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BOSTON MARATHON 2023

Debra Cookson

Bib: 11379•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 33%
Gender (Female)
#0 / 11423
Top 14%
Masters (Masters Women)
#0 / 6539
Top 5%
Division (F45-49)
#0 / 1817
Top 5%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:34/mi
23:29
↑ 97↓ 3451.5%
10K· 6.21 mi
7:21/mi
46:19
↑ 79↓ 1380.4%
15K· 9.32 mi
7:28/mi
1:09:32
↑ 67↓ 78
20K· 12.43 mi
7:30/mi
1:32:51
↑ 106↓ 860.1%
Half· 13.11 mi
7:15/mi
1:37:48
↑ 19↓ 370.5%
25K· 15.53 mi
7:30/mi
1:56:00
↑ 66↓ 880.2%
30K· 18.64 mi
7:42/mi
2:19:56
↑ 181↓ 1480.2%
20M
7:46/mi
2:30:29
↑ 64↓ 500.2%
21M
8:09/mi
2:38:38
↑ 106↓ 241.6%
35K· 21.75 mi
7:33/mi
2:44:17
↑ 17↓ 861.7%
23M
7:49/mi
2:54:04
↑ 23↓ 630.6%
24M
7:39/mi
3:01:43
↓ 821.3%
40K· 24.85 mi
7:55/mi
3:08:29
↓ 200.3%
25.2M
8:25/mi
3:11:23
↑ 13↓ 160.2%
Finish· 26.22 mi
7:33/mi
3:19:05
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:48
Pace7:28 /mi
2nd Half
Distance13.11 mi
Time1:41:17
Pace7:44 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:1923:297:3423:29
7:34
-
10K
6.21 mi11:13:0946:197:2722:50
7:21
-0:13
15K
9.32 mi11:36:221:09:327:2823:13
7:28
+0:07
20K
12.43 mi11:59:411:32:517:2823:19
7:30
+0:02
Half
13.11 mi12:04:381:37:487:284:57
7:15
-0:15
25K
15.53 mi12:22:501:56:007:2818:12
7:30
+0:15
30K
18.64 mi12:46:462:19:567:3023:56
7:42
+0:12
20M
20.00 mi12:57:192:30:297:3110:33
7:46
+0:04
21M
21.00 mi13:05:282:38:387:338:09
8:09
+0:23
35K
21.75 mi13:11:072:44:177:335:39
7:33
-0:36
23M
23.00 mi13:20:542:54:047:349:47
7:49
+0:16
24M
24.00 mi13:28:333:01:437:347:39
7:39
-0:10
40K
24.85 mi13:35:193:08:297:356:46
7:55
+0:16
25.2M
25.20 mi13:38:133:11:237:362:54
8:25
+0:30
Finish
26.22 mi13:45:553:19:057:367:42
7:33
-0:52

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

7:15 /mi

Average Pace

7:36 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:08:02

94% of race

Time at Steady Pace

11:03

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:36 /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 mi10:50:1923:297:3423:29
7:34
#10152
10K
6.21 mi11:13:0946:197:2722:50
7:21
#9613
15K
9.32 mi11:36:221:09:327:2823:13
7:28
#9691
20K
12.43 mi11:59:411:32:517:2823:19
7:30
#9582
Half
13.11 mi12:04:381:37:487:284:57
7:15
#9515
25K
15.53 mi12:22:501:56:007:2818:12
7:30
#9373
30K
18.64 mi12:46:462:19:567:3023:56
7:42
#9216
20M
20.00 mi12:57:192:30:297:3110:33
7:46
#9140
21M
21.00 mi13:05:282:38:387:338:09
8:09
#9053
35K
21.75 mi13:11:072:44:177:335:39
7:33
#9048
23M
23.00 mi13:20:542:54:047:349:47
7:49
#8985
24M
24.00 mi13:28:333:01:437:347:39
7:39
#8959
40K
24.85 mi13:35:193:08:297:356:46
7:55
#8948
25.2M
25.20 mi13:38:133:11:237:362:54
8:25
#8936
Finish
26.22 mi13:45:553:19:057:367:42
7:33
#8914
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi10152193319339960(Top 37%)1820(Top 16%)1820(Top 100%)
10K6.21 mi3.10 mi9613+5391664+2691664+2699237(Top 35%)1510(Top 13%)1510(Top 83%)
15K9.32 mi3.11 mi9691-781708-441708-449960(Top 37%)1820(Top 16%)1820(Top 100%)
20K12.43 mi3.11 mi9582+1091663+451663+459359(Top 35%)1626(Top 14%)1626(Top 89%)
Half13.11 mi0.68 mi9515+671636+271636+278330(Top 31%)1235(Top 11%)1235(Top 68%)
25K15.53 mi2.42 mi9373+1421594+421594+428853(Top 33%)1504(Top 13%)1504(Top 83%)
30K18.64 mi3.11 mi9216+1571572+221572+228674(Top 33%)1583(Top 14%)1583(Top 87%)
20M20.00 mi1.36 mi9140+761565+71565+78604(Top 32%)1637(Top 14%)1637(Top 90%)
21M21.00 mi1.00 mi9053+871552+131552+138326(Top 31%)1652(Top 14%)1652(Top 91%)
35K21.75 mi0.75 mi9048+51561-91561-98948(Top 34%)1885(Top 17%)1885(Top 104%)
23M23.00 mi1.25 mi8985+631562-11562-18528(Top 32%)1803(Top 16%)1803(Top 99%)
24M24.00 mi1.00 mi8959+261580-181580-188773(Top 33%)1985(Top 17%)1985(Top 109%)
40K24.85 mi0.85 mi8948+111592-121592-129455(Top 36%)2370(Top 21%)2370(Top 130%)
25.2M25.20 mi0.35 mi8936+121598-61598-69011(Top 34%)2237(Top 20%)2237(Top 123%)
Finish26.22 mi1.02 mi8914+221605-71605-78974(Top 34%)2225(Top 19%)2225(Top 122%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

9960

Females

1820

F45-49

1820

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9237

Females

1510

F45-49

1510

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

9960

Females

1820

F45-49

1820

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

9359

Females

1626

F45-49

1626

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8330

Females

1235

F45-49

1235

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

8853

Females

1504

F45-49

1504

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

8674

Females

1583

F45-49

1583

30K→20M

18.6 - 20.0 mi

Top 32%
×5story building
+64ft-50ft

Overall

8604

Females

1637

F45-49

1637

20M→21M

20.0 - 21.0 mi

Top 31%
×8story building
+106ft-24ft

Overall

8326

Females

1652

F45-49

1652

21M→35K

21.0 - 21.8 mi

Top 34%
×7story building
+17ft-86ft

Overall

8948

Females

1885

F45-49

1885

35K→23M

21.8 - 23.0 mi

Top 32%
×5story building
+23ft-63ft

Overall

8528

Females

1803

F45-49

1803

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8773

Females

1985

F45-49

1985

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9455

Females

2370

F45-49

2370

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9011

Females

2237

F45-49

2237

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2story building
+22ft-21ft

Overall

8974

Females

2225

F45-49

2225

Passing Analysis

Category:
Athletes Passed
2112*
Passed By
874
Net Change
+1238
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10152
5K → 10K649*110+539#10152#9613
10K → 15K131209-78#9613#9691
15K → 20K20293+109#9691#9582
20K → Half703+67#9582#9515
Half → 25K18846+142#9515#9373
25K → 30K245*88+157#9373#9216
30K → 20M11842+76#9216#9140
20M → 21M12134+87#9140#9053
21M → 35K4843+5#9053#9048
35K → 23M10441+63#9048#8985
23M → 24M8660+26#8985#8959
24M → 40K5241+11#8959#8948
40K → 25.2M3119+12#8948#8936
25.2M → Finish6745+22#8936#8914
TOTALS2112*874+1238

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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