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BOSTON MARATHON 2025

Kerri Maciejko

Bib: 31233•F

CT

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

Start
0:00:00
Race begins
5K· 3.11 mi
32:46
Rank: #26859
Start → 5K
32:46 | 10:33/mi
10K· 6.21 mi
1:06:12
Rank: #26774 (+85)
5K → 10K
33:26 | 10:46/mi
15K· 9.32 mi
1:39:53
Rank: #26656 (+118)
10K → 15K
33:41 | 10:50/mi
20K· 12.43 mi
2:14:19
Rank: #26502 (+154)
15K → 20K
34:26 | 11:05/mi
Half· 13.11 mi
2:21:40
Rank: #26483 (+19)
20K → Half
7:21 | 10:46/mi
25K· 15.53 mi
2:50:06
Rank: #26426 (+57)
Half → 25K
28:26 | 11:44/mi
30K· 18.64 mi
3:29:14
Rank: #26424 (+2)
25K → 30K
39:08 | 12:36/mi
20M
3:49:55
Rank: #26633 (-209)
30K → 20M
20:41 | 15:13/mi
21M
4:04:59
Rank: #26698 (-65)
20M → 21M
15:04 | 15:04/mi
35K· 21.75 mi
4:14:42
Rank: #26726 (-28)
21M → 35K
9:43 | 12:59/mi
23M
4:31:45
Rank: #26760 (-34)
35K → 23M
17:03 | 13:37/mi
24M
4:44:20
Rank: #26748 (+12)
23M → 24M
12:35 | 12:35/mi
40K· 24.85 mi
4:55:05
Rank: #26732 (+16)
24M → 40K
10:45 | 12:35/mi
25.2M
5:00:41
Rank: #26759 (-27)
40K → 25.2M
5:36 | 16:14/mi
Finish· 26.22 mi
5:12:09
Rank: #26742 (+17)
25.2M → Finish
11:28 | 11:15/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:21:40
Pace10:48 /mi
2nd Half
Distance13.11 mi
Time2:50:29
Pace13:00 /mi
📊Positive Split: 20.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:58:4032:4610:3332:46
10:33
-
10K
6.21 mi12:32:061:06:1210:3933:26
10:46
+0:13
15K
9.32 mi13:05:471:39:5310:4333:41
10:50
+0:04
20K
12.43 mi13:40:132:14:1910:4834:26
11:05
+0:15
Half
13.11 mi13:47:342:21:4010:487:21
10:46
-0:19
25K
15.53 mi14:16:002:50:0610:5728:26
11:44
+0:58
30K
18.64 mi14:55:083:29:1411:1339:08
12:36
+0:52
20M
20.00 mi15:15:493:49:5511:3020:41
15:13
+2:37
21M
21.00 mi15:30:534:04:5911:4015:04
15:04
-0:09
35K
21.75 mi15:40:364:14:4211:439:43
12:59
-2:05
23M
23.00 mi15:57:394:31:4511:4917:03
13:37
+0:38
24M
24.00 mi16:10:144:44:2011:5112:35
12:35
-1:02
40K
24.85 mi16:20:594:55:0511:5210:45
12:35
0:00
25.2M
25.20 mi16:26:355:00:4111:565:36
16:14
+3:39
Finish
26.22 mi16:38:035:12:0911:5511:28
11:15
-4:59

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

10:33 /mi

Average Pace

11:55 /mi

Slowest Pace

16:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:33:08

49% of race

Time at Steady Pace

1:40:37

32% of race

Time at Slower Pace

58:24

19% of race

Average Pace: 11:54 /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 mi11:58:4032:4610:3332:46
10:33
#26859
10K
6.21 mi12:32:061:06:1210:3933:26
10:46
#26774
15K
9.32 mi13:05:471:39:5310:4333:41
10:50
#26656
20K
12.43 mi13:40:132:14:1910:4834:26
11:05
#26502
Half
13.11 mi13:47:342:21:4010:487:21
10:46
#26483
25K
15.53 mi14:16:002:50:0610:5728:26
11:44
#26426
30K
18.64 mi14:55:083:29:1411:1339:08
12:36
#26424
20M
20.00 mi15:15:493:49:5511:3020:41
15:13
#26633
21M
21.00 mi15:30:534:04:5911:4015:04
15:04
#26698
35K
21.75 mi15:40:364:14:4211:439:43
12:59
#26726
23M
23.00 mi15:57:394:31:4511:4917:03
13:37
#26760
24M
24.00 mi16:10:144:44:2011:5112:35
12:35
#26748
40K
24.85 mi16:20:594:55:0511:5210:45
12:35
#26732
25.2M
25.20 mi16:26:355:00:4111:565:36
16:14
#26759
Finish
26.22 mi16:38:035:12:0911:5511:28
11:15
#26742
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi26859112441124426469(Top 93%)11046(Top 90%)11046(Top 202%)
10K6.21 mi3.10 mi26774+8511210+3411210+3426705(Top 94%)11173(Top 91%)11173(Top 204%)
15K9.32 mi3.11 mi26656+11811144+6611144+6626469(Top 93%)11046(Top 90%)11046(Top 202%)
20K12.43 mi3.11 mi26502+15411070+7411070+7426123(Top 92%)10875(Top 89%)10875(Top 199%)
Half13.11 mi0.68 mi26483+1911058+1211058+1226199(Top 92%)10941(Top 89%)10941(Top 200%)
25K15.53 mi2.42 mi26426+5711032+2611032+2626127(Top 92%)10931(Top 89%)10931(Top 200%)
30K18.64 mi3.11 mi26424+211058-2611058-2626267(Top 92%)11107(Top 91%)11107(Top 203%)
20M20.00 mi1.36 mi26633-20911193-13511193-13527963(Top 98%)12033(Top 98%)12033(Top 220%)
21M21.00 mi1.00 mi26698-6511236-4311236-4327201(Top 96%)11674(Top 95%)11674(Top 213%)
35K21.75 mi0.75 mi26726-2811266-3011266-3026939(Top 95%)11559(Top 95%)11559(Top 211%)
23M23.00 mi1.25 mi26760-3411289-2311289-2326975(Top 95%)11590(Top 95%)11590(Top 212%)
24M24.00 mi1.00 mi26748+1211298-911298-926402(Top 93%)11320(Top 93%)11320(Top 207%)
40K24.85 mi0.85 mi26732+1611294+411294+425769(Top 91%)11027(Top 90%)11027(Top 202%)
25.2M25.20 mi0.35 mi26759-2711313-1911313-1927809(Top 98%)12027(Top 98%)12027(Top 220%)
Finish26.22 mi1.02 mi26742+1711308+511308+525791(Top 91%)11042(Top 90%)11042(Top 202%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 93%
×21stories
+97ft-345ft

Overall

26469

Females

11046

F18-39

11046

5K→10K

3.1 - 6.2 mi

Top 94%
×5stories
+79ft-138ft

Overall

26705

Females

11173

F18-39

11173

10K→15K

6.2 - 9.3 mi

Top 93%
×3stories
+67ft-78ft

Overall

26469

Females

11046

F18-39

11046

15K→20K

9.3 - 12.4 mi

Top 92%
×5stories
+106ft-86ft

Overall

26123

Females

10875

F18-39

10875

20K→Half

12.4 - 13.1 mi

Top 92%
×2stories
+19ft-37ft

Overall

26199

Females

10941

F18-39

10941

Half→25K

13.1 - 15.5 mi

Top 92%
×4stories
+66ft-88ft

Overall

26127

Females

10931

F18-39

10931

25K→30K

15.5 - 18.6 mi

Top 92%
×9stories
+181ft-148ft

Overall

26267

Females

11107

F18-39

11107

30K→20M

18.6 - 20.0 mi

Top 98%
×5stories
+64ft-50ft

Overall

27963

Females

12033

F18-39

12033

20M→21M

20.0 - 21.0 mi

Top 96%
×8stories
+106ft-24ft

Overall

27201

Females

11674

F18-39

11674

21M→35K

21.0 - 21.8 mi

Top 95%
×7stories
+17ft-86ft

Overall

26939

Females

11559

F18-39

11559

35K→23M

21.8 - 23.0 mi

Top 95%
×5stories
+23ft-63ft

Overall

26975

Females

11590

F18-39

11590

23M→24M

23.0 - 24.0 mi

Top 93%
×6stories
+12ft-82ft

Overall

26402

Females

11320

F18-39

11320

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

25769

Females

11027

F18-39

11027

40K→25.2M

24.9 - 25.2 mi

Top 98%
×1story
+13ft-16ft

Overall

27809

Females

12027

F18-39

12027

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2stories
+22ft-21ft

Overall

25791

Females

11042

F18-39

11042

Passing Analysis

Category:
Athletes Passed
979
Passed By
862
Net Change
+117
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26859
5K → 10K200115+85#26859#26774
10K → 15K17557+118#26774#26656
15K → 20K19844+154#26656#26502
20K → Half289+19#26502#26483
Half → 25K11356+57#26483#26426
25K → 30K107105+2#26426#26424
30K → 20M6215-209#26424#26633
20M → 21M2186-65#26633#26698
21M → 35K1644-28#26698#26726
35K → 23M2559-34#26726#26760
23M → 24M3725+12#26760#26748
24M → 40K2711+16#26748#26732
40K → 25.2M128-27#26732#26759
25.2M → Finish258+17#26759#26742
TOTALS979862+117
📊

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