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BOSTON MARATHON 2025

Eileen Sien

Bib: 27076•F

MD

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
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
10:50/mi
33:38
↑ 97↓ 3451.5%
10K· 6.21 mi
12:05/mi
1:11:12
↑ 79↓ 1380.4%
15K· 9.32 mi
11:22/mi
1:46:32
↑ 67↓ 78
20K· 12.43 mi
14:05/mi
2:30:18
↑ 106↓ 860.1%
Half· 13.11 mi
12:38/mi
2:38:55
↑ 19↓ 370.5%
25K· 15.53 mi
14:39/mi
3:14:26
↑ 66↓ 880.2%
30K· 18.64 mi
13:52/mi
3:57:31
↑ 181↓ 1480.2%
20M
13:49/mi
4:16:18
↑ 64↓ 500.2%
21M
15:31/mi
4:31:49
↑ 106↓ 241.6%
35K· 21.75 mi
13:22/mi
4:41:49
↑ 17↓ 861.7%
23M
16:57/mi
5:03:02
↑ 23↓ 630.6%
24M
12:49/mi
5:15:51
↓ 821.3%
40K· 24.85 mi
13:08/mi
5:27:05
↓ 200.3%
25.2M
12:28/mi
5:31:23
↑ 13↓ 160.2%
Finish· 26.22 mi
11:28/mi
5:43:04
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:38:55
Pace12:07 /mi
2nd Half
Distance13.11 mi
Time3:04:09
Pace14:03 /mi
📊Positive Split: 15.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:3233:3810:5033:38
10:50
-
10K
6.21 mi12:27:061:11:1211:2837:34
12:05
+1:15
15K
9.32 mi13:02:261:46:3211:2635:20
11:22
-0:43
20K
12.43 mi13:46:122:30:1812:0643:46
14:05
+2:43
Half
13.11 mi13:54:492:38:5512:078:37
12:38
-1:27
25K
15.53 mi14:30:203:14:2612:3135:31
14:39
+2:01
30K
18.64 mi15:13:253:57:3112:4443:05
13:52
-0:47
20M
20.00 mi15:32:124:16:1812:4918:47
13:49
-0:03
21M
21.00 mi15:47:434:31:4912:5715:31
15:31
+1:42
35K
21.75 mi15:57:434:41:4912:5710:00
13:22
-2:09
23M
23.00 mi16:18:565:03:0213:1121:13
16:57
+3:35
24M
24.00 mi16:31:455:15:5113:1012:49
12:49
-4:08
40K
24.85 mi16:42:595:27:0513:1011:14
13:08
+0:19
25.2M
25.20 mi16:47:175:31:2313:094:18
12:28
-0:40
Finish
26.22 mi16:58:585:43:0413:0611:41
11:28
-1:00

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

10:50 /mi

Average Pace

13:06 /mi

Slowest Pace

16:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:13

34% of race

Time at Steady Pace

1:48:50

32% of race

Time at Slower Pace

1:56:01

34% of race

Average Pace: 13:05 /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 mi11:49:3233:3810:5033:38
10:50
#27322
10K
6.21 mi12:27:061:11:1211:2837:34
12:05
#27787
15K
9.32 mi13:02:261:46:3211:2635:20
11:22
#27563
20K
12.43 mi13:46:122:30:1812:0643:46
14:05
#27885
Half
13.11 mi13:54:492:38:5512:078:37
12:38
#27895
25K
15.53 mi14:30:203:14:2612:3135:31
14:39
#27956
30K
18.64 mi15:13:253:57:3112:4443:05
13:52
#27899
20M
20.00 mi15:32:124:16:1812:4918:47
13:49
#27867
21M
21.00 mi15:47:434:31:4912:5715:31
15:31
#27870
35K
21.75 mi15:57:434:41:4912:5710:00
13:22
#27857
23M
23.00 mi16:18:565:03:0213:1121:13
16:57
#27961
24M
24.00 mi16:31:455:15:5113:1012:49
12:49
#27927
40K
24.85 mi16:42:595:27:0513:1011:14
13:08
#27883
25.2M
25.20 mi16:47:175:31:2313:094:18
12:28
#27856
Finish
26.22 mi16:58:585:43:0413:0611:41
11:28
#27810
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi27322115191151927113(Top 95%)11445(Top 94%)11445(Top 878%)
10K6.21 mi3.10 mi27787-46511817-29811817-29827985(Top 99%)11963(Top 98%)11963(Top 918%)
15K9.32 mi3.11 mi27563+22411696+12111696+12127113(Top 95%)11445(Top 94%)11445(Top 878%)
20K12.43 mi3.11 mi27885-32211898-20211898-20228262(Top 100%)12160(Top 99%)12160(Top 933%)
Half13.11 mi0.68 mi27895-1011910-1211910-1227824(Top 98%)11903(Top 97%)11903(Top 914%)
25K15.53 mi2.42 mi27956-6111952-4211952-4228147(Top 99%)12099(Top 99%)12099(Top 929%)
30K18.64 mi3.11 mi27899+5711923+2911923+2927406(Top 96%)11722(Top 96%)11722(Top 900%)
20M20.00 mi1.36 mi27867+3211915+811915+827153(Top 96%)11638(Top 95%)11638(Top 893%)
21M21.00 mi1.00 mi27870-311924-911924-927542(Top 97%)11837(Top 97%)11837(Top 908%)
35K21.75 mi0.75 mi27857+1311922+211922+227262(Top 96%)11724(Top 96%)11724(Top 900%)
23M23.00 mi1.25 mi27961-10411982-6011982-6028271(Top 100%)12188(Top 100%)12188(Top 935%)
24M24.00 mi1.00 mi27927+3411971+1111971+1126644(Top 94%)11445(Top 94%)11445(Top 878%)
40K24.85 mi0.85 mi27883+4411949+2211949+2226416(Top 93%)11342(Top 93%)11342(Top 870%)
25.2M25.20 mi0.35 mi27856+2711940+911940+924106(Top 85%)10234(Top 84%)10234(Top 785%)
Finish26.22 mi1.02 mi27810+4611920+2011920+2026082(Top 92%)11191(Top 92%)11191(Top 859%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 95%
×21story building
+97ft-345ft

Overall

27113

Females

11445

F50-54

11445

5K→10K

3.1 - 6.2 mi

Top 99%
×5story building
+79ft-138ft

Overall

27985

Females

11963

F50-54

11963

10K→15K

6.2 - 9.3 mi

Top 95%
×3story building
+67ft-78ft

Overall

27113

Females

11445

F50-54

11445

15K→20K

9.3 - 12.4 mi

Top 100%
×5story building
+106ft-86ft

Overall

28262

Females

12160

F50-54

12160

20K→Half

12.4 - 13.1 mi

Top 98%
×2story building
+19ft-37ft

Overall

27824

Females

11903

F50-54

11903

Half→25K

13.1 - 15.5 mi

Top 99%
×4story building
+66ft-88ft

Overall

28147

Females

12099

F50-54

12099

25K→30K

15.5 - 18.6 mi

Top 96%
×9story building
+181ft-148ft

Overall

27406

Females

11722

F50-54

11722

30K→20M

18.6 - 20.0 mi

Top 96%
×5story building
+64ft-50ft

Overall

27153

Females

11638

F50-54

11638

20M→21M

20.0 - 21.0 mi

Top 97%
×8story building
+106ft-24ft

Overall

27542

Females

11837

F50-54

11837

21M→35K

21.0 - 21.8 mi

Top 96%
×7story building
+17ft-86ft

Overall

27262

Females

11724

F50-54

11724

35K→23M

21.8 - 23.0 mi

Top 100%
×5story building
+23ft-63ft

Overall

28271

Females

12188

F50-54

12188

23M→24M

23.0 - 24.0 mi

Top 94%
×6story building
+12ft-82ft

Overall

26644

Females

11445

F50-54

11445

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

26416

Females

11342

F50-54

11342

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

24106

Females

10234

F50-54

10234

25.2M→Finish

25.2 - 26.2 mi

Top 92%
×2story building
+22ft-21ft

Overall

26082

Females

11191

F50-54

11191

Passing Analysis

Category:
Athletes Passed
596
Passed By
1084
Net Change
-488
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27322
5K → 10K15480-465#27322#27787
10K → 15K2317+224#27787#27563
15K → 20K7329-322#27563#27885
20K → Half717-10#27885#27895
Half → 25K2081-61#27895#27956
25K → 30K7619+57#27956#27899
30K → 20M386+32#27899#27867
20M → 21M1619-3#27867#27870
21M → 35K218+13#27870#27857
35K → 23M4108-104#27857#27961
23M → 24M384+34#27961#27927
24M → 40K473+44#27927#27883
40K → 25.2M270+27#27883#27856
25.2M → Finish493+46#27856#27810
TOTALS5961084-488
📊

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