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BOSTON MARATHON 2025

Catherine O'Brien

Bib: 27968•F

NY

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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:32/mi
29:37
↑ 97↓ 3451.5%
10K· 6.21 mi
10:07/mi
1:01:03
↑ 79↓ 1380.4%
15K· 9.32 mi
9:45/mi
1:31:20
↑ 67↓ 78
20K· 12.43 mi
10:04/mi
2:02:37
↑ 106↓ 860.1%
Half· 13.11 mi
9:48/mi
2:09:18
↑ 19↓ 370.5%
25K· 15.53 mi
10:20/mi
2:34:21
↑ 66↓ 880.2%
30K· 18.64 mi
10:56/mi
3:08:18
↑ 181↓ 1480.2%
20M
11:13/mi
3:23:33
↑ 64↓ 500.2%
21M
11:52/mi
3:35:25
↑ 106↓ 241.6%
35K· 21.75 mi
11:03/mi
3:43:41
↑ 17↓ 861.7%
23M
12:15/mi
3:59:01
↑ 23↓ 630.6%
24M
11:26/mi
4:10:27
↓ 821.3%
40K· 24.85 mi
12:32/mi
4:21:10
↓ 200.3%
25.2M
13:12/mi
4:25:43
↑ 13↓ 160.2%
Finish· 26.22 mi
10:22/mi
4:36:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:09:18
Pace9:52 /mi
2nd Half
Distance13.11 mi
Time2:26:59
Pace11:13 /mi
📊Positive Split: 13.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:3829:379:3229:37
9:32
-
10K
6.21 mi12:18:041:01:039:5031:26
10:07
+0:35
15K
9.32 mi12:48:211:31:209:4830:17
9:45
-0:22
20K
12.43 mi13:19:382:02:379:5231:17
10:04
+0:19
Half
13.11 mi13:26:192:09:189:526:41
9:48
-0:16
25K
15.53 mi13:51:222:34:219:5625:03
10:20
+0:32
30K
18.64 mi14:25:193:08:1810:0633:57
10:56
+0:36
20M
20.00 mi14:40:343:23:3310:1115:15
11:13
+0:17
21M
21.00 mi14:52:263:35:2510:1511:52
11:52
+0:39
35K
21.75 mi15:00:423:43:4110:178:16
11:03
-0:49
23M
23.00 mi15:16:023:59:0110:2415:20
12:15
+1:12
24M
24.00 mi15:27:284:10:2710:2611:26
11:26
-0:49
40K
24.85 mi15:38:114:21:1010:3010:43
12:32
+1:06
25.2M
25.20 mi15:42:444:25:4310:334:33
13:12
+0:40
Finish
26.22 mi15:53:184:36:1710:3310:34
10:22
-2:50

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

9:32 /mi

Average Pace

10:33 /mi

Slowest Pace

13:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:44:55

60% of race

Time at Steady Pace

1:08:54

25% of race

Time at Slower Pace

42:28

15% of race

Average Pace: 10:32 /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 mi11:46:3829:379:3229:37
9:32
#24358
10K
6.21 mi12:18:041:01:039:5031:26
10:07
#25029
15K
9.32 mi12:48:211:31:209:4830:17
9:45
#24819
20K
12.43 mi13:19:382:02:379:5231:17
10:04
#24683
Half
13.11 mi13:26:192:09:189:526:41
9:48
#24662
25K
15.53 mi13:51:222:34:219:5625:03
10:20
#24582
30K
18.64 mi14:25:193:08:1810:0633:57
10:56
#24453
20M
20.00 mi14:40:343:23:3310:1115:15
11:13
#24440
21M
21.00 mi14:52:263:35:2510:1511:52
11:52
#24367
35K
21.75 mi15:00:423:43:4110:178:16
11:03
#24373
23M
23.00 mi15:16:023:59:0110:2415:20
12:15
#24472
24M
24.00 mi15:27:284:10:2710:2611:26
11:26
#24502
40K
24.85 mi15:38:114:21:1010:3010:43
12:32
#24556
25.2M
25.20 mi15:42:444:25:4310:334:33
13:12
#24571
Finish
26.22 mi15:53:184:36:1710:3310:34
10:22
#24553
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi243589878987824430(Top 86%)9914(Top 81%)9914(Top 181%)
10K6.21 mi3.10 mi25029-67110247-36910247-36925569(Top 90%)10565(Top 86%)10565(Top 193%)
15K9.32 mi3.11 mi24819+21010125+12210125+12224430(Top 86%)9914(Top 81%)9914(Top 181%)
20K12.43 mi3.11 mi24683+13610063+6210063+6224391(Top 86%)9928(Top 81%)9928(Top 182%)
Half13.11 mi0.68 mi24662+2110052+1110052+1124397(Top 86%)9941(Top 81%)9941(Top 182%)
25K15.53 mi2.42 mi24582+8010022+3010022+3024028(Top 85%)9757(Top 80%)9757(Top 178%)
30K18.64 mi3.11 mi24453+1299975+479975+4723885(Top 84%)9809(Top 80%)9809(Top 179%)
20M20.00 mi1.36 mi24440+139982-79982-724060(Top 85%)9985(Top 82%)9985(Top 183%)
21M21.00 mi1.00 mi24367+739964+189964+1823367(Top 82%)9695(Top 79%)9695(Top 177%)
35K21.75 mi0.75 mi24373-69976-129976-1224332(Top 86%)10242(Top 84%)10242(Top 187%)
23M23.00 mi1.25 mi24472-9910045-6910045-6925477(Top 90%)10845(Top 89%)10845(Top 198%)
24M24.00 mi1.00 mi24502-3010072-2710072-2724792(Top 87%)10532(Top 86%)10532(Top 193%)
40K24.85 mi0.85 mi24556-5410111-3910111-3925714(Top 91%)10999(Top 90%)10999(Top 201%)
25.2M25.20 mi0.35 mi24571-1510123-1210123-1225311(Top 89%)10845(Top 89%)10845(Top 198%)
Finish26.22 mi1.02 mi24553+1810126-310126-323974(Top 84%)10160(Top 83%)10160(Top 186%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 86%
×21story building
+97ft-345ft

Overall

24430

Females

9914

F18-39

9914

5K→10K

3.1 - 6.2 mi

Top 90%
×5story building
+79ft-138ft

Overall

25569

Females

10565

F18-39

10565

10K→15K

6.2 - 9.3 mi

Top 86%
×3story building
+67ft-78ft

Overall

24430

Females

9914

F18-39

9914

15K→20K

9.3 - 12.4 mi

Top 86%
×5story building
+106ft-86ft

Overall

24391

Females

9928

F18-39

9928

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

24397

Females

9941

F18-39

9941

Half→25K

13.1 - 15.5 mi

Top 85%
×4story building
+66ft-88ft

Overall

24028

Females

9757

F18-39

9757

25K→30K

15.5 - 18.6 mi

Top 84%
×9story building
+181ft-148ft

Overall

23885

Females

9809

F18-39

9809

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

24060

Females

9985

F18-39

9985

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23367

Females

9695

F18-39

9695

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

24332

Females

10242

F18-39

10242

35K→23M

21.8 - 23.0 mi

Top 90%
×5story building
+23ft-63ft

Overall

25477

Females

10845

F18-39

10845

23M→24M

23.0 - 24.0 mi

Top 87%
×6story building
+12ft-82ft

Overall

24792

Females

10532

F18-39

10532

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

25714

Females

10999

F18-39

10999

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

25311

Females

10845

F18-39

10845

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2story building
+22ft-21ft

Overall

23974

Females

10160

F18-39

10160

Passing Analysis

Category:
Athletes Passed
1217
Passed By
1412
Net Change
-195
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24358
5K → 10K45716-671#24358#25029
10K → 15K25444+210#25029#24819
15K → 20K21175+136#24819#24683
20K → Half3615+21#24683#24662
Half → 25K13656+80#24662#24582
25K → 30K19667+129#24582#24453
30K → 20M6754+13#24453#24440
20M → 21M10633+73#24440#24367
21M → 35K3036-6#24367#24373
35K → 23M34133-99#24373#24472
23M → 24M3767-30#24472#24502
24M → 40K1367-54#24502#24556
40K → 25.2M1126-15#24556#24571
25.2M → Finish4123+18#24571#24553
TOTALS12171412-195
📊

Passing Visuals

Category:
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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