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BOSTON MARATHON 2025

Siobhain Heylin

Bib: 15834•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 39%
Gender (Female)
#0 / 12228
Top 23%
Division (F18-39)
#0 / 5469
Top 39%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:52
Rank: #10967
Start → 5K
22:52 | 7:22/mi
10K· 6.21 mi
45:53
Rank: #11107 (-140)
5K → 10K
23:01 | 7:25/mi
15K· 9.32 mi
1:09:01
Rank: #11117 (-10)
10K → 15K
23:08 | 7:27/mi
20K· 12.43 mi
1:32:34
Rank: #11221 (-104)
15K → 20K
23:33 | 7:35/mi
Half· 13.11 mi
1:37:40
Rank: #11226 (-5)
20K → Half
5:06 | 7:29/mi
25K· 15.53 mi
1:56:43
Rank: #11457 (-231)
Half → 25K
19:03 | 7:51/mi
30K· 18.64 mi
2:22:07
Rank: #11633 (-176)
25K → 30K
25:24 | 8:11/mi
20M
2:33:17
Rank: #11587 (+46)
30K → 20M
11:10 | 8:13/mi
21M
2:42:02
Rank: #11613 (-26)
20M → 21M
8:45 | 8:45/mi
35K· 21.75 mi
2:47:53
Rank: #11579 (+34)
21M → 35K
5:51 | 7:49/mi
23M
2:57:55
Rank: #11447 (+132)
35K → 23M
10:02 | 8:01/mi
24M
3:05:37
Rank: #11274 (+173)
23M → 24M
7:42 | 7:42/mi
40K· 24.85 mi
3:12:22
Rank: #11181 (+93)
24M → 40K
6:45 | 7:54/mi
25.2M
3:15:20
Rank: #11129 (+52)
40K → 25.2M
2:58 | 8:36/mi
Finish· 26.22 mi
3:23:04
Rank: #11054 (+75)
25.2M → Finish
7:44 | 7:35/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:40
Pace7:27 /mi
2nd Half
Distance13.11 mi
Time1:45:24
Pace8:02 /mi
📊Positive Split: 7.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:3822:527:2222:52
7:22
-
10K
6.21 mi11:16:3945:537:2323:01
7:25
+0:03
15K
9.32 mi11:39:471:09:017:2423:08
7:27
+0:02
20K
12.43 mi12:03:201:32:347:2723:33
7:35
+0:08
Half
13.11 mi12:08:261:37:407:275:06
7:29
-0:06
25K
15.53 mi12:27:291:56:437:3119:03
7:51
+0:22
30K
18.64 mi12:52:532:22:077:3725:24
8:11
+0:20
20M
20.00 mi13:04:032:33:177:4011:10
8:13
+0:02
21M
21.00 mi13:12:482:42:027:438:45
8:45
+0:32
35K
21.75 mi13:18:392:47:537:435:51
7:49
-0:56
23M
23.00 mi13:28:412:57:557:4410:02
8:01
+0:12
24M
24.00 mi13:36:233:05:377:447:42
7:42
-0:19
40K
24.85 mi13:43:083:12:227:446:45
7:54
+0:12
25.2M
25.20 mi13:46:063:15:207:452:58
8:36
+0:42
Finish
26.22 mi13:53:503:23:047:457:44
7:35
-1:01

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

7:22 /mi

Average Pace

7:45 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:34:47

76% of race

Time at Steady Pace

39:32

19% of race

Time at Slower Pace

8:45

4% of race

Average Pace: 7:45 /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 mi10:53:3822:527:2222:52
7:22
#10967
10K
6.21 mi11:16:3945:537:2323:01
7:25
#11107
15K
9.32 mi11:39:471:09:017:2423:08
7:27
#11117
20K
12.43 mi12:03:201:32:347:2723:33
7:35
#11221
Half
13.11 mi12:08:261:37:407:275:06
7:29
#11226
25K
15.53 mi12:27:291:56:437:3119:03
7:51
#11457
30K
18.64 mi12:52:532:22:077:3725:24
8:11
#11633
20M
20.00 mi13:04:032:33:177:4011:10
8:13
#11587
21M
21.00 mi13:12:482:42:027:438:45
8:45
#11613
35K
21.75 mi13:18:392:47:537:435:51
7:49
#11579
23M
23.00 mi13:28:412:57:557:4410:02
8:01
#11447
24M
24.00 mi13:36:233:05:377:447:42
7:42
#11274
40K
24.85 mi13:43:083:12:227:446:45
7:54
#11181
25.2M
25.20 mi13:46:063:15:207:452:58
8:36
#11129
Finish
26.22 mi13:53:503:23:047:457:44
7:35
#11054
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi109672270227011310(Top 40%)2537(Top 21%)2537(Top 46%)
10K6.21 mi3.10 mi11107-1402352-822352-8211278(Top 40%)2457(Top 20%)2457(Top 45%)
15K9.32 mi3.11 mi11117-102380-282380-2811310(Top 40%)2537(Top 21%)2537(Top 46%)
20K12.43 mi3.11 mi11221-1042462-822462-8211444(Top 40%)2709(Top 22%)2709(Top 50%)
Half13.11 mi0.68 mi11226-52466-42466-411555(Top 41%)2714(Top 22%)2714(Top 50%)
25K15.53 mi2.42 mi11457-2312626-1602626-16012810(Top 45%)3561(Top 29%)3561(Top 65%)
30K18.64 mi3.11 mi11633-1762798-1722798-17212642(Top 45%)3636(Top 30%)3636(Top 66%)
20M20.00 mi1.36 mi11587+462818-202818-2011919(Top 42%)3395(Top 28%)3395(Top 62%)
21M21.00 mi1.00 mi11613-262873-552873-5511991(Top 42%)3584(Top 29%)3584(Top 66%)
35K21.75 mi0.75 mi11579+342877-42877-411006(Top 39%)3104(Top 25%)3104(Top 57%)
23M23.00 mi1.25 mi11447+1322857+202857+2010149(Top 36%)2816(Top 23%)2816(Top 51%)
24M24.00 mi1.00 mi11274+1732807+502807+509144(Top 32%)2400(Top 20%)2400(Top 44%)
40K24.85 mi0.85 mi11181+932784+232784+239461(Top 33%)2662(Top 22%)2662(Top 49%)
25.2M25.20 mi0.35 mi11129+522776+82776+89504(Top 33%)2781(Top 23%)2781(Top 51%)
Finish26.22 mi1.02 mi11054+752771+52771+59865(Top 35%)2924(Top 24%)2924(Top 53%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

11310

Females

2537

F18-39

2537

5K→10K

3.1 - 6.2 mi

Top 40%
×5stories
+79ft-138ft

Overall

11278

Females

2457

F18-39

2457

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

11310

Females

2537

F18-39

2537

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

11444

Females

2709

F18-39

2709

20K→Half

12.4 - 13.1 mi

Top 41%
×2stories
+19ft-37ft

Overall

11555

Females

2714

F18-39

2714

Half→25K

13.1 - 15.5 mi

Top 45%
×4stories
+66ft-88ft

Overall

12810

Females

3561

F18-39

3561

25K→30K

15.5 - 18.6 mi

Top 45%
×9stories
+181ft-148ft

Overall

12642

Females

3636

F18-39

3636

30K→20M

18.6 - 20.0 mi

Top 42%
×5stories
+64ft-50ft

Overall

11919

Females

3395

F18-39

3395

20M→21M

20.0 - 21.0 mi

Top 42%
×8stories
+106ft-24ft

Overall

11991

Females

3584

F18-39

3584

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

11006

Females

3104

F18-39

3104

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10149

Females

2816

F18-39

2816

23M→24M

23.0 - 24.0 mi

Top 32%
×6stories
+12ft-82ft

Overall

9144

Females

2400

F18-39

2400

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

9461

Females

2662

F18-39

2662

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

9504

Females

2781

F18-39

2781

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

9865

Females

2924

F18-39

2924

Passing Analysis

Category:
Athletes Passed
1789
Passed By
1876
Net Change
-87
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10967
5K → 10K203343-140#10967#11107
10K → 15K175185-10#11107#11117
15K → 20K143247-104#11117#11221
20K → Half3136-5#11221#11226
Half → 25K103334-231#11226#11457
25K → 30K175351-176#11457#11633
30K → 20M14195+46#11633#11587
20M → 21M97123-26#11587#11613
21M → 35K7137+34#11613#11579
35K → 23M16937+132#11579#11447
23M → 24M19017+173#11447#11274
24M → 40K11522+93#11274#11181
40K → 25.2M6614+52#11181#11129
25.2M → Finish11035+75#11129#11054
TOTALS17891876-87
📊

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