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BOSTON MARATHON 2025

Megan O'brien

Bib: 29884•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

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
8:57/mi
27:49
↑ 97↓ 3451.5%
10K· 6.21 mi
8:46/mi
55:02
↑ 79↓ 1380.4%
15K· 9.32 mi
8:40/mi
1:21:57
↑ 67↓ 78
20K· 12.43 mi
8:49/mi
1:49:19
↑ 106↓ 860.1%
Half· 13.11 mi
8:55/mi
1:55:24
↑ 19↓ 370.5%
25K· 15.53 mi
9:13/mi
2:17:45
↑ 66↓ 880.2%
30K· 18.64 mi
9:29/mi
2:47:13
↑ 181↓ 1480.2%
20M
9:55/mi
3:00:41
↑ 64↓ 500.2%
21M
12:16/mi
3:12:57
↑ 106↓ 241.6%
35K· 21.75 mi
8:29/mi
3:19:18
↑ 17↓ 861.7%
23M
9:16/mi
3:30:54
↑ 23↓ 630.6%
24M
9:45/mi
3:40:39
↓ 821.3%
40K· 24.85 mi
10:16/mi
3:49:26
↓ 200.3%
25.2M
10:58/mi
3:53:13
↑ 13↓ 160.2%
Finish· 26.22 mi
8:38/mi
4:02:01
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:24
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time2:06:37
Pace9:40 /mi
📊Positive Split: 9.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:5427:498:5727:49
8:57
-
10K
6.21 mi12:20:0755:028:5127:13
8:46
-0:11
15K
9.32 mi12:47:021:21:578:4826:55
8:40
-0:06
20K
12.43 mi13:14:241:49:198:4827:22
8:49
+0:09
Half
13.11 mi13:20:291:55:248:486:05
8:55
+0:06
25K
15.53 mi13:42:502:17:458:5222:21
9:13
+0:18
30K
18.64 mi14:12:182:47:138:5829:28
9:29
+0:16
20M
20.00 mi14:25:463:00:419:0213:28
9:55
+0:26
21M
21.00 mi14:38:023:12:579:1112:16
12:16
+2:21
35K
21.75 mi14:44:233:19:189:106:21
8:29
-3:47
23M
23.00 mi14:55:593:30:549:1011:36
9:16
+0:47
24M
24.00 mi15:05:443:40:399:129:45
9:45
+0:29
40K
24.85 mi15:14:313:49:269:148:47
10:16
+0:31
25.2M
25.20 mi15:18:183:53:139:153:47
10:58
+0:42
Finish
26.22 mi15:27:064:02:019:148:48
8:38
-2:20

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

8:29 /mi

Average Pace

9:14 /mi

Slowest Pace

12:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

42:04

17% of race

Time at Steady Pace

2:31:54

63% of race

Time at Slower Pace

48:03

20% of race

Average Pace: 9:14 /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 mi11:52:5427:498:5727:49
8:57
#22223
10K
6.21 mi12:20:0755:028:5127:13
8:46
#21743
15K
9.32 mi12:47:021:21:578:4826:55
8:40
#21218
20K
12.43 mi13:14:241:49:198:4827:22
8:49
#20916
Half
13.11 mi13:20:291:55:248:486:05
8:55
#20944
25K
15.53 mi13:42:502:17:458:5222:21
9:13
#20941
30K
18.64 mi14:12:182:47:138:5829:28
9:29
#20730
20M
20.00 mi14:25:463:00:419:0213:28
9:55
#20722
21M
21.00 mi14:38:023:12:579:1112:16
12:16
#21070
35K
21.75 mi14:44:233:19:189:106:21
8:29
#20879
23M
23.00 mi14:55:593:30:549:1011:36
9:16
#20690
24M
24.00 mi15:05:443:40:399:129:45
9:45
#20699
40K
24.85 mi15:14:313:49:269:148:47
10:16
#20745
25.2M
25.20 mi15:18:183:53:139:153:47
10:58
#20738
Finish
26.22 mi15:27:064:02:019:148:48
8:38
#20637
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi222238751875120280(Top 71%)7586(Top 62%)7586(Top 139%)
10K6.21 mi3.10 mi21743+4808468+2838468+28321216(Top 75%)8150(Top 67%)8150(Top 149%)
15K9.32 mi3.11 mi21218+5258158+3108158+31020280(Top 71%)7586(Top 62%)7586(Top 139%)
20K12.43 mi3.11 mi20916+3027986+1727986+17219988(Top 70%)7473(Top 61%)7473(Top 137%)
Half13.11 mi0.68 mi20944-288002-168002-1621491(Top 76%)8302(Top 68%)8302(Top 152%)
25K15.53 mi2.42 mi20941+38007-58007-520849(Top 73%)8006(Top 65%)8006(Top 146%)
30K18.64 mi3.11 mi20730+2117946+617946+6119883(Top 70%)7598(Top 62%)7598(Top 139%)
20M20.00 mi1.36 mi20722+87954-87954-820648(Top 73%)8167(Top 67%)8167(Top 149%)
21M21.00 mi1.00 mi21070-3488163-2098163-20924042(Top 85%)10054(Top 82%)10054(Top 184%)
35K21.75 mi0.75 mi20879+1918073+908073+9015468(Top 54%)5524(Top 45%)5524(Top 101%)
23M23.00 mi1.25 mi20690+1897996+777996+7717653(Top 62%)6825(Top 56%)6825(Top 125%)
24M24.00 mi1.00 mi20699-98015-198015-1920580(Top 72%)8381(Top 69%)8381(Top 153%)
40K24.85 mi0.85 mi20745-468056-418056-4121307(Top 75%)8821(Top 72%)8821(Top 161%)
25.2M25.20 mi0.35 mi20738+78061-58061-520567(Top 72%)8445(Top 69%)8445(Top 154%)
Finish26.22 mi1.02 mi20637+1018019+428019+4217134(Top 60%)6639(Top 54%)6639(Top 121%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

20280

Females

7586

F18-39

7586

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

21216

Females

8150

F18-39

8150

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

20280

Females

7586

F18-39

7586

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

19988

Females

7473

F18-39

7473

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

21491

Females

8302

F18-39

8302

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

20849

Females

8006

F18-39

8006

25K→30K

15.5 - 18.6 mi

Top 70%
×9story building
+181ft-148ft

Overall

19883

Females

7598

F18-39

7598

30K→20M

18.6 - 20.0 mi

Top 73%
×5story building
+64ft-50ft

Overall

20648

Females

8167

F18-39

8167

20M→21M

20.0 - 21.0 mi

Top 85%
×8story building
+106ft-24ft

Overall

24042

Females

10054

F18-39

10054

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

15468

Females

5524

F18-39

5524

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

17653

Females

6825

F18-39

6825

23M→24M

23.0 - 24.0 mi

Top 72%
×6story building
+12ft-82ft

Overall

20580

Females

8381

F18-39

8381

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

21307

Females

8821

F18-39

8821

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

20567

Females

8445

F18-39

8445

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

17134

Females

6639

F18-39

6639

Passing Analysis

Category:
Athletes Passed
2742
Passed By
1156
Net Change
+1586
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22223
5K → 10K57393+480#22223#21743
10K → 15K56742+525#21743#21218
15K → 20K35351+302#21218#20916
20K → Half2250-28#20916#20944
Half → 25K147144+3#20944#20941
25K → 30K320109+211#20941#20730
30K → 20M10698+8#20730#20722
20M → 21M23371-348#20722#21070
21M → 35K1921+191#21070#20879
35K → 23M20516+189#20879#20690
23M → 24M5261-9#20690#20699
24M → 40K4490-46#20699#20745
40K → 25.2M2922+7#20745#20738
25.2M → Finish1098+101#20738#20637
TOTALS27421156+1586
📊

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