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BOSTON MARATHON 2025

Kelsey Haczkewicz

Bib: 17619•F

SK

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 49%
Gender (Female)
#0 / 12228
Top 35%
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
23:54
Rank: #13934
Start → 5K
23:54 | 7:42/mi
10K· 6.21 mi
48:18
Rank: #14533 (-599)
5K → 10K
24:24 | 7:51/mi
15K· 9.32 mi
1:12:56
Rank: #14854 (-321)
10K → 15K
24:38 | 7:56/mi
20K· 12.43 mi
1:37:27
Rank: #14612 (+242)
15K → 20K
24:31 | 7:53/mi
Half· 13.11 mi
1:42:45
Rank: #14560 (+52)
20K → Half
5:18 | 7:46/mi
25K· 15.53 mi
2:02:16
Rank: #14480 (+80)
Half → 25K
19:31 | 8:03/mi
30K· 18.64 mi
2:28:03
Rank: #14213 (+267)
25K → 30K
25:47 | 8:18/mi
20M
2:39:38
Rank: #14170 (+43)
30K → 20M
11:35 | 8:31/mi
21M
2:48:46
Rank: #14155 (+15)
20M → 21M
9:08 | 9:08/mi
35K· 21.75 mi
2:55:06
Rank: #14211 (-56)
21M → 35K
6:20 | 8:28/mi
23M
3:06:12
Rank: #14309 (-98)
35K → 23M
11:06 | 8:52/mi
24M
3:14:48
Rank: #14316 (-7)
23M → 24M
8:36 | 8:36/mi
40K· 24.85 mi
3:21:54
Rank: #14214 (+102)
24M → 40K
7:06 | 8:18/mi
25.2M
3:24:58
Rank: #14153 (+61)
40K → 25.2M
3:04 | 8:54/mi
Finish· 26.22 mi
3:32:47
Rank: #13965 (+188)
25.2M → Finish
7:49 | 7:40/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:45
Pace7:50 /mi
2nd Half
Distance13.11 mi
Time1:50:02
Pace8:24 /mi
📊Positive Split: 7.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:3623:547:4223:54
7:42
-
10K
6.21 mi11:39:0048:187:4624:24
7:51
+0:09
15K
9.32 mi12:03:381:12:567:4924:38
7:56
+0:05
20K
12.43 mi12:28:091:37:277:5024:31
7:53
-0:03
Half
13.11 mi12:33:271:42:457:505:18
7:46
-0:07
25K
15.53 mi12:52:582:02:167:5219:31
8:03
+0:17
30K
18.64 mi13:18:452:28:037:5725:47
8:18
+0:15
20M
20.00 mi13:30:202:39:387:5911:35
8:31
+0:13
21M
21.00 mi13:39:282:48:468:029:08
9:08
+0:37
35K
21.75 mi13:45:482:55:068:036:20
8:28
-0:40
23M
23.00 mi13:56:543:06:128:0611:06
8:52
+0:24
24M
24.00 mi14:05:303:14:488:078:36
8:36
-0:16
40K
24.85 mi14:12:363:21:548:077:06
8:18
-0:18
25.2M
25.20 mi14:15:403:24:588:083:04
8:54
+0:36
Finish
26.22 mi14:23:293:32:478:077:49
7:40
-1:14

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

7:40 /mi

Average Pace

8:07 /mi

Slowest Pace

9:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:58

77% of race

Time at Steady Pace

40:41

19% of race

Time at Slower Pace

9:08

4% of race

Average Pace: 8:07 /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

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:14:3623:547:4223:54
7:42
#13934
10K
6.21 mi11:39:0048:187:4624:24
7:51
#14533
15K
9.32 mi12:03:381:12:567:4924:38
7:56
#14854
20K
12.43 mi12:28:091:37:277:5024:31
7:53
#14612
Half
13.11 mi12:33:271:42:457:505:18
7:46
#14560
25K
15.53 mi12:52:582:02:167:5219:31
8:03
#14480
30K
18.64 mi13:18:452:28:037:5725:47
8:18
#14213
20M
20.00 mi13:30:202:39:387:5911:35
8:31
#14170
21M
21.00 mi13:39:282:48:468:029:08
9:08
#14155
35K
21.75 mi13:45:482:55:068:036:20
8:28
#14211
23M
23.00 mi13:56:543:06:128:0611:06
8:52
#14309
24M
24.00 mi14:05:303:14:488:078:36
8:36
#14316
40K
24.85 mi14:12:363:21:548:077:06
8:18
#14214
25.2M
25.20 mi14:15:403:24:588:083:04
8:54
#14153
Finish
26.22 mi14:23:293:32:478:077:49
7:40
#13965
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi139343866386615483(Top 55%)4850(Top 40%)4850(Top 89%)
10K6.21 mi3.10 mi14533-5994259-3934259-39315302(Top 54%)4722(Top 39%)4722(Top 86%)
15K9.32 mi3.11 mi14854-3214471-2124471-21215483(Top 55%)4850(Top 40%)4850(Top 89%)
20K12.43 mi3.11 mi14612+2424351+1204351+12014020(Top 49%)4108(Top 34%)4108(Top 75%)
Half13.11 mi0.68 mi14560+524322+294322+2914071(Top 50%)4104(Top 34%)4104(Top 75%)
25K15.53 mi2.42 mi14480+804323-14323-114280(Top 50%)4356(Top 36%)4356(Top 80%)
30K18.64 mi3.11 mi14213+2674229+944229+9413508(Top 48%)4109(Top 34%)4109(Top 75%)
20M20.00 mi1.36 mi14170+434227+24227+213954(Top 49%)4489(Top 37%)4489(Top 82%)
21M21.00 mi1.00 mi14155+154252-254252-2514278(Top 50%)4771(Top 39%)4771(Top 87%)
35K21.75 mi0.75 mi14211-564297-454297-4515261(Top 54%)5372(Top 44%)5372(Top 98%)
23M23.00 mi1.25 mi14309-984384-874384-8715488(Top 55%)5590(Top 46%)5590(Top 102%)
24M24.00 mi1.00 mi14316-74417-334417-3315173(Top 53%)5471(Top 45%)5471(Top 100%)
40K24.85 mi0.85 mi14214+1024395+224395+2212199(Top 43%)4021(Top 33%)4021(Top 74%)
25.2M25.20 mi0.35 mi14153+614372+234372+2311284(Top 40%)3658(Top 30%)3658(Top 67%)
Finish26.22 mi1.02 mi13965+1884297+754297+7510528(Top 37%)3243(Top 27%)3243(Top 59%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21stories
+97ft-345ft

Overall

15483

Females

4850

F18-39

4850

5K→10K

3.1 - 6.2 mi

Top 54%
×5stories
+79ft-138ft

Overall

15302

Females

4722

F18-39

4722

10K→15K

6.2 - 9.3 mi

Top 55%
×3stories
+67ft-78ft

Overall

15483

Females

4850

F18-39

4850

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

14020

Females

4108

F18-39

4108

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

14071

Females

4104

F18-39

4104

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

14280

Females

4356

F18-39

4356

25K→30K

15.5 - 18.6 mi

Top 48%
×9stories
+181ft-148ft

Overall

13508

Females

4109

F18-39

4109

30K→20M

18.6 - 20.0 mi

Top 49%
×5stories
+64ft-50ft

Overall

13954

Females

4489

F18-39

4489

20M→21M

20.0 - 21.0 mi

Top 50%
×8stories
+106ft-24ft

Overall

14278

Females

4771

F18-39

4771

21M→35K

21.0 - 21.8 mi

Top 54%
×7stories
+17ft-86ft

Overall

15261

Females

5372

F18-39

5372

35K→23M

21.8 - 23.0 mi

Top 55%
×5stories
+23ft-63ft

Overall

15488

Females

5590

F18-39

5590

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

15173

Females

5471

F18-39

5471

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12199

Females

4021

F18-39

4021

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

11284

Females

3658

F18-39

3658

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2stories
+22ft-21ft

Overall

10528

Females

3243

F18-39

3243

Passing Analysis

Category:
Athletes Passed
2043
Passed By
2074
Net Change
-31
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13934
5K → 10K113712-599#13934#14533
10K → 15K104425-321#14533#14854
15K → 20K32280+242#14854#14612
20K → Half6816+52#14612#14560
Half → 25K208128+80#14560#14480
25K → 30K381114+267#14480#14213
30K → 20M13188+43#14213#14170
20M → 21M125110+15#14170#14155
21M → 35K53109-56#14155#14211
35K → 23M80178-98#14211#14309
23M → 24M7481-7#14309#14316
24M → 40K12018+102#14316#14214
40K → 25.2M7110+61#14214#14153
25.2M → Finish1935+188#14153#13965
TOTALS20432074-31
📊

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