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BOSTON MARATHON 2025

Siobhan Mcdermott

Bib: 27271•F

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:07
Rank: #19351
Start → 5K
26:07 | 8:24/mi
10K· 6.21 mi
52:28
Rank: #19498 (-147)
5K → 10K
26:21 | 8:29/mi
15K· 9.32 mi
1:18:58
Rank: #19497 (+1)
10K → 15K
26:30 | 8:32/mi
20K· 12.43 mi
1:45:36
Rank: #19251 (+246)
15K → 20K
26:38 | 8:34/mi
Half· 13.11 mi
1:51:04
Rank: #19080 (+171)
20K → Half
5:28 | 8:01/mi
25K· 15.53 mi
2:11:46
Rank: #18812 (+268)
Half → 25K
20:42 | 8:32/mi
30K· 18.64 mi
2:40:11
Rank: #18711 (+101)
25K → 30K
28:25 | 9:09/mi
20M
2:52:12
Rank: #18489 (+222)
30K → 20M
12:01 | 8:51/mi
21M
3:03:04
Rank: #18716 (-227)
20M → 21M
10:52 | 10:52/mi
35K· 21.75 mi
3:09:13
Rank: #18552 (+164)
21M → 35K
6:09 | 8:13/mi
23M
3:20:37
Rank: #18411 (+141)
35K → 23M
11:24 | 9:06/mi
24M
3:29:02
Rank: #18215 (+196)
23M → 24M
8:25 | 8:25/mi
40K· 24.85 mi
3:36:32
Rank: #18082 (+133)
24M → 40K
7:30 | 8:46/mi
25.2M
3:39:48
Rank: #18031 (+51)
40K → 25.2M
3:16 | 9:28/mi
Finish· 26.22 mi
3:48:00
Rank: #17839 (+192)
25.2M → Finish
8:12 | 8:03/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:04
Pace8:28 /mi
2nd Half
Distance13.11 mi
Time1:56:56
Pace8:55 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:5626:078:2426:07
8:24
-
10K
6.21 mi12:09:1752:288:2726:21
8:29
+0:05
15K
9.32 mi12:35:471:18:588:2826:30
8:32
+0:03
20K
12.43 mi13:02:251:45:368:3026:38
8:34
+0:02
Half
13.11 mi13:07:531:51:048:285:28
8:01
-0:33
25K
15.53 mi13:28:352:11:468:2920:42
8:32
+0:31
30K
18.64 mi13:57:002:40:118:3628:25
9:09
+0:37
20M
20.00 mi14:09:012:52:128:3712:01
8:51
-0:18
21M
21.00 mi14:19:533:03:048:4310:52
10:52
+2:01
35K
21.75 mi14:26:023:09:138:426:09
8:13
-2:39
23M
23.00 mi14:37:263:20:378:4311:24
9:06
+0:53
24M
24.00 mi14:45:513:29:028:438:25
8:25
-0:41
40K
24.85 mi14:53:213:36:328:437:30
8:46
+0:21
25.2M
25.20 mi14:56:373:39:488:433:16
9:28
+0:42
Finish
26.22 mi15:04:493:48:008:428:12
8:03
-1:25

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

8:01 /mi

Average Pace

8:42 /mi

Slowest Pace

10:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

13:40

6% of race

Time at Steady Pace

2:40:23

70% of race

Time at Slower Pace

53:57

24% of race

Average Pace: 8:42 /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 mi11:42:5626:078:2426:07
8:24
#19351
10K
6.21 mi12:09:1752:288:2726:21
8:29
#19498
15K
9.32 mi12:35:471:18:588:2826:30
8:32
#19497
20K
12.43 mi13:02:251:45:368:3026:38
8:34
#19251
Half
13.11 mi13:07:531:51:048:285:28
8:01
#19080
25K
15.53 mi13:28:352:11:468:2920:42
8:32
#18812
30K
18.64 mi13:57:002:40:118:3628:25
9:09
#18711
20M
20.00 mi14:09:012:52:128:3712:01
8:51
#18489
21M
21.00 mi14:19:533:03:048:4310:52
10:52
#18716
35K
21.75 mi14:26:023:09:138:426:09
8:13
#18552
23M
23.00 mi14:37:263:20:378:4311:24
9:06
#18411
24M
24.00 mi14:45:513:29:028:438:25
8:25
#18215
40K
24.85 mi14:53:213:36:328:437:30
8:46
#18082
25.2M
25.20 mi14:56:373:39:488:433:16
9:28
#18031
Finish
26.22 mi15:04:493:48:008:428:12
8:03
#17839
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi193517111711119509(Top 69%)7175(Top 59%)7175(Top 131%)
10K6.21 mi3.10 mi19498-1477182-717182-7119694(Top 69%)7298(Top 60%)7298(Top 133%)
15K9.32 mi3.11 mi19497+17177+57177+519509(Top 69%)7175(Top 59%)7175(Top 131%)
20K12.43 mi3.11 mi19251+2467046+1317046+13118691(Top 66%)6738(Top 55%)6738(Top 123%)
Half13.11 mi0.68 mi19080+1716950+966950+9616108(Top 57%)5269(Top 43%)5269(Top 96%)
25K15.53 mi2.42 mi18812+2686802+1486802+14817426(Top 61%)6101(Top 50%)6101(Top 112%)
30K18.64 mi3.11 mi18711+1016775+276775+2718392(Top 65%)6778(Top 55%)6778(Top 124%)
20M20.00 mi1.36 mi18489+2226688+876688+8715936(Top 56%)5563(Top 45%)5563(Top 102%)
21M21.00 mi1.00 mi18716-2276846-1586846-15821039(Top 74%)8460(Top 69%)8460(Top 155%)
35K21.75 mi0.75 mi18552+1646768+786768+7813828(Top 49%)4608(Top 38%)4608(Top 84%)
23M23.00 mi1.25 mi18411+1416712+566712+5616862(Top 59%)6369(Top 52%)6369(Top 116%)
24M24.00 mi1.00 mi18215+1966635+776635+7714041(Top 49%)4860(Top 40%)4860(Top 89%)
40K24.85 mi0.85 mi18082+1336587+486587+4815073(Top 53%)5568(Top 46%)5568(Top 102%)
25.2M25.20 mi0.35 mi18031+516573+146573+1414542(Top 51%)5331(Top 44%)5331(Top 97%)
Finish26.22 mi1.02 mi17839+1926484+896484+8913250(Top 47%)4590(Top 38%)4590(Top 84%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

19509

Females

7175

F18-39

7175

5K→10K

3.1 - 6.2 mi

Top 69%
×5stories
+79ft-138ft

Overall

19694

Females

7298

F18-39

7298

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

19509

Females

7175

F18-39

7175

15K→20K

9.3 - 12.4 mi

Top 66%
×5stories
+106ft-86ft

Overall

18691

Females

6738

F18-39

6738

20K→Half

12.4 - 13.1 mi

Top 57%
×2stories
+19ft-37ft

Overall

16108

Females

5269

F18-39

5269

Half→25K

13.1 - 15.5 mi

Top 61%
×4stories
+66ft-88ft

Overall

17426

Females

6101

F18-39

6101

25K→30K

15.5 - 18.6 mi

Top 65%
×9stories
+181ft-148ft

Overall

18392

Females

6778

F18-39

6778

30K→20M

18.6 - 20.0 mi

Top 56%
×5stories
+64ft-50ft

Overall

15936

Females

5563

F18-39

5563

20M→21M

20.0 - 21.0 mi

Top 74%
×8stories
+106ft-24ft

Overall

21039

Females

8460

F18-39

8460

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13828

Females

4608

F18-39

4608

35K→23M

21.8 - 23.0 mi

Top 59%
×5stories
+23ft-63ft

Overall

16862

Females

6369

F18-39

6369

23M→24M

23.0 - 24.0 mi

Top 49%
×6stories
+12ft-82ft

Overall

14041

Females

4860

F18-39

4860

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15073

Females

5568

F18-39

5568

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14542

Females

5331

F18-39

5331

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2stories
+22ft-21ft

Overall

13250

Females

4590

F18-39

4590

Passing Analysis

Category:
Athletes Passed
2686
Passed By
1174
Net Change
+1512
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19351
5K → 10K183330-147#19351#19498
10K → 15K198197+1#19498#19497
15K → 20K32377+246#19497#19251
20K → Half1732+171#19251#19080
Half → 25K30032+268#19080#18812
25K → 30K285184+101#18812#18711
30K → 20M23614+222#18711#18489
20M → 21M44271-227#18489#18716
21M → 35K1651+164#18716#18552
35K → 23M17433+141#18552#18411
23M → 24M2004+196#18411#18215
24M → 40K14310+133#18215#18082
40K → 25.2M598+51#18082#18031
25.2M → Finish20311+192#18031#17839
TOTALS26861174+1512
📊

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