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BOSTON MARATHON 2025

Cara O'Brien

Bib: 23111•F

NC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 50%
Division (F45-49)
#0 / 1813
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:05
Rank: #21088
Start → 5K
27:05 | 8:43/mi
10K· 6.21 mi
54:24
Rank: #21198 (-110)
5K → 10K
27:19 | 8:48/mi
15K· 9.32 mi
1:21:57
Rank: #21214 (-16)
10K → 15K
27:33 | 8:52/mi
20K· 12.43 mi
1:49:21
Rank: #20934 (+280)
15K → 20K
27:24 | 8:49/mi
Half· 13.11 mi
1:55:13
Rank: #20866 (+68)
20K → Half
5:52 | 8:36/mi
25K· 15.53 mi
2:16:27
Rank: #20542 (+324)
Half → 25K
21:14 | 8:45/mi
30K· 18.64 mi
2:44:12
Rank: #19907 (+635)
25K → 30K
27:45 | 8:56/mi
20M
2:56:44
Rank: #19750 (+157)
30K → 20M
12:32 | 9:13/mi
21M
3:06:21
Rank: #19572 (+178)
20M → 21M
9:37 | 9:37/mi
35K· 21.75 mi
3:13:11
Rank: #19543 (+29)
21M → 35K
6:50 | 9:08/mi
23M
3:24:14
Rank: #19305 (+238)
35K → 23M
11:03 | 8:50/mi
24M
3:32:48
Rank: #19123 (+182)
23M → 24M
8:34 | 8:34/mi
40K· 24.85 mi
3:40:18
Rank: #18957 (+166)
24M → 40K
7:30 | 8:46/mi
25.2M
3:43:47
Rank: #18939 (+18)
40K → 25.2M
3:29 | 10:06/mi
Finish· 26.22 mi
3:52:45
Rank: #18898 (+41)
25.2M → Finish
8:58 | 8:48/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:13
Pace8:47 /mi
2nd Half
Distance13.11 mi
Time1:57:32
Pace8:58 /mi
📊Positive Split: 2.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:1827:058:4327:05
8:43
-
10K
6.21 mi11:50:3754:248:4527:19
8:48
+0:05
15K
9.32 mi12:18:101:21:578:4827:33
8:52
+0:04
20K
12.43 mi12:45:341:49:218:4827:24
8:49
-0:03
Half
13.11 mi12:51:261:55:138:475:52
8:36
-0:13
25K
15.53 mi13:12:402:16:278:4721:14
8:45
+0:09
30K
18.64 mi13:40:252:44:128:4927:45
8:56
+0:11
20M
20.00 mi13:52:572:56:448:5012:32
9:13
+0:17
21M
21.00 mi14:02:343:06:218:529:37
9:37
+0:24
35K
21.75 mi14:09:243:13:118:536:50
9:08
-0:29
23M
23.00 mi14:20:273:24:148:5311:03
8:50
-0:18
24M
24.00 mi14:29:013:32:488:528:34
8:34
-0:16
40K
24.85 mi14:36:313:40:188:527:30
8:46
+0:12
25.2M
25.20 mi14:40:003:43:478:533:29
10:06
+1:20
Finish
26.22 mi14:48:583:52:458:538:58
8:48
-1:18

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

8:34 /mi

Average Pace

8:53 /mi

Slowest Pace

10:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:39:39

94% of race

Time at Steady Pace

13:06

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:53 /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 mi11:23:1827:058:4327:05
8:43
#21088
10K
6.21 mi11:50:3754:248:4527:19
8:48
#21198
15K
9.32 mi12:18:101:21:578:4827:33
8:52
#21214
20K
12.43 mi12:45:341:49:218:4827:24
8:49
#20934
Half
13.11 mi12:51:261:55:138:475:52
8:36
#20866
25K
15.53 mi13:12:402:16:278:4721:14
8:45
#20542
30K
18.64 mi13:40:252:44:128:4927:45
8:56
#19907
20M
20.00 mi13:52:572:56:448:5012:32
9:13
#19750
21M
21.00 mi14:02:343:06:218:529:37
9:37
#19572
35K
21.75 mi14:09:243:13:118:536:50
9:08
#19543
23M
23.00 mi14:20:273:24:148:5311:03
8:50
#19305
24M
24.00 mi14:29:013:32:488:528:34
8:34
#19123
40K
24.85 mi14:36:313:40:188:527:30
8:46
#18957
25.2M
25.20 mi14:40:003:43:478:533:29
10:06
#18939
Finish
26.22 mi14:48:583:52:458:538:58
8:48
#18898
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi210888126812621383(Top 75%)8203(Top 67%)8203(Top 452%)
10K6.21 mi3.10 mi21198-1108161-358161-3521370(Top 75%)8236(Top 67%)8236(Top 454%)
15K9.32 mi3.11 mi21214-168154+78154+721383(Top 75%)8203(Top 67%)8203(Top 452%)
20K12.43 mi3.11 mi20934+2807995+1597995+15920038(Top 71%)7497(Top 61%)7497(Top 414%)
Half13.11 mi0.68 mi20866+687959+367959+3619840(Top 70%)7378(Top 60%)7378(Top 407%)
25K15.53 mi2.42 mi20542+3247794+1657794+16518726(Top 66%)6830(Top 56%)6830(Top 377%)
30K18.64 mi3.11 mi19907+6357471+3237471+32317337(Top 61%)6214(Top 51%)6214(Top 343%)
20M20.00 mi1.36 mi19750+1577401+707401+7017918(Top 63%)6667(Top 55%)6667(Top 368%)
21M21.00 mi1.00 mi19572+1787332+697332+6916666(Top 59%)6076(Top 50%)6076(Top 335%)
35K21.75 mi0.75 mi19543+297330+27330+218901(Top 67%)7398(Top 61%)7398(Top 408%)
23M23.00 mi1.25 mi19305+2387223+1077223+10715282(Top 54%)5492(Top 45%)5492(Top 303%)
24M24.00 mi1.00 mi19123+1827137+867137+8614990(Top 53%)5385(Top 44%)5385(Top 297%)
40K24.85 mi0.85 mi18957+1667074+637074+6315085(Top 53%)5580(Top 46%)5580(Top 308%)
25.2M25.20 mi0.35 mi18939+187075-17075-117526(Top 62%)6880(Top 56%)6880(Top 379%)
Finish26.22 mi1.02 mi18898+417072+37072+318060(Top 64%)7117(Top 58%)7117(Top 393%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21stories
+97ft-345ft

Overall

21383

Females

8203

F45-49

8203

5K→10K

3.1 - 6.2 mi

Top 75%
×5stories
+79ft-138ft

Overall

21370

Females

8236

F45-49

8236

10K→15K

6.2 - 9.3 mi

Top 75%
×3stories
+67ft-78ft

Overall

21383

Females

8203

F45-49

8203

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

20038

Females

7497

F45-49

7497

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

19840

Females

7378

F45-49

7378

Half→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

18726

Females

6830

F45-49

6830

25K→30K

15.5 - 18.6 mi

Top 61%
×9stories
+181ft-148ft

Overall

17337

Females

6214

F45-49

6214

30K→20M

18.6 - 20.0 mi

Top 63%
×5stories
+64ft-50ft

Overall

17918

Females

6667

F45-49

6667

20M→21M

20.0 - 21.0 mi

Top 59%
×8stories
+106ft-24ft

Overall

16666

Females

6076

F45-49

6076

21M→35K

21.0 - 21.8 mi

Top 67%
×7stories
+17ft-86ft

Overall

18901

Females

7398

F45-49

7398

35K→23M

21.8 - 23.0 mi

Top 54%
×5stories
+23ft-63ft

Overall

15282

Females

5492

F45-49

5492

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

14990

Females

5385

F45-49

5385

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15085

Females

5580

F45-49

5580

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17526

Females

6880

F45-49

6880

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2stories
+22ft-21ft

Overall

18060

Females

7117

F45-49

7117

Passing Analysis

Category:
Athletes Passed
3008
Passed By
818
Net Change
+2190
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21088
5K → 10K227337-110#21088#21198
10K → 15K201217-16#21198#21214
15K → 20K33858+280#21214#20934
20K → Half735+68#20934#20866
Half → 25K35026+324#20866#20542
25K → 30K64813+635#20542#19907
30K → 20M18023+157#19907#19750
20M → 21M21133+178#19750#19572
21M → 35K6334+29#19572#19543
35K → 23M2457+238#19543#19305
23M → 24M1864+182#19305#19123
24M → 40K1704+166#19123#18957
40K → 25.2M3517+18#18957#18939
25.2M → Finish8140+41#18939#18898
TOTALS3008818+2190
📊

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