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BOSTON MARATHON 2025

Stacey Clark

Bib: 23134•F

UT

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

Start
0:00:00
Race begins
5K· 3.11 mi
25:47
Rank: #18722
Start → 5K
25:47 | 8:18/mi
10K· 6.21 mi
51:55
Rank: #18965 (-243)
5K → 10K
26:08 | 8:25/mi
15K· 9.32 mi
1:18:40
Rank: #19299 (-334)
10K → 15K
26:45 | 8:37/mi
20K· 12.43 mi
1:47:26
Rank: #20112 (-813)
15K → 20K
28:46 | 9:16/mi
Half· 13.11 mi
1:53:24
Rank: #20116 (-4)
20K → Half
5:58 | 8:45/mi
25K· 15.53 mi
2:14:49
Rank: #19936 (+180)
Half → 25K
21:25 | 8:50/mi
30K· 18.64 mi
2:44:40
Rank: #20059 (-123)
25K → 30K
29:51 | 9:36/mi
20M
2:58:02
Rank: #20094 (-35)
30K → 20M
13:22 | 9:50/mi
21M
3:08:19
Rank: #20026 (+68)
20M → 21M
10:17 | 10:17/mi
35K· 21.75 mi
3:15:18
Rank: #20022 (+4)
21M → 35K
6:59 | 9:20/mi
23M
3:27:48
Rank: #20092 (-70)
35K → 23M
12:30 | 9:59/mi
24M
3:37:30
Rank: #20110 (-18)
23M → 24M
9:42 | 9:42/mi
40K· 24.85 mi
3:46:24
Rank: #20214 (-104)
24M → 40K
8:54 | 10:25/mi
25.2M
3:50:04
Rank: #20218 (-4)
40K → 25.2M
3:40 | 10:38/mi
Finish· 26.22 mi
3:59:33
Rank: #20267 (-49)
25.2M → Finish
9:29 | 9:18/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:24
Pace8:39 /mi
2nd Half
Distance13.11 mi
Time2:06:09
Pace9:37 /mi
📊Positive Split: 11.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:5425:478:1825:47
8:18
-
10K
6.21 mi11:48:0251:558:2126:08
8:25
+0:07
15K
9.32 mi12:14:471:18:408:2626:45
8:37
+0:12
20K
12.43 mi12:43:331:47:268:3928:46
9:16
+0:39
Half
13.11 mi12:49:311:53:248:395:58
8:45
-0:31
25K
15.53 mi13:10:562:14:498:4121:25
8:50
+0:05
30K
18.64 mi13:40:472:44:408:5029:51
9:36
+0:46
20M
20.00 mi13:54:092:58:028:5413:22
9:50
+0:14
21M
21.00 mi14:04:263:08:198:5810:17
10:17
+0:27
35K
21.75 mi14:11:253:15:188:596:59
9:20
-0:57
23M
23.00 mi14:23:553:27:489:0212:30
9:59
+0:39
24M
24.00 mi14:33:373:37:309:049:42
9:42
-0:17
40K
24.85 mi14:42:313:46:249:078:54
10:25
+0:43
25.2M
25.20 mi14:46:113:50:049:083:40
10:38
+0:13
Finish
26.22 mi14:55:403:59:339:099:29
9:18
-1:20

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

8:18 /mi

Average Pace

9:09 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:03

44% of race

Time at Steady Pace

1:15:05

31% of race

Time at Slower Pace

58:25

24% of race

Average Pace: 9:08 /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 mi11:21:5425:478:1825:47
8:18
#18722
10K
6.21 mi11:48:0251:558:2126:08
8:25
#18965
15K
9.32 mi12:14:471:18:408:2626:45
8:37
#19299
20K
12.43 mi12:43:331:47:268:3928:46
9:16
#20112
Half
13.11 mi12:49:311:53:248:395:58
8:45
#20116
25K
15.53 mi13:10:562:14:498:4121:25
8:50
#19936
30K
18.64 mi13:40:472:44:408:5029:51
9:36
#20059
20M
20.00 mi13:54:092:58:028:5413:22
9:50
#20094
21M
21.00 mi14:04:263:08:198:5810:17
10:17
#20026
35K
21.75 mi14:11:253:15:188:596:59
9:20
#20022
23M
23.00 mi14:23:553:27:489:0212:30
9:59
#20092
24M
24.00 mi14:33:373:37:309:049:42
9:42
#20110
40K
24.85 mi14:42:313:46:249:078:54
10:25
#20214
25.2M
25.20 mi14:46:113:50:049:083:40
10:38
#20218
Finish
26.22 mi14:55:403:59:339:099:29
9:18
#20267
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi187226755675519993(Top 70%)7438(Top 61%)7438(Top 571%)
10K6.21 mi3.10 mi18965-2436886-1316886-13119278(Top 68%)7045(Top 58%)7045(Top 541%)
15K9.32 mi3.11 mi19299-3347058-1727058-17219993(Top 70%)7438(Top 61%)7438(Top 571%)
20K12.43 mi3.11 mi20112-8137530-4727530-47222128(Top 78%)8653(Top 71%)8653(Top 664%)
Half13.11 mi0.68 mi20116-47542-127542-1220670(Top 73%)7855(Top 64%)7855(Top 603%)
25K15.53 mi2.42 mi19936+1807445+977445+9719126(Top 67%)7046(Top 58%)7046(Top 541%)
30K18.64 mi3.11 mi20059-1237556-1117556-11120380(Top 72%)7866(Top 64%)7866(Top 604%)
20M20.00 mi1.36 mi20094-357603-477603-4720416(Top 72%)8028(Top 66%)8028(Top 616%)
21M21.00 mi1.00 mi20026+687587+167587+1619320(Top 68%)7507(Top 61%)7507(Top 576%)
35K21.75 mi0.75 mi20022+47605-187605-1819733(Top 69%)7841(Top 64%)7841(Top 602%)
23M23.00 mi1.25 mi20092-707677-727677-7220442(Top 72%)8263(Top 68%)8263(Top 634%)
24M24.00 mi1.00 mi20110-187698-217698-2120391(Top 72%)8283(Top 68%)8283(Top 636%)
40K24.85 mi0.85 mi20214-1047778-807778-8021672(Top 76%)9022(Top 74%)9022(Top 692%)
25.2M25.20 mi0.35 mi20218-47779-17779-119531(Top 69%)7918(Top 65%)7918(Top 608%)
Finish26.22 mi1.02 mi20267-497819-407819-4020418(Top 72%)8350(Top 68%)8350(Top 641%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

19993

Females

7438

F50-54

7438

5K→10K

3.1 - 6.2 mi

Top 68%
×5stories
+79ft-138ft

Overall

19278

Females

7045

F50-54

7045

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

19993

Females

7438

F50-54

7438

15K→20K

9.3 - 12.4 mi

Top 78%
×5stories
+106ft-86ft

Overall

22128

Females

8653

F50-54

8653

20K→Half

12.4 - 13.1 mi

Top 73%
×2stories
+19ft-37ft

Overall

20670

Females

7855

F50-54

7855

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

19126

Females

7046

F50-54

7046

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

20380

Females

7866

F50-54

7866

30K→20M

18.6 - 20.0 mi

Top 72%
×5stories
+64ft-50ft

Overall

20416

Females

8028

F50-54

8028

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

19320

Females

7507

F50-54

7507

21M→35K

21.0 - 21.8 mi

Top 69%
×7stories
+17ft-86ft

Overall

19733

Females

7841

F50-54

7841

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

20442

Females

8263

F50-54

8263

23M→24M

23.0 - 24.0 mi

Top 72%
×6stories
+12ft-82ft

Overall

20391

Females

8283

F50-54

8283

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21672

Females

9022

F50-54

9022

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

19531

Females

7918

F50-54

7918

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2stories
+22ft-21ft

Overall

20418

Females

8350

F50-54

8350

Passing Analysis

Category:
Athletes Passed
1274
Passed By
2819
Net Change
-1545
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18722
5K → 10K171414-243#18722#18965
10K → 15K101435-334#18965#19299
15K → 20K46859-813#19299#20112
20K → Half2933-4#20112#20116
Half → 25K24262+180#20116#19936
25K → 30K184307-123#19936#20059
30K → 20M91126-35#20059#20094
20M → 21M12456+68#20094#20026
21M → 35K5248+4#20026#20022
35K → 23M66136-70#20022#20092
23M → 24M5674-18#20092#20110
24M → 40K33137-104#20110#20214
40K → 25.2M3337-4#20214#20218
25.2M → Finish4695-49#20218#20267
TOTALS12742819-1545
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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