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BOSTON MARATHON 2025

Karel O'Brien

Bib: 31992•F

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F65-69)
#0 / 222
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
33:24
Rank: #27202
Start → 5K
33:24 | 10:45/mi
10K· 6.21 mi
1:08:37
Rank: #27375 (-173)
5K → 10K
35:13 | 11:20/mi
15K· 9.32 mi
1:44:19
Rank: #27305 (+70)
10K → 15K
35:42 | 11:29/mi
20K· 12.43 mi
2:20:20
Rank: #27146 (+159)
15K → 20K
36:01 | 11:36/mi
Half· 13.11 mi
2:28:18
Rank: #27153 (-7)
20K → Half
7:58 | 11:41/mi
25K· 15.53 mi
2:57:30
Rank: #27040 (+113)
Half → 25K
29:12 | 12:03/mi
30K· 18.64 mi
3:37:45
Rank: #27001 (+39)
25K → 30K
40:15 | 12:57/mi
20M
3:55:25
Rank: #26967 (+34)
30K → 20M
17:40 | 13:00/mi
21M
4:09:35
Rank: #26962 (+5)
20M → 21M
14:10 | 14:10/mi
35K· 21.75 mi
4:19:02
Rank: #26965 (-3)
21M → 35K
9:27 | 12:38/mi
23M
4:37:24
Rank: #27029 (-64)
35K → 23M
18:22 | 14:40/mi
24M
4:50:25
Rank: #27027 (+2)
23M → 24M
13:01 | 13:01/mi
40K· 24.85 mi
5:02:47
Rank: #27059 (-32)
24M → 40K
12:22 | 14:28/mi
25.2M
5:08:28
Rank: #27089 (-30)
40K → 25.2M
5:41 | 16:29/mi
Finish· 26.22 mi
5:20:14
Rank: #27073 (+16)
25.2M → Finish
11:46 | 11:33/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:28:18
Pace11:19 /mi
2nd Half
Distance13.11 mi
Time2:51:56
Pace13:07 /mi
📊Positive Split: 15.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:58:2233:2410:4533:24
10:45
-
10K
6.21 mi12:33:351:08:3711:0335:13
11:20
+0:35
15K
9.32 mi13:09:171:44:1911:1235:42
11:29
+0:09
20K
12.43 mi13:45:182:20:2011:1836:01
11:36
+0:07
Half
13.11 mi13:53:162:28:1811:197:58
11:41
+0:05
25K
15.53 mi14:22:282:57:3011:2629:12
12:03
+0:22
30K
18.64 mi15:02:433:37:4511:4140:15
12:57
+0:54
20M
20.00 mi15:20:233:55:2511:4617:40
13:00
+0:03
21M
21.00 mi15:34:334:09:3511:5314:10
14:10
+1:10
35K
21.75 mi15:44:004:19:0211:559:27
12:38
-1:32
23M
23.00 mi16:02:224:37:2412:0418:22
14:40
+2:02
24M
24.00 mi16:15:234:50:2512:0613:01
13:01
-1:39
40K
24.85 mi16:27:455:02:4712:1112:22
14:28
+1:27
25.2M
25.20 mi16:33:265:08:2812:145:41
16:29
+2:01
Finish
26.22 mi16:45:125:20:1412:1311:46
11:33
-4:56

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

10:45 /mi

Average Pace

12:13 /mi

Slowest Pace

16:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:40:04

50% of race

Time at Steady Pace

1:49:35

34% of race

Time at Slower Pace

50:35

16% of race

Average Pace: 12:13 /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 mi11:58:2233:2410:4533:24
10:45
#27202
10K
6.21 mi12:33:351:08:3711:0335:13
11:20
#27375
15K
9.32 mi13:09:171:44:1911:1235:42
11:29
#27305
20K
12.43 mi13:45:182:20:2011:1836:01
11:36
#27146
Half
13.11 mi13:53:162:28:1811:197:58
11:41
#27153
25K
15.53 mi14:22:282:57:3011:2629:12
12:03
#27040
30K
18.64 mi15:02:433:37:4511:4140:15
12:57
#27001
20M
20.00 mi15:20:233:55:2511:4617:40
13:00
#26967
21M
21.00 mi15:34:334:09:3511:5314:10
14:10
#26962
35K
21.75 mi15:44:004:19:0211:559:27
12:38
#26965
23M
23.00 mi16:02:224:37:2412:0418:22
14:40
#27029
24M
24.00 mi16:15:234:50:2512:0613:01
13:01
#27027
40K
24.85 mi16:27:455:02:4712:1112:22
14:28
#27059
25.2M
25.20 mi16:33:265:08:2812:145:41
16:29
#27089
Finish
26.22 mi16:45:125:20:1412:1311:46
11:33
#27073
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF65-69Seg. OverallSeg. FemalesSeg. F65-69
5K3.11 mi3.11 mi27202114491144927218(Top 96%)11499(Top 94%)11499(Top 5180%)
10K6.21 mi3.10 mi27375-17311578-12911578-12927424(Top 97%)11621(Top 95%)11621(Top 5235%)
15K9.32 mi3.11 mi27305+7011530+4811530+4827218(Top 96%)11499(Top 94%)11499(Top 5180%)
20K12.43 mi3.11 mi27146+15911449+8111449+8126728(Top 94%)11234(Top 92%)11234(Top 5060%)
Half13.11 mi0.68 mi27153-711456-711456-727208(Top 96%)11535(Top 94%)11535(Top 5196%)
25K15.53 mi2.42 mi27040+11311404+5211404+5226474(Top 93%)11125(Top 91%)11125(Top 5011%)
30K18.64 mi3.11 mi27001+3911394+1011394+1026625(Top 94%)11294(Top 92%)11294(Top 5087%)
20M20.00 mi1.36 mi26967+3411383+1111383+1126437(Top 93%)11249(Top 92%)11249(Top 5067%)
21M21.00 mi1.00 mi26962+511392-911392-926393(Top 93%)11257(Top 92%)11257(Top 5071%)
35K21.75 mi0.75 mi26965-311397-511397-526592(Top 94%)11385(Top 93%)11385(Top 5128%)
23M23.00 mi1.25 mi27029-6411445-4811445-4827737(Top 98%)11971(Top 98%)11971(Top 5392%)
24M24.00 mi1.00 mi27027+211451-611451-626870(Top 95%)11569(Top 95%)11569(Top 5211%)
40K24.85 mi0.85 mi27059-3211475-2411475-2427494(Top 97%)11866(Top 97%)11866(Top 5345%)
25.2M25.20 mi0.35 mi27089-3011498-2311498-2327899(Top 98%)12069(Top 99%)12069(Top 5436%)
Finish26.22 mi1.02 mi27073+1611493+511493+526194(Top 92%)11246(Top 92%)11246(Top 5066%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 96%
×21stories
+97ft-345ft

Overall

27218

Females

11499

F65-69

11499

5K→10K

3.1 - 6.2 mi

Top 97%
×5stories
+79ft-138ft

Overall

27424

Females

11621

F65-69

11621

10K→15K

6.2 - 9.3 mi

Top 96%
×3stories
+67ft-78ft

Overall

27218

Females

11499

F65-69

11499

15K→20K

9.3 - 12.4 mi

Top 94%
×5stories
+106ft-86ft

Overall

26728

Females

11234

F65-69

11234

20K→Half

12.4 - 13.1 mi

Top 96%
×2stories
+19ft-37ft

Overall

27208

Females

11535

F65-69

11535

Half→25K

13.1 - 15.5 mi

Top 93%
×4stories
+66ft-88ft

Overall

26474

Females

11125

F65-69

11125

25K→30K

15.5 - 18.6 mi

Top 94%
×9stories
+181ft-148ft

Overall

26625

Females

11294

F65-69

11294

30K→20M

18.6 - 20.0 mi

Top 93%
×5stories
+64ft-50ft

Overall

26437

Females

11249

F65-69

11249

20M→21M

20.0 - 21.0 mi

Top 93%
×8stories
+106ft-24ft

Overall

26393

Females

11257

F65-69

11257

21M→35K

21.0 - 21.8 mi

Top 94%
×7stories
+17ft-86ft

Overall

26592

Females

11385

F65-69

11385

35K→23M

21.8 - 23.0 mi

Top 98%
×5stories
+23ft-63ft

Overall

27737

Females

11971

F65-69

11971

23M→24M

23.0 - 24.0 mi

Top 95%
×6stories
+12ft-82ft

Overall

26870

Females

11569

F65-69

11569

24M→40K

24.0 - 24.9 mi

Top 97%
×1story
+6ft-20ft

Overall

27494

Females

11866

F65-69

11866

40K→25.2M

24.9 - 25.2 mi

Top 98%
×1story
+13ft-16ft

Overall

27899

Females

12069

F65-69

12069

25.2M→Finish

25.2 - 26.2 mi

Top 92%
×2stories
+22ft-21ft

Overall

26194

Females

11246

F65-69

11246

Passing Analysis

Category:
Athletes Passed
815
Passed By
686
Net Change
+129
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27202
5K → 10K79252-173#27202#27375
10K → 15K13767+70#27375#27305
15K → 20K18324+159#27305#27146
20K → Half1724-7#27146#27153
Half → 25K13926+113#27153#27040
25K → 30K9354+39#27040#27001
30K → 20M5622+34#27001#26967
20M → 21M2419+5#26967#26962
21M → 35K1417-3#26962#26965
35K → 23M1276-64#26965#27029
23M → 24M2119+2#27029#27027
24M → 40K1244-32#27027#27059
40K → 25.2M333-30#27059#27089
25.2M → Finish259+16#27089#27073
TOTALS815686+129
📊

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