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BOSTON MARATHON 2023

Kathryn Ackroyd

Bib: 27734•F

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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 44%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:17
Rank: #19362
Start → 5K
8:47/mi
27:17 split
10K· 6.21 mi
53:02
Rank: #18113 (+1249)
5K → 10K
8:17/mi
25:45 split
15K· 9.32 mi
1:18:12
Rank: #17134 (+979)
10K → 15K
8:06/mi
25:10 split
20K· 12.43 mi
1:43:21
Rank: #16406 (+728)
15K → 20K
8:06/mi
25:09 split
Half· 13.11 mi
1:48:48
Rank: #16279 (+127)
20K → Half
7:59/mi
5:27 split
25K· 15.53 mi
2:08:48
Rank: #15978 (+301)
Half → 25K
8:15/mi
20:00 split
30K· 18.64 mi
2:35:42
Rank: #15830 (+148)
25K → 30K
8:39/mi
26:54 split
20M
2:47:21
Rank: #15662 (+168)
30K → 20M
8:34/mi
11:39 split
21M
2:56:30
Rank: #15562 (+100)
20M → 21M
9:09/mi
9:09 split
35K· 21.75 mi
3:02:38
Rank: #15482 (+80)
21M → 35K
8:12/mi
6:08 split
23M
3:13:23
Rank: #15348 (+134)
35K → 23M
8:35/mi
10:45 split
24M
3:21:44
Rank: #15244 (+104)
23M → 24M
8:21/mi
8:21 split
40K· 24.85 mi
3:29:14
Rank: #15239 (+5)
24M → 40K
8:46/mi
7:30 split
25.2M
3:32:24
Rank: #15190 (+49)
40K → 25.2M
9:11/mi
3:10 split
Finish· 26.22 mi
3:41:01
Rank: #15187 (+3)
25.2M → Finish
8:27/mi
8:37 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:48
Pace8:18 /mi
2nd Half
Distance13.11 mi
Time1:52:13
Pace8:34 /mi
📊Positive Split: 3.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:2327:178:4727:17
8:47
-
10K
6.21 mi12:15:0853:028:3225:45
8:17
-0:30
15K
9.32 mi12:40:181:18:128:2325:10
8:06
-0:11
20K
12.43 mi13:05:271:43:218:1925:09
8:06
0:00
Half
13.11 mi13:10:541:48:488:185:27
7:59
-0:07
25K
15.53 mi13:30:542:08:488:1720:00
8:15
+0:16
30K
18.64 mi13:57:482:35:428:2126:54
8:39
+0:24
20M
20.00 mi14:09:272:47:218:2211:39
8:34
-0:05
21M
21.00 mi14:18:362:56:308:249:09
9:09
+0:35
35K
21.75 mi14:24:443:02:388:246:08
8:12
-0:57
23M
23.00 mi14:35:293:13:238:2410:45
8:35
+0:23
24M
24.00 mi14:43:503:21:448:248:21
8:21
-0:14
40K
24.85 mi14:51:203:29:148:257:30
8:46
+0:25
25.2M
25.20 mi14:54:303:32:248:263:10
9:11
+0:25
Finish
26.22 mi15:03:073:41:018:268:37
8:27
-0:44

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

7:59 /mi

Average Pace

8:26 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:01:25

82% of race

Time at Steady Pace

39:36

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:26 /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 mi11:49:2327:178:4727:17
8:47
#19362
10K
6.21 mi12:15:0853:028:3225:45
8:17
#18113
15K
9.32 mi12:40:181:18:128:2325:10
8:06
#17134
20K
12.43 mi13:05:271:43:218:1925:09
8:06
#16406
Half
13.11 mi13:10:541:48:488:185:27
7:59
#16279
25K
15.53 mi13:30:542:08:488:1720:00
8:15
#15978
30K
18.64 mi13:57:482:35:428:2126:54
8:39
#15830
20M
20.00 mi14:09:272:47:218:2211:39
8:34
#15662
21M
21.00 mi14:18:362:56:308:249:09
9:09
#15562
35K
21.75 mi14:24:443:02:388:246:08
8:12
#15482
23M
23.00 mi14:35:293:13:238:2410:45
8:35
#15348
24M
24.00 mi14:43:503:21:448:248:21
8:21
#15244
40K
24.85 mi14:51:203:29:148:257:30
8:46
#15239
25.2M
25.20 mi14:54:303:32:248:263:10
9:11
#15190
Finish
26.22 mi15:03:073:41:018:268:37
8:27
#15187
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi193627413741315185(Top 57%)4785(Top 42%)4785(Top 98%)
10K6.21 mi3.10 mi18113+12496592+8216592+82116857(Top 63%)5780(Top 51%)5780(Top 118%)
15K9.32 mi3.11 mi17134+9795988+6045988+60415185(Top 57%)4785(Top 42%)4785(Top 98%)
20K12.43 mi3.11 mi16406+7285556+4325556+43214213(Top 53%)4235(Top 37%)4235(Top 87%)
Half13.11 mi0.68 mi16279+1275474+825474+8214378(Top 54%)4322(Top 38%)4322(Top 88%)
25K15.53 mi2.42 mi15978+3015323+1515323+15114600(Top 55%)4588(Top 40%)4588(Top 94%)
30K18.64 mi3.11 mi15830+1485269+545269+5415277(Top 57%)5102(Top 45%)5102(Top 104%)
20M20.00 mi1.36 mi15662+1685187+825187+8214115(Top 53%)4487(Top 39%)4487(Top 92%)
21M21.00 mi1.00 mi15562+1005152+355152+3514240(Top 53%)4617(Top 40%)4617(Top 95%)
35K21.75 mi0.75 mi15482+805119+335119+3313494(Top 51%)4293(Top 38%)4293(Top 88%)
23M23.00 mi1.25 mi15348+1345061+585061+5813749(Top 52%)4477(Top 39%)4477(Top 92%)
24M24.00 mi1.00 mi15244+1045005+565005+5613570(Top 51%)4439(Top 39%)4439(Top 91%)
40K24.85 mi0.85 mi15239+55016-115016-1114955(Top 56%)5270(Top 46%)5270(Top 108%)
25.2M25.20 mi0.35 mi15190+495003+135003+1313622(Top 51%)4559(Top 40%)4559(Top 93%)
Finish26.22 mi1.02 mi15187+35018-155018-1515150(Top 57%)5339(Top 47%)5339(Top 109%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21stories
+97ft-345ft

Overall

15185

Females

4785

F18-39

4785

5K→10K

3.1 - 6.2 mi

Top 63%
×5stories
+79ft-138ft

Overall

16857

Females

5780

F18-39

5780

10K→15K

6.2 - 9.3 mi

Top 57%
×3stories
+67ft-78ft

Overall

15185

Females

4785

F18-39

4785

15K→20K

9.3 - 12.4 mi

Top 53%
×5stories
+106ft-86ft

Overall

14213

Females

4235

F18-39

4235

20K→Half

12.4 - 13.1 mi

Top 54%
×2stories
+19ft-37ft

Overall

14378

Females

4322

F18-39

4322

Half→25K

13.1 - 15.5 mi

Top 55%
×4stories
+66ft-88ft

Overall

14600

Females

4588

F18-39

4588

25K→30K

15.5 - 18.6 mi

Top 57%
×9stories
+181ft-148ft

Overall

15277

Females

5102

F18-39

5102

30K→20M

18.6 - 20.0 mi

Top 53%
×5stories
+64ft-50ft

Overall

14115

Females

4487

F18-39

4487

20M→21M

20.0 - 21.0 mi

Top 53%
×8stories
+106ft-24ft

Overall

14240

Females

4617

F18-39

4617

21M→35K

21.0 - 21.8 mi

Top 51%
×7stories
+17ft-86ft

Overall

13494

Females

4293

F18-39

4293

35K→23M

21.8 - 23.0 mi

Top 52%
×5stories
+23ft-63ft

Overall

13749

Females

4477

F18-39

4477

23M→24M

23.0 - 24.0 mi

Top 51%
×6stories
+12ft-82ft

Overall

13570

Females

4439

F18-39

4439

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

14955

Females

5270

F18-39

5270

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

13622

Females

4559

F18-39

4559

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

15150

Females

5339

F18-39

5339

Passing Analysis

Category:
Athletes Passed
4609
Passed By
434
Net Change
+4175
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19362
5K → 10K130758+1249#19362#18113
10K → 15K99213+979#18113#17134
15K → 20K7357+728#17134#16406
20K → Half1303+127#16406#16279
Half → 25K32120+301#16279#15978
25K → 30K24597+148#15978#15830
30K → 20M18315+168#15830#15662
20M → 21M13333+100#15662#15562
21M → 35K9313+80#15562#15482
35K → 23M16228+134#15482#15348
23M → 24M12319+104#15348#15244
24M → 40K5853+5#15244#15239
40K → 25.2M6213+49#15239#15190
25.2M → Finish6562+3#15190#15187
TOTALS4609434+4175
📊

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