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BOSTON MARATHON 2023

Kerry Colford

Bib: 16837•F

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 26%
Gender (Female)
#0 / 11423
Top 8%
Division (F18-39)
#0 / 4884
Top 15%
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
7:50/mi
24:19
↑ 97↓ 3451.5%
10K· 6.21 mi
7:32/mi
47:42
↑ 79↓ 1380.4%
15K· 9.32 mi
7:19/mi
1:10:27
↑ 67↓ 78
20K· 12.43 mi
7:12/mi
1:32:49
↑ 106↓ 860.1%
Half· 13.11 mi
7:04/mi
1:37:38
↑ 19↓ 370.5%
25K· 15.53 mi
7:13/mi
1:55:08
↑ 66↓ 880.2%
30K· 18.64 mi
7:19/mi
2:17:52
↑ 181↓ 1480.2%
20M
7:17/mi
2:27:46
↑ 64↓ 500.2%
21M
7:31/mi
2:35:17
↑ 106↓ 241.6%
35K· 21.75 mi
6:56/mi
2:40:28
↑ 17↓ 861.7%
23M
7:17/mi
2:49:35
↑ 23↓ 630.6%
24M
7:14/mi
2:56:49
↓ 821.3%
40K· 24.85 mi
6:53/mi
3:02:42
↓ 200.3%
25.2M
7:29/mi
3:05:17
↑ 13↓ 160.2%
Finish· 26.22 mi
6:53/mi
3:12:18
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:37:38
Pace7:27 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:34:40
Pace7:13 /mi
📊Negative Split: 3.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:4124:197:5024:19
7:50
-
10K
6.21 mi11:40:0447:427:4123:23
7:32
-0:18
15K
9.32 mi12:02:491:10:277:3422:45
7:19
-0:13
20K
12.43 mi12:25:111:32:497:2822:22
7:12
-0:07
Half
13.11 mi12:30:001:37:387:274:49
7:04
-0:08
25K
15.53 mi12:47:301:55:087:2517:30
7:13
+0:09
30K
18.64 mi13:10:142:17:527:2422:44
7:19
+0:06
20M
20.00 mi13:20:082:27:467:239:54
7:17
-0:02
21M
21.00 mi13:27:392:35:177:247:31
7:31
+0:14
35K
21.75 mi13:32:502:40:287:235:11
6:56
-0:35
23M
23.00 mi13:41:572:49:357:229:07
7:17
+0:21
24M
24.00 mi13:49:112:56:497:227:14
7:14
-0:03
40K
24.85 mi13:55:043:02:427:215:53
6:53
-0:21
25.2M
25.20 mi13:57:393:05:177:212:35
7:29
+0:36
Finish
26.22 mi14:04:403:12:187:207:01
6:53
-0:36

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

7:20 /mi

Slowest Pace

7:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:59

87% of race

Time at Steady Pace

24:19

13% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:20 /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 mi11:16:4124:197:5024:19
7:50
#12610
10K
6.21 mi11:40:0447:427:4123:23
7:32
#11585
15K
9.32 mi12:02:491:10:277:3422:45
7:19
#10575
20K
12.43 mi12:25:111:32:497:2822:22
7:12
#9557
Half
13.11 mi12:30:001:37:387:274:49
7:04
#9411
25K
15.53 mi12:47:301:55:087:2517:30
7:13
#8912
30K
18.64 mi13:10:142:17:527:2422:44
7:19
#8327
20M
20.00 mi13:20:082:27:467:239:54
7:17
#8087
21M
21.00 mi13:27:392:35:177:247:31
7:31
#7828
35K
21.75 mi13:32:502:40:287:235:11
6:56
#7695
23M
23.00 mi13:41:572:49:357:229:07
7:17
#7481
24M
24.00 mi13:49:112:56:497:227:14
7:14
#7392
40K
24.85 mi13:55:043:02:427:215:53
6:53
#7213
25.2M
25.20 mi13:57:393:05:177:212:35
7:29
#7130
Finish
26.22 mi14:04:403:12:187:207:01
6:53
#6968
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi12610321632168750(Top 33%)1340(Top 12%)1340(Top 27%)
10K6.21 mi3.10 mi11585+10252643+5732643+57310669(Top 40%)2133(Top 19%)2133(Top 44%)
15K9.32 mi3.11 mi10575+10102106+5372106+5378750(Top 33%)1340(Top 12%)1340(Top 27%)
20K12.43 mi3.11 mi9557+10181653+4531653+4537104(Top 27%)808(Top 7%)808(Top 17%)
Half13.11 mi0.68 mi9411+1461599+541599+546974(Top 26%)758(Top 7%)758(Top 16%)
25K15.53 mi2.42 mi8912+4991416+1831416+1836792(Top 26%)783(Top 7%)783(Top 16%)
30K18.64 mi3.11 mi8327+5851240+1761240+1766134(Top 23%)666(Top 6%)666(Top 14%)
20M20.00 mi1.36 mi8087+2401164+761164+765585(Top 21%)598(Top 5%)598(Top 12%)
21M21.00 mi1.00 mi7828+2591082+821082+824701(Top 18%)452(Top 4%)452(Top 9%)
35K21.75 mi0.75 mi7695+1331045+371045+375004(Top 19%)519(Top 5%)519(Top 11%)
23M23.00 mi1.25 mi7481+214998+47998+475243(Top 20%)602(Top 5%)602(Top 12%)
24M24.00 mi1.00 mi7392+89986+12986+125975(Top 22%)883(Top 8%)883(Top 18%)
40K24.85 mi0.85 mi7213+179943+43943+433273(Top 12%)281(Top 2%)281(Top 6%)
25.2M25.20 mi0.35 mi7130+83923+20923+203950(Top 15%)439(Top 4%)439(Top 9%)
Finish26.22 mi1.02 mi6968+162898+25898+254580(Top 17%)600(Top 5%)600(Top 12%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

8750

Females

1340

F18-39

1340

5K→10K

3.1 - 6.2 mi

Top 40%
×5story building
+79ft-138ft

Overall

10669

Females

2133

F18-39

2133

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

8750

Females

1340

F18-39

1340

15K→20K

9.3 - 12.4 mi

Top 27%
×5story building
+106ft-86ft

Overall

7104

Females

808

F18-39

808

20K→Half

12.4 - 13.1 mi

Top 26%
×2story building
+19ft-37ft

Overall

6974

Females

758

F18-39

758

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

6792

Females

783

F18-39

783

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6134

Females

666

F18-39

666

30K→20M

18.6 - 20.0 mi

Top 21%
×5story building
+64ft-50ft

Overall

5585

Females

598

F18-39

598

20M→21M

20.0 - 21.0 mi

Top 18%
×8story building
+106ft-24ft

Overall

4701

Females

452

F18-39

452

21M→35K

21.0 - 21.8 mi

Top 19%
×7story building
+17ft-86ft

Overall

5004

Females

519

F18-39

519

35K→23M

21.8 - 23.0 mi

Top 20%
×5story building
+23ft-63ft

Overall

5243

Females

602

F18-39

602

23M→24M

23.0 - 24.0 mi

Top 22%
×6story building
+12ft-82ft

Overall

5975

Females

883

F18-39

883

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3273

Females

281

F18-39

281

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

3950

Females

439

F18-39

439

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2story building
+22ft-21ft

Overall

4580

Females

600

F18-39

600

Passing Analysis

Category:
Athletes Passed
5742*
Passed By
100
Net Change
+5642
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12610
5K → 10K107348+1025#12610#11585
10K → 15K102212+1010#11585#10575
15K → 20K1018*0+1018#10575#9557
20K → Half1471+146#9557#9411
Half → 25K4990+499#9411#8912
25K → 30K5905+585#8912#8327
30K → 20M2433+240#8327#8087
20M → 21M2601+259#8087#7828
21M → 35K1330+133#7828#7695
35K → 23M2195+214#7695#7481
23M → 24M10617+89#7481#7392
24M → 40K1834+179#7392#7213
40K → 25.2M830+83#7213#7130
25.2M → Finish1664+162#7130#6968
TOTALS5742*100+5642

* 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