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BOSTON MARATHON 2025

Bridget O'Brien

Bib: 17382•F

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0:00
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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
8:28/mi
26:18
↑ 97↓ 3451.5%
10K· 6.21 mi
8:22/mi
52:17
↑ 79↓ 1380.4%
15K· 9.32 mi
8:15/mi
1:17:56
↑ 67↓ 78
20K· 12.43 mi
8:19/mi
1:43:47
↑ 106↓ 860.1%
Half· 13.11 mi
8:14/mi
1:49:24
↑ 19↓ 370.5%
25K· 15.53 mi
8:21/mi
2:09:39
↑ 66↓ 880.2%
30K· 18.64 mi
9:02/mi
2:37:43
↑ 181↓ 1480.2%
20M
8:34/mi
2:49:22
↑ 64↓ 500.2%
21M
8:32/mi
2:57:54
↑ 106↓ 241.6%
35K· 21.75 mi
8:01/mi
3:03:54
↑ 17↓ 861.7%
23M
8:09/mi
3:14:06
↑ 23↓ 630.6%
24M
7:52/mi
3:21:58
↓ 821.3%
40K· 24.85 mi
7:50/mi
3:28:40
↓ 200.3%
25.2M
8:16/mi
3:31:31
↑ 13↓ 160.2%
Finish· 26.22 mi
24:24/mi
3:56:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:24
Pace8:21 /mi
2nd Half
Distance13.11 mi
Time2:06:59
Pace9:41 /mi
📊Positive Split: 16.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5926:188:2826:18
8:28
-
10K
6.21 mi11:43:5852:178:2525:59
8:22
-0:06
15K
9.32 mi12:09:371:17:568:2225:39
8:15
-0:07
20K
12.43 mi12:35:281:43:478:2125:51
8:19
+0:04
Half
13.11 mi12:41:051:49:248:215:37
8:14
-0:05
25K
15.53 mi13:01:202:09:398:2120:15
8:21
+0:07
30K
18.64 mi13:29:242:37:438:2828:04
9:02
+0:41
20M
20.00 mi13:41:032:49:228:2811:39
8:34
-0:28
21M
21.00 mi13:49:352:57:548:288:32
8:32
-0:02
35K
21.75 mi13:55:353:03:548:276:00
8:01
-0:31
23M
23.00 mi14:05:473:14:068:2610:12
8:09
+0:08
24M
24.00 mi14:13:393:21:588:257:52
7:52
-0:17
40K
24.85 mi14:20:213:28:408:246:42
7:50
-0:02
25.2M
25.20 mi14:23:123:31:318:242:51
8:16
+0:26
Finish
26.22 mi14:48:043:56:239:0124:52
24:24
+16:08

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

7:50 /mi

Average Pace

9:01 /mi

Slowest Pace

24:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:31:31

89% of race

Time at Slower Pace

24:52

11% of race

Average Pace: 9:01 /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 mi11:17:5926:188:2826:18
8:28
#19692
10K
6.21 mi11:43:5852:178:2525:59
8:22
#19330
15K
9.32 mi12:09:371:17:568:2225:39
8:15
#18802
20K
12.43 mi12:35:281:43:478:2125:51
8:19
#18325
Half
13.11 mi12:41:051:49:248:215:37
8:14
#18274
25K
15.53 mi13:01:202:09:398:2120:15
8:21
#17908
30K
18.64 mi13:29:242:37:438:2828:04
9:02
#17849
20M
20.00 mi13:41:032:49:228:2811:39
8:34
#17573
21M
21.00 mi13:49:352:57:548:288:32
8:32
#17172
35K
21.75 mi13:55:353:03:548:276:00
8:01
#16985
23M
23.00 mi14:05:473:14:068:2610:12
8:09
#16614
24M
24.00 mi14:13:393:21:588:257:52
7:52
#16303
40K
24.85 mi14:20:213:28:408:246:42
7:50
#16051
25.2M
25.20 mi14:23:123:31:318:242:51
8:16
#15901
Finish
26.22 mi14:48:043:56:239:0124:52
24:24
#19635
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi196927322732217789(Top 63%)6199(Top 51%)6199(Top 113%)
10K6.21 mi3.10 mi19330+3627084+2387084+23818972(Top 67%)6870(Top 56%)6870(Top 126%)
15K9.32 mi3.11 mi18802+5286789+2956789+29517789(Top 63%)6199(Top 51%)6199(Top 113%)
20K12.43 mi3.11 mi18325+4776527+2626527+26217069(Top 60%)5815(Top 48%)5815(Top 106%)
Half13.11 mi0.68 mi18274+516502+256502+2517576(Top 62%)6102(Top 50%)6102(Top 112%)
25K15.53 mi2.42 mi17908+3666300+2026300+20216271(Top 57%)5470(Top 45%)5470(Top 100%)
30K18.64 mi3.11 mi17849+596317-176317-1717866(Top 63%)6515(Top 53%)6515(Top 119%)
20M20.00 mi1.36 mi17573+2766189+1286189+12814306(Top 50%)4680(Top 38%)4680(Top 86%)
21M21.00 mi1.00 mi17172+4015978+2115978+21110738(Top 38%)2986(Top 24%)2986(Top 55%)
35K21.75 mi0.75 mi16985+1875889+895889+8912466(Top 44%)3901(Top 32%)3901(Top 71%)
23M23.00 mi1.25 mi16614+3715705+1845705+18411074(Top 39%)3276(Top 27%)3276(Top 60%)
24M24.00 mi1.00 mi16303+3115551+1545551+15410382(Top 37%)3004(Top 25%)3004(Top 55%)
40K24.85 mi0.85 mi16051+2525436+1155436+1159106(Top 32%)2527(Top 21%)2527(Top 46%)
25.2M25.20 mi0.35 mi15901+1505365+715365+717571(Top 27%)1911(Top 16%)1911(Top 35%)
Finish26.22 mi1.02 mi19635-37347482-21177482-211728399(Top 100%)12226(Top 100%)12226(Top 224%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

17789

Females

6199

F18-39

6199

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

18972

Females

6870

F18-39

6870

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

17789

Females

6199

F18-39

6199

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

17069

Females

5815

F18-39

5815

20K→Half

12.4 - 13.1 mi

Top 62%
×2story building
+19ft-37ft

Overall

17576

Females

6102

F18-39

6102

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16271

Females

5470

F18-39

5470

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

17866

Females

6515

F18-39

6515

30K→20M

18.6 - 20.0 mi

Top 50%
×5story building
+64ft-50ft

Overall

14306

Females

4680

F18-39

4680

20M→21M

20.0 - 21.0 mi

Top 38%
×8story building
+106ft-24ft

Overall

10738

Females

2986

F18-39

2986

21M→35K

21.0 - 21.8 mi

Top 44%
×7story building
+17ft-86ft

Overall

12466

Females

3901

F18-39

3901

35K→23M

21.8 - 23.0 mi

Top 39%
×5story building
+23ft-63ft

Overall

11074

Females

3276

F18-39

3276

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

10382

Females

3004

F18-39

3004

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

9106

Females

2527

F18-39

2527

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7571

Females

1911

F18-39

1911

25.2M→Finish

25.2 - 26.2 mi

Top 100%
×2story building
+22ft-21ft

Overall

28399

Females

12226

F18-39

12226

Passing Analysis

Category:
Athletes Passed
4228
Passed By
4171
Net Change
+57
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19692
5K → 10K484122+362#19692#19330
10K → 15K56537+528#19330#18802
15K → 20K50326+477#18802#18325
20K → Half6514+51#18325#18274
Half → 25K38418+366#18274#17908
25K → 30K262203+59#17908#17849
30K → 20M2815+276#17849#17573
20M → 21M4043+401#17573#17172
21M → 35K1914+187#17172#16985
35K → 23M3732+371#16985#16614
23M → 24M3132+311#16614#16303
24M → 40K2520+252#16303#16051
40K → 25.2M1511+150#16051#15901
25.2M → Finish03734-3734#15901#19635
TOTALS42284171+57
📊

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