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BOSTON MARATHON 2025

Katherine Kalill

Bib: 16086•F

WA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 42%
Gender (Female)
#0 / 12228
Top 26%
Division (F18-39)
#0 / 5469
Top 43%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:15
Rank: #12104
Start → 5K
23:15 | 7:29/mi
10K· 6.21 mi
46:47
Rank: #12398 (-294)
5K → 10K
23:32 | 7:34/mi
15K· 9.32 mi
1:10:18
Rank: #12354 (+44)
10K → 15K
23:31 | 7:34/mi
20K· 12.43 mi
1:33:54
Rank: #12134 (+220)
15K → 20K
23:36 | 7:36/mi
Half· 13.11 mi
1:39:07
Rank: #12168 (-34)
20K → Half
5:13 | 7:39/mi
25K· 15.53 mi
1:57:27
Rank: #11851 (+317)
Half → 25K
18:20 | 7:34/mi
30K· 18.64 mi
2:21:58
Rank: #11556 (+295)
25K → 30K
24:31 | 7:53/mi
20M
2:32:56
Rank: #11451 (+105)
30K → 20M
10:58 | 8:04/mi
21M
2:41:38
Rank: #11441 (+10)
20M → 21M
8:42 | 8:42/mi
35K· 21.75 mi
2:47:20
Rank: #11346 (+95)
21M → 35K
5:42 | 7:37/mi
23M
2:57:41
Rank: #11351 (-5)
35K → 23M
10:21 | 8:16/mi
24M
3:05:57
Rank: #11397 (-46)
23M → 24M
8:16 | 8:16/mi
40K· 24.85 mi
3:13:33
Rank: #11583 (-186)
24M → 40K
7:36 | 8:53/mi
25.2M
3:17:00
Rank: #11701 (-118)
40K → 25.2M
3:27 | 10:00/mi
Finish· 26.22 mi
3:25:27
Rank: #11817 (-116)
25.2M → Finish
8:27 | 8:18/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:07
Pace7:34 /mi
2nd Half
Distance13.11 mi
Time1:46:20
Pace8:07 /mi
📊Positive Split: 7.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:1723:157:2923:15
7:29
-
10K
6.21 mi11:20:4946:477:3223:32
7:34
+0:05
15K
9.32 mi11:44:201:10:187:3323:31
7:34
0:00
20K
12.43 mi12:07:561:33:547:3323:36
7:36
+0:02
Half
13.11 mi12:13:091:39:077:345:13
7:39
+0:03
25K
15.53 mi12:31:291:57:277:3418:20
7:34
-0:05
30K
18.64 mi12:56:002:21:587:3724:31
7:53
+0:19
20M
20.00 mi13:06:582:32:567:3910:58
8:04
+0:11
21M
21.00 mi13:15:402:41:387:428:42
8:42
+0:38
35K
21.75 mi13:21:222:47:207:425:42
7:37
-1:05
23M
23.00 mi13:31:432:57:417:4410:21
8:16
+0:39
24M
24.00 mi13:39:593:05:577:458:16
8:16
0:00
40K
24.85 mi13:47:353:13:337:477:36
8:53
+0:37
25.2M
25.20 mi13:51:023:17:007:493:27
10:00
+1:07
Finish
26.22 mi13:59:293:25:277:508:27
8:18
-1:42

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

7:29 /mi

Average Pace

7:50 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

23:15

11% of race

Time at Steady Pace

2:15:23

66% of race

Time at Slower Pace

46:49

23% of race

Average Pace: 7:50 /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 mi10:57:1723:157:2923:15
7:29
#12104
10K
6.21 mi11:20:4946:477:3223:32
7:34
#12398
15K
9.32 mi11:44:201:10:187:3323:31
7:34
#12354
20K
12.43 mi12:07:561:33:547:3323:36
7:36
#12134
Half
13.11 mi12:13:091:39:077:345:13
7:39
#12168
25K
15.53 mi12:31:291:57:277:3418:20
7:34
#11851
30K
18.64 mi12:56:002:21:587:3724:31
7:53
#11556
20M
20.00 mi13:06:582:32:567:3910:58
8:04
#11451
21M
21.00 mi13:15:402:41:387:428:42
8:42
#11441
35K
21.75 mi13:21:222:47:207:425:42
7:37
#11346
23M
23.00 mi13:31:432:57:417:4410:21
8:16
#11351
24M
24.00 mi13:39:593:05:577:458:16
8:16
#11397
40K
24.85 mi13:47:353:13:337:477:36
8:53
#11583
25.2M
25.20 mi13:51:023:17:007:493:27
10:00
#11701
Finish
26.22 mi13:59:293:25:277:508:27
8:18
#11817
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi121042853285312340(Top 43%)3082(Top 25%)3082(Top 56%)
10K6.21 mi3.10 mi12398-2943013-1603013-16012804(Top 45%)3253(Top 27%)3253(Top 59%)
15K9.32 mi3.11 mi12354+443025-123025-1212340(Top 43%)3082(Top 25%)3082(Top 56%)
20K12.43 mi3.11 mi12134+2202945+802945+8011595(Top 41%)2786(Top 23%)2786(Top 51%)
Half13.11 mi0.68 mi12168-342972-272972-2713003(Top 46%)3489(Top 29%)3489(Top 64%)
25K15.53 mi2.42 mi11851+3172844+1282844+12810462(Top 37%)2314(Top 19%)2314(Top 42%)
30K18.64 mi3.11 mi11556+2952760+842760+8410584(Top 37%)2590(Top 21%)2590(Top 47%)
20M20.00 mi1.36 mi11451+1052750+102750+1010922(Top 38%)2909(Top 24%)2909(Top 53%)
21M21.00 mi1.00 mi11441+102786-362786-3611686(Top 41%)3436(Top 28%)3436(Top 63%)
35K21.75 mi0.75 mi11346+952755+312755+319539(Top 34%)2394(Top 20%)2394(Top 44%)
23M23.00 mi1.25 mi11351-52808-532808-5311840(Top 42%)3651(Top 30%)3651(Top 67%)
24M24.00 mi1.00 mi11397-462858-502858-5013036(Top 46%)4327(Top 35%)4327(Top 79%)
40K24.85 mi0.85 mi11583-1862990-1322990-13215699(Top 55%)5883(Top 48%)5883(Top 108%)
25.2M25.20 mi0.35 mi11701-1183064-743064-7417056(Top 60%)6594(Top 54%)6594(Top 121%)
Finish26.22 mi1.02 mi11817-1163165-1013165-10114865(Top 52%)5393(Top 44%)5393(Top 99%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21stories
+97ft-345ft

Overall

12340

Females

3082

F18-39

3082

5K→10K

3.1 - 6.2 mi

Top 45%
×5stories
+79ft-138ft

Overall

12804

Females

3253

F18-39

3253

10K→15K

6.2 - 9.3 mi

Top 43%
×3stories
+67ft-78ft

Overall

12340

Females

3082

F18-39

3082

15K→20K

9.3 - 12.4 mi

Top 41%
×5stories
+106ft-86ft

Overall

11595

Females

2786

F18-39

2786

20K→Half

12.4 - 13.1 mi

Top 46%
×2stories
+19ft-37ft

Overall

13003

Females

3489

F18-39

3489

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

10462

Females

2314

F18-39

2314

25K→30K

15.5 - 18.6 mi

Top 37%
×9stories
+181ft-148ft

Overall

10584

Females

2590

F18-39

2590

30K→20M

18.6 - 20.0 mi

Top 38%
×5stories
+64ft-50ft

Overall

10922

Females

2909

F18-39

2909

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

11686

Females

3436

F18-39

3436

21M→35K

21.0 - 21.8 mi

Top 34%
×7stories
+17ft-86ft

Overall

9539

Females

2394

F18-39

2394

35K→23M

21.8 - 23.0 mi

Top 42%
×5stories
+23ft-63ft

Overall

11840

Females

3651

F18-39

3651

23M→24M

23.0 - 24.0 mi

Top 46%
×6stories
+12ft-82ft

Overall

13036

Females

4327

F18-39

4327

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

15699

Females

5883

F18-39

5883

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

17056

Females

6594

F18-39

6594

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2stories
+22ft-21ft

Overall

14865

Females

5393

F18-39

5393

Passing Analysis

Category:
Athletes Passed
2051
Passed By
1764
Net Change
+287
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12104
5K → 10K156450-294#12104#12398
10K → 15K202158+44#12398#12354
15K → 20K29979+220#12354#12134
20K → Half2155-34#12134#12168
Half → 25K34831+317#12168#11851
25K → 30K36772+295#11851#11556
30K → 20M17469+105#11556#11451
20M → 21M9888+10#11451#11441
21M → 35K11419+95#11441#11346
35K → 23M110115-5#11346#11351
23M → 24M68114-46#11351#11397
24M → 40K32218-186#11397#11583
40K → 25.2M8126-118#11583#11701
25.2M → Finish54170-116#11701#11817
TOTALS20511764+287
📊

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