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BOSTON MARATHON 2023

Kelsey Cook

Bib: 13909•F

CO

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0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
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
26:02
Rank: #16751
Start → 5K
8:23/mi
26:02 split
10K· 6.21 mi
51:31
Rank: #16449 (+302)
5K → 10K
8:12/mi
25:29 split
15K· 9.32 mi
1:17:37
Rank: #16714 (-265)
10K → 15K
8:24/mi
26:06 split
20K· 12.43 mi
1:46:55
Rank: #18228 (-1514)
15K → 20K
9:26/mi
29:18 split
Half· 13.11 mi
1:52:36
Rank: #18144 (+84)
20K → Half
8:20/mi
5:41 split
25K· 15.53 mi
2:16:06
Rank: #18903 (-759)
Half → 25K
9:42/mi
23:30 split
30K· 18.64 mi
2:46:18
Rank: #19214 (-311)
25K → 30K
9:43/mi
30:12 split
20M
3:00:06
Rank: #19388 (-174)
30K → 20M
10:10/mi
13:48 split
21M
3:10:16
Rank: #19329 (+59)
20M → 21M
10:10/mi
10:10 split
35K· 21.75 mi
3:17:56
Rank: #19470 (-141)
21M → 35K
10:15/mi
7:40 split
23M
3:34:30
Rank: #20222 (-752)
35K → 23M
13:14/mi
16:34 split
24M
3:45:19
Rank: #20360 (-138)
23M → 24M
10:49/mi
10:49 split
40K· 24.85 mi
3:54:33
Rank: #20416 (-56)
24M → 40K
10:48/mi
9:14 split
25.2M
3:58:33
Rank: #20432 (-16)
40K → 25.2M
11:36/mi
4:00 split
Finish· 26.22 mi
4:08:46
Rank: #20499 (-67)
25.2M → Finish
10:02/mi
10:13 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:36
Pace8:35 /mi
2nd Half
Distance13.11 mi
Time2:16:10
Pace10:23 /mi
📊Positive Split: 20.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:4026:028:2326:02
8:23
-
10K
6.21 mi11:20:0951:318:1725:29
8:12
-0:11
15K
9.32 mi11:46:151:17:378:2026:06
8:24
+0:12
20K
12.43 mi12:15:331:46:558:3629:18
9:26
+1:02
Half
13.11 mi12:21:141:52:368:355:41
8:20
-1:06
25K
15.53 mi12:44:442:16:068:4623:30
9:42
+1:22
30K
18.64 mi13:14:562:46:188:5530:12
9:43
+0:01
20M
20.00 mi13:28:443:00:069:0013:48
10:10
+0:27
21M
21.00 mi13:38:543:10:169:0410:10
10:10
0:00
35K
21.75 mi13:46:343:17:569:067:40
10:15
+0:05
23M
23.00 mi14:03:083:34:309:2016:34
13:14
+2:59
24M
24.00 mi14:13:573:45:199:2310:49
10:49
-2:25
40K
24.85 mi14:23:113:54:339:269:14
10:48
-0:01
25.2M
25.20 mi14:27:113:58:339:284:00
11:36
+0:48
Finish
26.22 mi14:37:244:08:469:3010:13
10:02
-1:34

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

8:12 /mi

Average Pace

9:30 /mi

Slowest Pace

13:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:23:18

33% of race

Time at Steady Pace

2:04:51

50% of race

Time at Slower Pace

40:37

16% of race

Average Pace: 9:29 /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 mi10:54:4026:028:2326:02
8:23
#16751
10K
6.21 mi11:20:0951:318:1725:29
8:12
#16449
15K
9.32 mi11:46:151:17:378:2026:06
8:24
#16714
20K
12.43 mi12:15:331:46:558:3629:18
9:26
#18228
Half
13.11 mi12:21:141:52:368:355:41
8:20
#18144
25K
15.53 mi12:44:442:16:068:4623:30
9:42
#18903
30K
18.64 mi13:14:562:46:188:5530:12
9:43
#19214
20M
20.00 mi13:28:443:00:069:0013:48
10:10
#19388
21M
21.00 mi13:38:543:10:169:0410:10
10:10
#19329
35K
21.75 mi13:46:343:17:569:067:40
10:15
#19470
23M
23.00 mi14:03:083:34:309:2016:34
13:14
#20222
24M
24.00 mi14:13:573:45:199:2310:49
10:49
#20360
40K
24.85 mi14:23:113:54:339:269:14
10:48
#20416
25.2M
25.20 mi14:27:113:58:339:284:00
11:36
#20432
Finish
26.22 mi14:37:244:08:469:3010:13
10:02
#20499
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 mi167515766576617168(Top 64%)6031(Top 53%)6031(Top 123%)
10K6.21 mi3.10 mi16449+3025556+2105556+21016288(Top 61%)5454(Top 48%)5454(Top 112%)
15K9.32 mi3.11 mi16714-2655742-1865742-18617168(Top 64%)6031(Top 53%)6031(Top 123%)
20K12.43 mi3.11 mi18228-15146647-9056647-90521328(Top 80%)8418(Top 74%)8418(Top 172%)
Half13.11 mi0.68 mi18144+846597+506597+5016761(Top 63%)5772(Top 51%)5772(Top 118%)
25K15.53 mi2.42 mi18903-7597064-4677064-46721428(Top 80%)8520(Top 75%)8520(Top 174%)
30K18.64 mi3.11 mi19214-3117266-2027266-20220209(Top 76%)7888(Top 69%)7888(Top 162%)
20M20.00 mi1.36 mi19388-1747384-1187384-11820911(Top 79%)8364(Top 73%)8364(Top 171%)
21M21.00 mi1.00 mi19329+597363+217363+2118578(Top 70%)7105(Top 62%)7105(Top 145%)
35K21.75 mi0.75 mi19470-1417446-837446-8321881(Top 82%)8980(Top 79%)8980(Top 184%)
23M23.00 mi1.25 mi20222-7527895-4497895-44925304(Top 95%)10794(Top 94%)10794(Top 221%)
24M24.00 mi1.00 mi20360-1387981-867981-8622693(Top 85%)9466(Top 83%)9466(Top 194%)
40K24.85 mi0.85 mi20416-568019-388019-3821942(Top 82%)9119(Top 80%)9119(Top 187%)
25.2M25.20 mi0.35 mi20432-168038-198038-1921772(Top 82%)8997(Top 79%)8997(Top 184%)
Finish26.22 mi1.02 mi20499-678087-498087-4921832(Top 82%)9024(Top 79%)9024(Top 185%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

17168

Females

6031

F18-39

6031

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

16288

Females

5454

F18-39

5454

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

17168

Females

6031

F18-39

6031

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

21328

Females

8418

F18-39

8418

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

16761

Females

5772

F18-39

5772

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

21428

Females

8520

F18-39

8520

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

20209

Females

7888

F18-39

7888

30K→20M

18.6 - 20.0 mi

Top 79%
×5story building
+64ft-50ft

Overall

20911

Females

8364

F18-39

8364

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

18578

Females

7105

F18-39

7105

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

21881

Females

8980

F18-39

8980

35K→23M

21.8 - 23.0 mi

Top 95%
×5story building
+23ft-63ft

Overall

25304

Females

10794

F18-39

10794

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

22693

Females

9466

F18-39

9466

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

21942

Females

9119

F18-39

9119

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

21772

Females

8997

F18-39

8997

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2story building
+22ft-21ft

Overall

21832

Females

9024

F18-39

9024

Passing Analysis

Category:
Athletes Passed
1061
Passed By
4809
Net Change
-3748
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16751
5K → 10K486184+302#16751#16449
10K → 15K112377-265#16449#16714
15K → 20K191533-1514#16714#18228
20K → Half917+84#18228#18144
Half → 25K18777-759#18144#18903
25K → 30K81392-311#18903#19214
30K → 20M44218-174#19214#19388
20M → 21M11152+59#19388#19329
21M → 35K16157-141#19329#19470
35K → 23M7759-752#19470#20222
23M → 24M10148-138#20222#20360
24M → 40K2379-56#20360#20416
40K → 25.2M2137-16#20416#20432
25.2M → Finish2289-67#20432#20499
TOTALS10614809-3748
📊

Passing Visuals

Category:
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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