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BOSTON MARATHON 2025

Erin Shea

Bib: 16004•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

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
26:49
Rank: #20662
Start → 5K
26:49 | 8:38/mi
10K· 6.21 mi
54:14
Rank: #21047 (-385)
5K → 10K
27:25 | 8:49/mi
15K· 9.32 mi
1:22:30
Rank: #21541 (-494)
10K → 15K
28:16 | 9:06/mi
20K· 12.43 mi
1:50:50
Rank: #21550 (-9)
15K → 20K
28:20 | 9:07/mi
Half· 13.11 mi
1:56:58
Rank: #21567 (-17)
20K → Half
6:08 | 8:59/mi
25K· 15.53 mi
2:19:15
Rank: #21402 (+165)
Half → 25K
22:17 | 9:11/mi
30K· 18.64 mi
2:48:11
Rank: #20976 (+426)
25K → 30K
28:56 | 9:19/mi
20M
3:01:32
Rank: #20926 (+50)
30K → 20M
13:21 | 9:49/mi
21M
3:11:51
Rank: #20810 (+116)
20M → 21M
10:19 | 10:19/mi
35K· 21.75 mi
3:18:54
Rank: #20780 (+30)
21M → 35K
7:03 | 9:25/mi
23M
3:30:45
Rank: #20658 (+122)
35K → 23M
11:51 | 9:28/mi
24M
3:40:00
Rank: #20577 (+81)
23M → 24M
9:15 | 9:15/mi
40K· 24.85 mi
3:47:41
Rank: #20455 (+122)
24M → 40K
7:41 | 8:59/mi
25.2M
3:50:51
Rank: #20363 (+92)
40K → 25.2M
3:10 | 9:11/mi
Finish· 26.22 mi
3:58:53
Rank: #20133 (+230)
25.2M → Finish
8:02 | 7:53/mi

Course Map & Elevation

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:58
Pace8:55 /mi
2nd Half
Distance13.11 mi
Time2:01:55
Pace9:18 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:4726:498:3826:49
8:38
-
10K
6.21 mi11:22:1254:148:4427:25
8:49
+0:11
15K
9.32 mi11:50:281:22:308:5128:16
9:06
+0:17
20K
12.43 mi12:18:481:50:508:5528:20
9:07
+0:01
Half
13.11 mi12:24:561:56:588:556:08
8:59
-0:08
25K
15.53 mi12:47:132:19:158:5822:17
9:11
+0:12
30K
18.64 mi13:16:092:48:119:0128:56
9:19
+0:08
20M
20.00 mi13:29:303:01:329:0513:21
9:49
+0:30
21M
21.00 mi13:39:493:11:519:0810:19
10:19
+0:30
35K
21.75 mi13:46:523:18:549:097:03
9:25
-0:54
23M
23.00 mi13:58:433:30:459:1011:51
9:28
+0:03
24M
24.00 mi14:07:583:40:009:109:15
9:15
-0:13
40K
24.85 mi14:15:393:47:419:107:41
8:59
-0:16
25.2M
25.20 mi14:18:493:50:519:103:10
9:11
+0:12
Finish
26.22 mi14:26:513:58:539:078:02
7:53
-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

7:53 /mi

Average Pace

9:07 /mi

Slowest Pace

10:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

1:02:16

26% of race

Time at Steady Pace

2:21:06

59% of race

Time at Slower Pace

35:31

15% of race

Average Pace: 9:07 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:54:4726:498:3826:49
8:38
#20662
10K
6.21 mi11:22:1254:148:4427:25
8:49
#21047
15K
9.32 mi11:50:281:22:308:5128:16
9:06
#21541
20K
12.43 mi12:18:481:50:508:5528:20
9:07
#21550
Half
13.11 mi12:24:561:56:588:556:08
8:59
#21567
25K
15.53 mi12:47:132:19:158:5822:17
9:11
#21402
30K
18.64 mi13:16:092:48:119:0128:56
9:19
#20976
20M
20.00 mi13:29:303:01:329:0513:21
9:49
#20926
21M
21.00 mi13:39:493:11:519:0810:19
10:19
#20810
35K
21.75 mi13:46:523:18:549:097:03
9:25
#20780
23M
23.00 mi13:58:433:30:459:1011:51
9:28
#20658
24M
24.00 mi14:07:583:40:009:109:15
9:15
#20577
40K
24.85 mi14:15:393:47:419:107:41
8:59
#20455
25.2M
25.20 mi14:18:493:50:519:103:10
9:11
#20363
Finish
26.22 mi14:26:513:58:539:078:02
7:53
#20133
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi206627891789122452(Top 79%)8801(Top 72%)8801(Top 161%)
10K6.21 mi3.10 mi21047-3858079-1888079-18821527(Top 76%)8322(Top 68%)8322(Top 152%)
15K9.32 mi3.11 mi21541-4948332-2538332-25322452(Top 79%)8801(Top 72%)8801(Top 161%)
20K12.43 mi3.11 mi21550-98343-118343-1121552(Top 76%)8340(Top 68%)8340(Top 152%)
Half13.11 mi0.68 mi21567-178358-158358-1521788(Top 77%)8460(Top 69%)8460(Top 155%)
25K15.53 mi2.42 mi21402+1658271+878271+8720725(Top 73%)7935(Top 65%)7935(Top 145%)
30K18.64 mi3.11 mi20976+4268078+1938078+19319181(Top 68%)7219(Top 59%)7219(Top 132%)
20M20.00 mi1.36 mi20926+508053+258053+2520376(Top 72%)8004(Top 65%)8004(Top 146%)
21M21.00 mi1.00 mi20810+1168015+388015+3819442(Top 68%)7583(Top 62%)7583(Top 139%)
35K21.75 mi0.75 mi20780+308022-78022-720063(Top 71%)8013(Top 66%)8013(Top 147%)
23M23.00 mi1.25 mi20658+1227973+497973+4918547(Top 65%)7263(Top 59%)7263(Top 133%)
24M24.00 mi1.00 mi20577+817949+247949+2418608(Top 66%)7349(Top 60%)7349(Top 134%)
40K24.85 mi0.85 mi20455+1227896+537896+5316272(Top 57%)6204(Top 51%)6204(Top 113%)
25.2M25.20 mi0.35 mi20363+927855+417855+4112952(Top 46%)4510(Top 37%)4510(Top 82%)
Finish26.22 mi1.02 mi20133+2307748+1077748+10712111(Top 43%)3999(Top 33%)3999(Top 73%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21stories
+97ft-345ft

Overall

22452

Females

8801

F18-39

8801

5K→10K

3.1 - 6.2 mi

Top 76%
×5stories
+79ft-138ft

Overall

21527

Females

8322

F18-39

8322

10K→15K

6.2 - 9.3 mi

Top 79%
×3stories
+67ft-78ft

Overall

22452

Females

8801

F18-39

8801

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

21552

Females

8340

F18-39

8340

20K→Half

12.4 - 13.1 mi

Top 77%
×2stories
+19ft-37ft

Overall

21788

Females

8460

F18-39

8460

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

20725

Females

7935

F18-39

7935

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

19181

Females

7219

F18-39

7219

30K→20M

18.6 - 20.0 mi

Top 72%
×5stories
+64ft-50ft

Overall

20376

Females

8004

F18-39

8004

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

19442

Females

7583

F18-39

7583

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

20063

Females

8013

F18-39

8013

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

18547

Females

7263

F18-39

7263

23M→24M

23.0 - 24.0 mi

Top 66%
×6stories
+12ft-82ft

Overall

18608

Females

7349

F18-39

7349

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16272

Females

6204

F18-39

6204

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12952

Females

4510

F18-39

4510

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2stories
+22ft-21ft

Overall

12111

Females

3999

F18-39

3999

Passing Analysis

Category:
Athletes Passed
2169
Passed By
1640
Net Change
+529
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20662
5K → 10K124509-385#20662#21047
10K → 15K83577-494#21047#21541
15K → 20K196205-9#21541#21550
20K → Half3350-17#21550#21567
Half → 25K22762+165#21567#21402
25K → 30K44822+426#21402#20976
30K → 20M12676+50#20976#20926
20M → 21M15337+116#20926#20810
21M → 35K6535+30#20810#20780
35K → 23M15432+122#20780#20658
23M → 24M10322+81#20658#20577
24M → 40K13210+122#20577#20455
40K → 25.2M942+92#20455#20363
25.2M → Finish2311+230#20363#20133
TOTALS21691640+529
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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