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BOSTON MARATHON 2025

Mary Corcoran

Bib: 30405•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
27:51
Rank: #22258
Start → 5K
27:51 | 8:58/mi
10K· 6.21 mi
56:10
Rank: #22571 (-313)
5K → 10K
28:19 | 9:07/mi
15K· 9.32 mi
1:23:47
Rank: #22226 (+345)
10K → 15K
27:37 | 8:53/mi
20K· 12.43 mi
1:51:44
Rank: #21894 (+332)
15K → 20K
27:57 | 9:00/mi
Half· 13.11 mi
1:57:46
Rank: #21837 (+57)
20K → Half
6:02 | 8:51/mi
25K· 15.53 mi
2:20:02
Rank: #21619 (+218)
Half → 25K
22:16 | 9:11/mi
30K· 18.64 mi
2:52:50
Rank: #22064 (-445)
25K → 30K
32:48 | 10:33/mi
20M
3:10:07
Rank: #22574 (-510)
30K → 20M
17:17 | 12:43/mi
21M
3:25:04
Rank: #23059 (-485)
20M → 21M
14:57 | 14:57/mi
35K· 21.75 mi
3:33:59
Rank: #23188 (-129)
21M → 35K
8:55 | 11:55/mi
23M
3:53:32
Rank: #23878 (-690)
35K → 23M
19:33 | 15:37/mi
24M
4:10:27
Rank: #24498 (-620)
23M → 24M
16:55 | 16:55/mi
40K· 24.85 mi
4:23:02
Rank: #24708 (-210)
24M → 40K
12:35 | 14:43/mi
25.2M
4:27:53
Rank: #24738 (-30)
40K → 25.2M
4:51 | 14:04/mi
Finish· 26.22 mi
4:37:30
Rank: #24655 (+83)
25.2M → Finish
9:37 | 9:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:46
Pace8:59 /mi
2nd Half
Distance13.11 mi
Time2:39:44
Pace12:11 /mi
📊Positive Split: 35.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:5227:518:5827:51
8:58
-
10K
6.21 mi12:21:1156:109:0228:19
9:07
+0:09
15K
9.32 mi12:48:481:23:478:5927:37
8:53
-0:14
20K
12.43 mi13:16:451:51:448:5927:57
9:00
+0:07
Half
13.11 mi13:22:471:57:468:596:02
8:51
-0:09
25K
15.53 mi13:45:032:20:029:0122:16
9:11
+0:20
30K
18.64 mi14:17:512:52:509:1632:48
10:33
+1:22
20M
20.00 mi14:35:083:10:079:3017:17
12:43
+2:10
21M
21.00 mi14:50:053:25:049:4614:57
14:57
+2:14
35K
21.75 mi14:59:003:33:599:508:55
11:55
-3:02
23M
23.00 mi15:18:333:53:3210:0919:33
15:37
+3:42
24M
24.00 mi15:35:284:10:2710:2616:55
16:55
+1:18
40K
24.85 mi15:48:034:23:0210:3512:35
14:43
-2:12
25.2M
25.20 mi15:52:544:27:5310:384:51
14:04
-0:39
Finish
26.22 mi16:02:314:37:3010:359:37
9:26
-4:38

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

8:51 /mi

Average Pace

10:35 /mi

Slowest Pace

16:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:46

42% of race

Time at Steady Pace

1:13:36

27% of race

Time at Slower Pace

1:26:08

31% of race

Average Pace: 10:35 /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 mi11:52:5227:518:5827:51
8:58
#22258
10K
6.21 mi12:21:1156:109:0228:19
9:07
#22571
15K
9.32 mi12:48:481:23:478:5927:37
8:53
#22226
20K
12.43 mi13:16:451:51:448:5927:57
9:00
#21894
Half
13.11 mi13:22:471:57:468:596:02
8:51
#21837
25K
15.53 mi13:45:032:20:029:0122:16
9:11
#21619
30K
18.64 mi14:17:512:52:509:1632:48
10:33
#22064
20M
20.00 mi14:35:083:10:079:3017:17
12:43
#22574
21M
21.00 mi14:50:053:25:049:4614:57
14:57
#23059
35K
21.75 mi14:59:003:33:599:508:55
11:55
#23188
23M
23.00 mi15:18:333:53:3210:0919:33
15:37
#23878
24M
24.00 mi15:35:284:10:2710:2616:55
16:55
#24498
40K
24.85 mi15:48:034:23:0210:3512:35
14:43
#24708
25.2M
25.20 mi15:52:544:27:5310:384:51
14:04
#24738
Finish
26.22 mi16:02:314:37:3010:359:37
9:26
#24655
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi222588771877121500(Top 76%)8280(Top 68%)8280(Top 151%)
10K6.21 mi3.10 mi22571-3138924-1538924-15322867(Top 81%)9058(Top 74%)9058(Top 166%)
15K9.32 mi3.11 mi22226+3458713+2118713+21121500(Top 76%)8280(Top 68%)8280(Top 151%)
20K12.43 mi3.11 mi21894+3328545+1688545+16820936(Top 74%)8021(Top 66%)8021(Top 147%)
Half13.11 mi0.68 mi21837+578513+328513+3221059(Top 74%)8092(Top 66%)8092(Top 148%)
25K15.53 mi2.42 mi21619+2188392+1218392+12120688(Top 73%)7922(Top 65%)7922(Top 145%)
30K18.64 mi3.11 mi22064-4458656-2648656-26423055(Top 81%)9351(Top 76%)9351(Top 171%)
20M20.00 mi1.36 mi22574-5108976-3208976-32026158(Top 92%)11095(Top 91%)11095(Top 203%)
21M21.00 mi1.00 mi23059-4859258-2829258-28227097(Top 95%)11613(Top 95%)11613(Top 212%)
35K21.75 mi0.75 mi23188-1299334-769334-7625715(Top 91%)10955(Top 90%)10955(Top 200%)
23M23.00 mi1.25 mi23878-6909738-4049738-40428082(Top 99%)12119(Top 99%)12119(Top 222%)
24M24.00 mi1.00 mi24498-62010069-33110069-33128307(Top 100%)12199(Top 100%)12199(Top 223%)
40K24.85 mi0.85 mi24708-21010198-12910198-12927625(Top 97%)11933(Top 98%)11933(Top 218%)
25.2M25.20 mi0.35 mi24738-3010222-2410222-2426324(Top 93%)11345(Top 93%)11345(Top 207%)
Finish26.22 mi1.02 mi24655+8310182+4010182+4020928(Top 74%)8630(Top 71%)8630(Top 158%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21stories
+97ft-345ft

Overall

21500

Females

8280

F18-39

8280

5K→10K

3.1 - 6.2 mi

Top 81%
×5stories
+79ft-138ft

Overall

22867

Females

9058

F18-39

9058

10K→15K

6.2 - 9.3 mi

Top 76%
×3stories
+67ft-78ft

Overall

21500

Females

8280

F18-39

8280

15K→20K

9.3 - 12.4 mi

Top 74%
×5stories
+106ft-86ft

Overall

20936

Females

8021

F18-39

8021

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

21059

Females

8092

F18-39

8092

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

20688

Females

7922

F18-39

7922

25K→30K

15.5 - 18.6 mi

Top 81%
×9stories
+181ft-148ft

Overall

23055

Females

9351

F18-39

9351

30K→20M

18.6 - 20.0 mi

Top 92%
×5stories
+64ft-50ft

Overall

26158

Females

11095

F18-39

11095

20M→21M

20.0 - 21.0 mi

Top 95%
×8stories
+106ft-24ft

Overall

27097

Females

11613

F18-39

11613

21M→35K

21.0 - 21.8 mi

Top 91%
×7stories
+17ft-86ft

Overall

25715

Females

10955

F18-39

10955

35K→23M

21.8 - 23.0 mi

Top 99%
×5stories
+23ft-63ft

Overall

28082

Females

12119

F18-39

12119

23M→24M

23.0 - 24.0 mi

Top 100%
×6stories
+12ft-82ft

Overall

28307

Females

12199

F18-39

12199

24M→40K

24.0 - 24.9 mi

Top 97%
×1story
+6ft-20ft

Overall

27625

Females

11933

F18-39

11933

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

26324

Females

11345

F18-39

11345

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2stories
+22ft-21ft

Overall

20928

Females

8630

F18-39

8630

Passing Analysis

Category:
Athletes Passed
1443
Passed By
3840
Net Change
-2397
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22258
5K → 10K132445-313#22258#22571
10K → 15K39550+345#22571#22226
15K → 20K36937+332#22226#21894
20K → Half658+57#21894#21837
Half → 25K25739+218#21837#21619
25K → 30K81526-445#21619#22064
30K → 20M18528-510#22064#22574
20M → 21M5490-485#22574#23059
21M → 35K13142-129#23059#23188
35K → 23M10700-690#23188#23878
23M → 24M1621-620#23878#24498
24M → 40K1211-210#24498#24708
40K → 25.2M939-30#24708#24738
25.2M → Finish874+83#24738#24655
TOTALS14433840-2397
📊

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