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BOSTON MARATHON 2024

Katherine Shirriff

Bib: 10342•F

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0:00
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Overall
#0 / 25550
Top 22%
Gender (Female)
#0 / 10924
Top 8%
Division (F18-39)
#0 / 4660
Top 15%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:31
Rank: #8788
Start → 5K
22:31 | 7:15/mi
10K· 6.21 mi
45:13
Rank: #8729 (+59)
5K → 10K
22:42 | 7:18/mi
15K· 9.32 mi
1:07:56
Rank: #8530 (+199)
10K → 15K
22:43 | 7:19/mi
20K· 12.43 mi
1:30:53
Rank: #8220 (+310)
15K → 20K
22:57 | 7:23/mi
Half· 13.11 mi
1:35:50
Rank: #8171 (+49)
20K → Half
4:57 | 7:15/mi
25K· 15.53 mi
1:53:47
Rank: #7779 (+392)
Half → 25K
17:57 | 7:24/mi
30K· 18.64 mi
2:17:43
Rank: #7362 (+417)
25K → 30K
23:56 | 7:42/mi
20M
2:28:16
Rank: #7166 (+196)
30K → 20M
10:33 | 7:46/mi
21M
2:36:28
Rank: #6893 (+273)
20M → 21M
8:12 | 8:12/mi
35K· 21.75 mi
2:41:52
Rank: #6688 (+205)
21M → 35K
5:24 | 7:13/mi
23M
2:51:28
Rank: #6416 (+272)
35K → 23M
9:36 | 7:40/mi
24M
2:58:51
Rank: #6193 (+223)
23M → 24M
7:23 | 7:23/mi
40K· 24.85 mi
3:05:14
Rank: #6001 (+192)
24M → 40K
6:23 | 7:28/mi
25.2M
3:08:05
Rank: #5909 (+92)
40K → 25.2M
2:51 | 8:16/mi
Finish· 26.22 mi
3:15:06
Rank: #5717 (+192)
25.2M → Finish
7:01 | 6:53/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:50
Pace7:19 /mi
2nd Half
Distance13.11 mi
Time1:39:16
Pace7:34 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:2722:317:1522:31
7:15
-
10K
6.21 mi11:12:0945:137:1722:42
7:18
+0:03
15K
9.32 mi11:34:521:07:567:1722:43
7:19
+0:01
20K
12.43 mi11:57:491:30:537:1922:57
7:23
+0:04
Half
13.11 mi12:02:461:35:507:194:57
7:15
-0:08
25K
15.53 mi12:20:431:53:477:1917:57
7:24
+0:09
30K
18.64 mi12:44:392:17:437:2323:56
7:42
+0:18
20M
20.00 mi12:55:122:28:167:2510:33
7:46
+0:04
21M
21.00 mi13:03:242:36:287:278:12
8:12
+0:26
35K
21.75 mi13:08:482:41:527:275:24
7:13
-0:59
23M
23.00 mi13:18:242:51:287:279:36
7:40
+0:27
24M
24.00 mi13:25:472:58:517:277:23
7:23
-0:17
40K
24.85 mi13:32:103:05:147:276:23
7:28
+0:05
25.2M
25.20 mi13:35:013:08:057:282:51
8:16
+0:48
Finish
26.22 mi13:42:023:15:067:277:01
6:53
-1:23

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

6:53 /mi

Average Pace

7:27 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

7:01

4% of race

Time at Steady Pace

2:12:57

68% of race

Time at Slower Pace

55:08

28% of race

Average Pace: 7:26 /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 mi10:49:2722:317:1522:31
7:15
#8788
10K
6.21 mi11:12:0945:137:1722:42
7:18
#8729
15K
9.32 mi11:34:521:07:567:1722:43
7:19
#8530
20K
12.43 mi11:57:491:30:537:1922:57
7:23
#8220
Half
13.11 mi12:02:461:35:507:194:57
7:15
#8171
25K
15.53 mi12:20:431:53:477:1917:57
7:24
#7779
30K
18.64 mi12:44:392:17:437:2323:56
7:42
#7362
20M
20.00 mi12:55:122:28:167:2510:33
7:46
#7166
21M
21.00 mi13:03:242:36:287:278:12
8:12
#6893
35K
21.75 mi13:08:482:41:527:275:24
7:13
#6688
23M
23.00 mi13:18:242:51:287:279:36
7:40
#6416
24M
24.00 mi13:25:472:58:517:277:23
7:23
#6193
40K
24.85 mi13:32:103:05:147:276:23
7:28
#6001
25.2M
25.20 mi13:35:013:08:057:282:51
8:16
#5909
Finish
26.22 mi13:42:023:15:067:277:01
6:53
#5717
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8788148614868244(Top 32%)1362(Top 12%)1362(Top 29%)
10K6.21 mi3.10 mi8729+591505-191505-198733(Top 34%)1522(Top 14%)1522(Top 33%)
15K9.32 mi3.11 mi8530+1991426+791426+798244(Top 32%)1362(Top 12%)1362(Top 29%)
20K12.43 mi3.11 mi8220+3101332+941332+947551(Top 30%)1198(Top 11%)1198(Top 26%)
Half13.11 mi0.68 mi8171+491312+201312+207379(Top 29%)1114(Top 10%)1114(Top 24%)
25K15.53 mi2.42 mi7779+3921203+1091203+1096439(Top 25%)954(Top 9%)954(Top 20%)
30K18.64 mi3.11 mi7362+4171115+881115+886169(Top 24%)1037(Top 9%)1037(Top 22%)
20M20.00 mi1.36 mi7166+1961084+311084+315539(Top 22%)942(Top 9%)942(Top 20%)
21M21.00 mi1.00 mi6893+2731042+421042+424948(Top 19%)867(Top 8%)867(Top 19%)
35K21.75 mi0.75 mi6688+2051002+401002+403875(Top 15%)500(Top 5%)500(Top 11%)
23M23.00 mi1.25 mi6416+272950+52950+524269(Top 17%)712(Top 7%)712(Top 15%)
24M24.00 mi1.00 mi6193+223911+39911+393701(Top 14%)573(Top 5%)573(Top 12%)
40K24.85 mi0.85 mi6001+192878+33878+333393(Top 13%)570(Top 5%)570(Top 12%)
25.2M25.20 mi0.35 mi5909+92865+13865+133645(Top 14%)686(Top 6%)686(Top 15%)
Finish26.22 mi1.02 mi5717+192834+31834+312694(Top 11%)386(Top 4%)386(Top 8%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21stories
+97ft-345ft

Overall

8244

Females

1362

F18-39

1362

5K→10K

3.1 - 6.2 mi

Top 34%
×5stories
+79ft-138ft

Overall

8733

Females

1522

F18-39

1522

10K→15K

6.2 - 9.3 mi

Top 32%
×3stories
+67ft-78ft

Overall

8244

Females

1362

F18-39

1362

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

7551

Females

1198

F18-39

1198

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

7379

Females

1114

F18-39

1114

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

6439

Females

954

F18-39

954

25K→30K

15.5 - 18.6 mi

Top 24%
×9stories
+181ft-148ft

Overall

6169

Females

1037

F18-39

1037

30K→20M

18.6 - 20.0 mi

Top 22%
×5stories
+64ft-50ft

Overall

5539

Females

942

F18-39

942

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

4948

Females

867

F18-39

867

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

3875

Females

500

F18-39

500

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4269

Females

712

F18-39

712

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

3701

Females

573

F18-39

573

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3393

Females

570

F18-39

570

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

3645

Females

686

F18-39

686

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

2694

Females

386

F18-39

386

Passing Analysis

Category:
Athletes Passed
3546
Passed By
475
Net Change
+3071
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8788
5K → 10K270211+59#8788#8729
10K → 15K28081+199#8729#8530
15K → 20K35949+310#8530#8220
20K → Half5910+49#8220#8171
Half → 25K41624+392#8171#7779
25K → 30K46245+417#7779#7362
30K → 20M21822+196#7362#7166
20M → 21M28512+273#7166#6893
21M → 35K2072+205#6893#6688
35K → 23M2819+272#6688#6416
23M → 24M2230+223#6416#6193
24M → 40K1975+192#6193#6001
40K → 25.2M953+92#6001#5909
25.2M → Finish1942+192#5909#5717
TOTALS3546475+3071
📊

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