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BOSTON MARATHON 2025

Caitlin O'Brien

Bib: 29360•F

RI

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
31:10
Rank: #25658
Start → 5K
31:10 | 10:02/mi
10K· 6.21 mi
1:01:46
Rank: #25287 (+371)
5K → 10K
30:36 | 9:51/mi
15K· 9.32 mi
1:32:20
Rank: #25070 (+217)
10K → 15K
30:34 | 9:50/mi
20K· 12.43 mi
2:04:12
Rank: #25005 (+65)
15K → 20K
31:52 | 10:15/mi
Half· 13.11 mi
2:10:50
Rank: #24951 (+54)
20K → Half
6:38 | 9:43/mi
25K· 15.53 mi
2:35:30
Rank: #24738 (+213)
Half → 25K
24:40 | 10:10/mi
30K· 18.64 mi
3:08:14
Rank: #24440 (+298)
25K → 30K
32:44 | 10:32/mi
20M
3:23:28
Rank: #24429 (+11)
30K → 20M
15:14 | 11:13/mi
21M
3:34:24
Rank: #24249 (+180)
20M → 21M
10:56 | 10:56/mi
35K· 21.75 mi
3:42:14
Rank: #24219 (+30)
21M → 35K
7:50 | 10:28/mi
23M
3:55:41
Rank: #24116 (+103)
35K → 23M
13:27 | 10:45/mi
24M
4:05:53
Rank: #24028 (+88)
23M → 24M
10:12 | 10:12/mi
40K· 24.85 mi
4:14:48
Rank: #23957 (+71)
24M → 40K
8:55 | 10:26/mi
25.2M
4:18:39
Rank: #23919 (+38)
40K → 25.2M
3:51 | 11:10/mi
Finish· 26.22 mi
4:28:29
Rank: #23862 (+57)
25.2M → Finish
9:50 | 9:39/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:10:50
Pace9:59 /mi
2nd Half
Distance13.11 mi
Time2:17:39
Pace10:30 /mi
📊Positive Split: 5.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:0231:1010:0231:10
10:02
-
10K
6.21 mi12:20:381:01:469:5630:36
9:51
-0:11
15K
9.32 mi12:51:121:32:209:5430:34
9:50
-0:01
20K
12.43 mi13:23:042:04:1210:0031:52
10:15
+0:25
Half
13.11 mi13:29:422:10:509:596:38
9:43
-0:32
25K
15.53 mi13:54:222:35:3010:0124:40
10:10
+0:27
30K
18.64 mi14:27:063:08:1410:0632:44
10:32
+0:22
20M
20.00 mi14:42:203:23:2810:1015:14
11:13
+0:41
21M
21.00 mi14:53:163:34:2410:1310:56
10:56
-0:17
35K
21.75 mi15:01:063:42:1410:137:50
10:28
-0:28
23M
23.00 mi15:14:333:55:4110:1513:27
10:45
+0:17
24M
24.00 mi15:24:454:05:5310:1510:12
10:12
-0:33
40K
24.85 mi15:33:404:14:4810:158:55
10:26
+0:14
25.2M
25.20 mi15:37:314:18:3910:163:51
11:10
+0:44
Finish
26.22 mi15:47:214:28:2910:159:50
9:39
-1:31

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

9:39 /mi

Average Pace

10:15 /mi

Slowest Pace

11:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:45:01

84% of race

Time at Steady Pace

43:28

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 10:14 /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 mi11:50:0231:1010:0231:10
10:02
#25658
10K
6.21 mi12:20:381:01:469:5630:36
9:51
#25287
15K
9.32 mi12:51:121:32:209:5430:34
9:50
#25070
20K
12.43 mi13:23:042:04:1210:0031:52
10:15
#25005
Half
13.11 mi13:29:422:10:509:596:38
9:43
#24951
25K
15.53 mi13:54:222:35:3010:0124:40
10:10
#24738
30K
18.64 mi14:27:063:08:1410:0632:44
10:32
#24440
20M
20.00 mi14:42:203:23:2810:1015:14
11:13
#24429
21M
21.00 mi14:53:163:34:2410:1310:56
10:56
#24249
35K
21.75 mi15:01:063:42:1410:137:50
10:28
#24219
23M
23.00 mi15:14:333:55:4110:1513:27
10:45
#24116
24M
24.00 mi15:24:454:05:5310:1510:12
10:12
#24028
40K
24.85 mi15:33:404:14:4810:158:55
10:26
#23957
25.2M
25.20 mi15:37:314:18:3910:163:51
11:10
#23919
Finish
26.22 mi15:47:214:28:2910:159:50
9:39
#23862
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25658105621056224634(Top 87%)10023(Top 82%)10023(Top 183%)
10K6.21 mi3.10 mi25287+37110388+17410388+17424989(Top 88%)10231(Top 84%)10231(Top 187%)
15K9.32 mi3.11 mi25070+21710260+12810260+12824634(Top 87%)10023(Top 82%)10023(Top 183%)
20K12.43 mi3.11 mi25005+6510234+2610234+2624757(Top 87%)10131(Top 83%)10131(Top 185%)
Half13.11 mi0.68 mi24951+5410213+2110213+2124197(Top 85%)9817(Top 80%)9817(Top 180%)
25K15.53 mi2.42 mi24738+21310112+10110112+10123676(Top 83%)9577(Top 78%)9577(Top 175%)
30K18.64 mi3.11 mi24440+2989966+1469966+14623015(Top 81%)9331(Top 76%)9331(Top 171%)
20M20.00 mi1.36 mi24429+119975-99975-924029(Top 85%)9965(Top 81%)9965(Top 182%)
21M21.00 mi1.00 mi24249+1809899+769899+7621229(Top 75%)8578(Top 70%)8578(Top 157%)
35K21.75 mi0.75 mi24219+309897+29897+223116(Top 81%)9612(Top 79%)9612(Top 176%)
23M23.00 mi1.25 mi24116+1039857+409857+4022629(Top 80%)9414(Top 77%)9414(Top 172%)
24M24.00 mi1.00 mi24028+889826+319826+3121964(Top 77%)9120(Top 75%)9120(Top 167%)
40K24.85 mi0.85 mi23957+719799+279799+2721744(Top 77%)9069(Top 74%)9069(Top 166%)
25.2M25.20 mi0.35 mi23919+389783+169783+1621185(Top 75%)8768(Top 72%)8768(Top 160%)
Finish26.22 mi1.02 mi23862+579765+189765+1821752(Top 77%)9045(Top 74%)9045(Top 165%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21stories
+97ft-345ft

Overall

24634

Females

10023

F18-39

10023

5K→10K

3.1 - 6.2 mi

Top 88%
×5stories
+79ft-138ft

Overall

24989

Females

10231

F18-39

10231

10K→15K

6.2 - 9.3 mi

Top 87%
×3stories
+67ft-78ft

Overall

24634

Females

10023

F18-39

10023

15K→20K

9.3 - 12.4 mi

Top 87%
×5stories
+106ft-86ft

Overall

24757

Females

10131

F18-39

10131

20K→Half

12.4 - 13.1 mi

Top 85%
×2stories
+19ft-37ft

Overall

24197

Females

9817

F18-39

9817

Half→25K

13.1 - 15.5 mi

Top 83%
×4stories
+66ft-88ft

Overall

23676

Females

9577

F18-39

9577

25K→30K

15.5 - 18.6 mi

Top 81%
×9stories
+181ft-148ft

Overall

23015

Females

9331

F18-39

9331

30K→20M

18.6 - 20.0 mi

Top 85%
×5stories
+64ft-50ft

Overall

24029

Females

9965

F18-39

9965

20M→21M

20.0 - 21.0 mi

Top 75%
×8stories
+106ft-24ft

Overall

21229

Females

8578

F18-39

8578

21M→35K

21.0 - 21.8 mi

Top 81%
×7stories
+17ft-86ft

Overall

23116

Females

9612

F18-39

9612

35K→23M

21.8 - 23.0 mi

Top 80%
×5stories
+23ft-63ft

Overall

22629

Females

9414

F18-39

9414

23M→24M

23.0 - 24.0 mi

Top 77%
×6stories
+12ft-82ft

Overall

21964

Females

9120

F18-39

9120

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21744

Females

9069

F18-39

9069

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

21185

Females

8768

F18-39

8768

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2stories
+22ft-21ft

Overall

21752

Females

9045

F18-39

9045

Passing Analysis

Category:
Athletes Passed
2167
Passed By
371
Net Change
+1796
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25658
5K → 10K42150+371#25658#25287
10K → 15K26245+217#25287#25070
15K → 20K16297+65#25070#25005
20K → Half628+54#25005#24951
Half → 25K23118+213#24951#24738
25K → 30K31214+298#24738#24440
30K → 20M6958+11#24440#24429
20M → 21M1822+180#24429#24249
21M → 35K5020+30#24249#24219
35K → 23M12118+103#24219#24116
23M → 24M924+88#24116#24028
24M → 40K8817+71#24028#23957
40K → 25.2M402+38#23957#23919
25.2M → Finish7518+57#23919#23862
TOTALS2167371+1796
📊

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