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BOSTON MARATHON 2025

Alexa Bilsky

Bib: 11178•F

GA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 41%
Gender (Female)
#0 / 12228
Top 25%
Division (F18-39)
#0 / 5469
Top 42%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:58
Rank: #11267
Start → 5K
22:58 | 7:24/mi
10K· 6.21 mi
46:32
Rank: #12036 (-769)
5K → 10K
23:34 | 7:35/mi
15K· 9.32 mi
1:11:53
Rank: #13852 (-1816)
10K → 15K
25:21 | 8:10/mi
20K· 12.43 mi
1:38:12
Rank: #15115 (-1263)
15K → 20K
26:19 | 8:28/mi
Half· 13.11 mi
1:43:27
Rank: #15009 (+106)
20K → Half
5:15 | 7:42/mi
25K· 15.53 mi
2:02:57
Rank: #14852 (+157)
Half → 25K
19:30 | 8:03/mi
30K· 18.64 mi
2:27:36
Rank: #14023 (+829)
25K → 30K
24:39 | 7:56/mi
20M
2:38:30
Rank: #13715 (+308)
30K → 20M
10:54 | 8:01/mi
21M
2:46:49
Rank: #13425 (+290)
20M → 21M
8:19 | 8:19/mi
35K· 21.75 mi
2:52:35
Rank: #13292 (+133)
21M → 35K
5:46 | 7:42/mi
23M
3:02:00
Rank: #12861 (+431)
35K → 23M
9:25 | 7:31/mi
24M
3:09:11
Rank: #12499 (+362)
23M → 24M
7:11 | 7:11/mi
40K· 24.85 mi
3:15:20
Rank: #12173 (+326)
24M → 40K
6:09 | 7:12/mi
25.2M
3:17:54
Rank: #11979 (+194)
40K → 25.2M
2:34 | 7:27/mi
Finish· 26.22 mi
3:24:42
Rank: #11589 (+390)
25.2M → Finish
6:48 | 6:40/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:43:27
Pace7:53 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:41:15
Pace7:43 /mi
📊Negative Split: 2.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5322:587:2422:58
7:24
-
10K
6.21 mi11:13:2746:327:2923:34
7:35
+0:11
15K
9.32 mi11:38:481:11:537:4325:21
8:10
+0:35
20K
12.43 mi12:05:071:38:127:5426:19
8:28
+0:18
Half
13.11 mi12:10:221:43:277:535:15
7:42
-0:46
25K
15.53 mi12:29:522:02:577:5519:30
8:03
+0:21
30K
18.64 mi12:54:312:27:367:5524:39
7:56
-0:07
20M
20.00 mi13:05:252:38:307:5510:54
8:01
+0:05
21M
21.00 mi13:13:442:46:497:578:19
8:19
+0:18
35K
21.75 mi13:19:302:52:357:565:46
7:42
-0:37
23M
23.00 mi13:28:553:02:007:559:25
7:31
-0:11
24M
24.00 mi13:36:063:09:117:537:11
7:11
-0:20
40K
24.85 mi13:42:153:15:207:526:09
7:12
+0:01
25.2M
25.20 mi13:44:493:17:547:512:34
7:27
+0:15
Finish
26.22 mi13:51:373:24:427:496:48
6:40
-0:47

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

6:40 /mi

Average Pace

7:49 /mi

Slowest Pace

8:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

45:40

22% of race

Time at Steady Pace

44:00

21% of race

Time at Slower Pace

1:55:02

56% of race

Average Pace: 7:48 /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 mi10:49:5322:587:2422:58
7:24
#11267
10K
6.21 mi11:13:2746:327:2923:34
7:35
#12036
15K
9.32 mi11:38:481:11:537:4325:21
8:10
#13852
20K
12.43 mi12:05:071:38:127:5426:19
8:28
#15115
Half
13.11 mi12:10:221:43:277:535:15
7:42
#15009
25K
15.53 mi12:29:522:02:577:5519:30
8:03
#14852
30K
18.64 mi12:54:312:27:367:5524:39
7:56
#14023
20M
20.00 mi13:05:252:38:307:5510:54
8:01
#13715
21M
21.00 mi13:13:442:46:497:578:19
8:19
#13425
35K
21.75 mi13:19:302:52:357:565:46
7:42
#13292
23M
23.00 mi13:28:553:02:007:559:25
7:31
#12861
24M
24.00 mi13:36:063:09:117:537:11
7:11
#12499
40K
24.85 mi13:42:153:15:207:526:09
7:12
#12173
25.2M
25.20 mi13:44:493:17:547:512:34
7:27
#11979
Finish
26.22 mi13:51:373:24:427:496:48
6:40
#11589
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi112672412241217142(Top 60%)5810(Top 48%)5810(Top 106%)
10K6.21 mi3.10 mi12036-7692831-4192831-41912898(Top 45%)3314(Top 27%)3314(Top 61%)
15K9.32 mi3.11 mi13852-18163877-10463877-104617142(Top 60%)5810(Top 48%)5810(Top 106%)
20K12.43 mi3.11 mi15115-12634639-7624639-76218020(Top 63%)6348(Top 52%)6348(Top 116%)
Half13.11 mi0.68 mi15009+1064590+494590+4913376(Top 47%)3687(Top 30%)3687(Top 67%)
25K15.53 mi2.42 mi14852+1574536+544536+5414223(Top 50%)4316(Top 35%)4316(Top 79%)
30K18.64 mi3.11 mi14023+8294117+4194117+41910921(Top 38%)2740(Top 22%)2740(Top 50%)
20M20.00 mi1.36 mi13715+3083973+1443973+14410604(Top 37%)2742(Top 22%)2742(Top 50%)
21M21.00 mi1.00 mi13425+2903849+1243849+1249369(Top 33%)2328(Top 19%)2328(Top 43%)
35K21.75 mi0.75 mi13292+1333790+593790+5910186(Top 36%)2704(Top 22%)2704(Top 49%)
23M23.00 mi1.25 mi12861+4313588+2023588+2026780(Top 24%)1314(Top 11%)1314(Top 24%)
24M24.00 mi1.00 mi12499+3623420+1683420+1685772(Top 20%)993(Top 8%)993(Top 18%)
40K24.85 mi0.85 mi12173+3263296+1243296+1245066(Top 18%)813(Top 7%)813(Top 15%)
25.2M25.20 mi0.35 mi11979+1943211+853211+853258(Top 11%)395(Top 3%)395(Top 7%)
Finish26.22 mi1.02 mi11589+3903051+1603051+1603764(Top 13%)498(Top 4%)498(Top 9%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21stories
+97ft-345ft

Overall

17142

Females

5810

F18-39

5810

5K→10K

3.1 - 6.2 mi

Top 45%
×5stories
+79ft-138ft

Overall

12898

Females

3314

F18-39

3314

10K→15K

6.2 - 9.3 mi

Top 60%
×3stories
+67ft-78ft

Overall

17142

Females

5810

F18-39

5810

15K→20K

9.3 - 12.4 mi

Top 63%
×5stories
+106ft-86ft

Overall

18020

Females

6348

F18-39

6348

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

13376

Females

3687

F18-39

3687

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

14223

Females

4316

F18-39

4316

25K→30K

15.5 - 18.6 mi

Top 38%
×9stories
+181ft-148ft

Overall

10921

Females

2740

F18-39

2740

30K→20M

18.6 - 20.0 mi

Top 37%
×5stories
+64ft-50ft

Overall

10604

Females

2742

F18-39

2742

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

9369

Females

2328

F18-39

2328

21M→35K

21.0 - 21.8 mi

Top 36%
×7stories
+17ft-86ft

Overall

10186

Females

2704

F18-39

2704

35K→23M

21.8 - 23.0 mi

Top 24%
×5stories
+23ft-63ft

Overall

6780

Females

1314

F18-39

1314

23M→24M

23.0 - 24.0 mi

Top 20%
×6stories
+12ft-82ft

Overall

5772

Females

993

F18-39

993

24M→40K

24.0 - 24.9 mi

Top 18%
×1story
+6ft-20ft

Overall

5066

Females

813

F18-39

813

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

3258

Females

395

F18-39

395

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2stories
+22ft-21ft

Overall

3764

Females

498

F18-39

498

Passing Analysis

Category:
Athletes Passed
3740
Passed By
4062
Net Change
-322
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11267
5K → 10K52821-769#11267#12036
10K → 15K151831-1816#12036#13852
15K → 20K351298-1263#13852#15115
20K → Half1104+106#15115#15009
Half → 25K23982+157#15009#14852
25K → 30K8356+829#14852#14023
30K → 20M3146+308#14023#13715
20M → 21M2933+290#13715#13425
21M → 35K14310+133#13425#13292
35K → 23M4321+431#13292#12861
23M → 24M3620+362#12861#12499
24M → 40K3260+326#12499#12173
40K → 25.2M1940+194#12173#11979
25.2M → Finish3900+390#11979#11589
TOTALS37404062-322
📊

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