2.42 mi13958+4264016+2124016+21212053(Top 42%)3147(Top 26%)3147(Top 58%)
30K18.64 mi3.11 mi13356+6023746+2703746+27011051(Top 39%)2815(Top 23%)2815(Top 51%)
20M20.00 mi1.36 mi13078+2783625+1213625+12110539(Top 37%)2713(Top 22%)2713(Top 50%)
21M21.00 mi1.00 mi12865+2133540+853540+859688(Top 34%)2475(Top 20%)2475(Top 45%)
35K21.75 mi0.75 mi12765+1003503+373503+3710528(Top 37%)2879(Top 24%)2879(Top 53%)
23M23.00 mi1.25 mi12614+1513456+473456+4711057(Top 39%)3259(Top 27%)3259(Top 60%)
24M24.00 mi1.00 mi12563+513453+33453+312044(Top 42%)3823(Top 31%)3823(Top 70%)
40K24.85 mi0.85 mi12500+633456-33456-311853(Top 42%)3840(Top 31%)3840(Top 70%)
25.2M25.20 mi0.35 mi12468+323454+23454+210990(Top 39%)3484(Top 28%)3484(Top 64%)
Finish26.22 mi1.02 mi12439+293466-123466-1211842(Top 42%)3850(Top 31%)3850(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

14104

Females

4076

F18-39

4076

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

15676

Females

4926

F18-39

4926

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

14104

Females

4076

F18-39

4076

15K→20K

9.3 - 12.4 mi

Top 45%
×5stories
+106ft-86ft

Overall

12729

Females

3403

F18-39

3403

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

13398

Females

3709

F18-39

3709

Half→25K

13.1 - 15.5 mi

Top 42%
×4stories
+66ft-88ft

Overall

12053

Females

3147

F18-39

3147

25K→30K

15.5 - 18.6 mi

Top 39%
×9stories
+181ft-148ft

Overall

11051

Females

2815

F18-39

2815

30K→20M

18.6 - 20.0 mi

Top 37%
×5stories
+64ft-50ft

Overall

10539

Females

2713

F18-39

2713

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9688

Females

2475

F18-39

2475

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

10528

Females

2879

F18-39

2879

35K→23M

21.8 - 23.0 mi

Top 39%
×5stories
+23ft-63ft

Overall

11057

Females

3259

F18-39

3259

23M→24M

23.0 - 24.0 mi

Top 42%
×6stories
+12ft-82ft

Overall

12044

Females

3823

F18-39

3823

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

11853

Females

3840

F18-39

3840

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10990

Females

3484

F18-39

3484

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2stories
+22ft-21ft

Overall

11842

Females

3850

F18-39

3850

Passing Analysis

Category:
Athletes Passed
3812
Passed By
652
Net Change
+3160
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15599
5K → 10K304346-42#15599#15641
10K → 15K54523+522#15641#15119
15K → 20K6764+672#15119#14447
20K → Half7613+63#14447#14384
Half → 25K44014+426#14384#13958
25K → 30K61513+602#13958#13356
30K → 20M2846+278#13356#13078
20M → 21M22815+213#13078#12865
21M → 35K11111+100#12865#12765
35K → 23M19241+151#12765#12614
23M → 24M9948+51#12614#12563
24M → 40K10138+63#12563#12500
40K → 25.2M5018+32#12500#12468
25.2M → Finish9162+29#12468#12439
TOTALS3812652+3160
📊

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