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BOSTON MARATHON 2023

Kirsten Kalkhurst Burbo

Bib: 23002•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Top 29%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:52
Rank: #20312
Start → 5K
27:52 | 8:58/mi
10K· 6.21 mi
55:54
Rank: #20638 (-326)
5K → 10K
28:02 | 9:01/mi
15K· 9.32 mi
1:23:49
Rank: #20526 (+112)
10K → 15K
27:55 | 8:59/mi
20K· 12.43 mi
1:51:26
Rank: #20198 (+328)
15K → 20K
27:37 | 8:53/mi
Half· 13.11 mi
1:57:21
Rank: #20133 (+65)
20K → Half
5:55 | 8:40/mi
25K· 15.53 mi
2:18:33
Rank: #19722 (+411)
Half → 25K
21:12 | 8:45/mi
30K· 18.64 mi
2:46:14
Rank: #19201 (+521)
25K → 30K
27:41 | 8:55/mi
20M
2:58:11
Rank: #18923 (+278)
30K → 20M
11:57 | 8:48/mi
21M
3:07:32
Rank: #18698 (+225)
20M → 21M
9:21 | 9:21/mi
35K· 21.75 mi
3:13:52
Rank: #18566 (+132)
21M → 35K
6:20 | 8:28/mi
23M
3:24:51
Rank: #18343 (+223)
35K → 23M
10:59 | 8:46/mi
24M
3:33:25
Rank: #18206 (+137)
23M → 24M
8:34 | 8:34/mi
40K· 24.85 mi
3:40:45
Rank: #18059 (+147)
24M → 40K
7:20 | 8:35/mi
25.2M
3:43:57
Rank: #18000 (+59)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:52:35
Rank: #17904 (+96)
25.2M → Finish
8:38 | 8:28/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:57:21
Pace8:57 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:55:14
Pace8:47 /mi
📊Negative Split: 1.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:3927:528:5827:52
8:58
-
10K
6.21 mi11:52:4155:549:0028:02
9:01
+0:03
15K
9.32 mi12:20:361:23:499:0027:55
8:59
-0:02
20K
12.43 mi12:48:131:51:268:5827:37
8:53
-0:06
Half
13.11 mi12:54:081:57:218:575:55
8:40
-0:13
25K
15.53 mi13:15:202:18:338:5521:12
8:45
+0:05
30K
18.64 mi13:43:012:46:148:5527:41
8:55
+0:10
20M
20.00 mi13:54:582:58:118:5511:57
8:48
-0:07
21M
21.00 mi14:04:193:07:328:569:21
9:21
+0:33
35K
21.75 mi14:10:393:13:528:556:20
8:28
-0:53
23M
23.00 mi14:21:383:24:518:5410:59
8:46
+0:18
24M
24.00 mi14:30:123:33:258:548:34
8:34
-0:12
40K
24.85 mi14:37:323:40:458:537:20
8:35
+0:01
25.2M
25.20 mi14:40:443:43:578:533:12
9:17
+0:42
Finish
26.22 mi14:49:223:52:358:538:38
8:28
-0:49

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

8:28 /mi

Average Pace

8:53 /mi

Slowest Pace

9:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:43:14

96% of race

Time at Steady Pace

9:21

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:52 /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 mi11:24:3927:528:5827:52
8:58
#20312
10K
6.21 mi11:52:4155:549:0028:02
9:01
#20638
15K
9.32 mi12:20:361:23:499:0027:55
8:59
#20526
20K
12.43 mi12:48:131:51:268:5827:37
8:53
#20198
Half
13.11 mi12:54:081:57:218:575:55
8:40
#20133
25K
15.53 mi13:15:202:18:338:5521:12
8:45
#19722
30K
18.64 mi13:43:012:46:148:5527:41
8:55
#19201
20M
20.00 mi13:54:582:58:118:5511:57
8:48
#18923
21M
21.00 mi14:04:193:07:328:569:21
9:21
#18698
35K
21.75 mi14:10:393:13:528:556:20
8:28
#18566
23M
23.00 mi14:21:383:24:518:5410:59
8:46
#18343
24M
24.00 mi14:30:123:33:258:548:34
8:34
#18206
40K
24.85 mi14:37:323:40:458:537:20
8:35
#18059
25.2M
25.20 mi14:40:443:43:578:533:12
9:17
#18000
Finish
26.22 mi14:49:223:52:358:538:38
8:28
#17904
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi203128002800220436(Top 77%)7918(Top 69%)7918(Top 972%)
10K6.21 mi3.10 mi20638-3268111-1098111-10920975(Top 79%)8247(Top 72%)8247(Top 1012%)
15K9.32 mi3.11 mi20526+1128028+838028+8320436(Top 77%)7918(Top 69%)7918(Top 972%)
20K12.43 mi3.11 mi20198+3287830+1987830+19819157(Top 72%)7185(Top 63%)7185(Top 882%)
Half13.11 mi0.68 mi20133+657789+417789+4118805(Top 71%)6962(Top 61%)6962(Top 854%)
25K15.53 mi2.42 mi19722+4117554+2357554+23517642(Top 66%)6365(Top 56%)6365(Top 781%)
30K18.64 mi3.11 mi19201+5217257+2977257+29716724(Top 63%)5909(Top 52%)5909(Top 725%)
20M20.00 mi1.36 mi18923+2787115+1427115+14215425(Top 58%)5235(Top 46%)5235(Top 642%)
21M21.00 mi1.00 mi18698+2256986+1296986+12915293(Top 57%)5230(Top 46%)5230(Top 642%)
35K21.75 mi0.75 mi18566+1326915+716915+7115178(Top 57%)5229(Top 46%)5229(Top 642%)
23M23.00 mi1.25 mi18343+2236814+1016814+10114862(Top 56%)5105(Top 45%)5105(Top 626%)
24M24.00 mi1.00 mi18206+1376744+706744+7014921(Top 56%)5198(Top 46%)5198(Top 638%)
40K24.85 mi0.85 mi18059+1476675+696675+6913871(Top 52%)4684(Top 41%)4684(Top 575%)
25.2M25.20 mi0.35 mi18000+596645+306645+3014191(Top 53%)4875(Top 43%)4875(Top 598%)
Finish26.22 mi1.02 mi17904+966595+506595+5015287(Top 57%)5430(Top 48%)5430(Top 666%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21stories
+97ft-345ft

Overall

20436

Females

7918

F55-59

7918

5K→10K

3.1 - 6.2 mi

Top 79%
×5stories
+79ft-138ft

Overall

20975

Females

8247

F55-59

8247

10K→15K

6.2 - 9.3 mi

Top 77%
×3stories
+67ft-78ft

Overall

20436

Females

7918

F55-59

7918

15K→20K

9.3 - 12.4 mi

Top 72%
×5stories
+106ft-86ft

Overall

19157

Females

7185

F55-59

7185

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

18805

Females

6962

F55-59

6962

Half→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

17642

Females

6365

F55-59

6365

25K→30K

15.5 - 18.6 mi

Top 63%
×9stories
+181ft-148ft

Overall

16724

Females

5909

F55-59

5909

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

15425

Females

5235

F55-59

5235

20M→21M

20.0 - 21.0 mi

Top 57%
×8stories
+106ft-24ft

Overall

15293

Females

5230

F55-59

5230

21M→35K

21.0 - 21.8 mi

Top 57%
×7stories
+17ft-86ft

Overall

15178

Females

5229

F55-59

5229

35K→23M

21.8 - 23.0 mi

Top 56%
×5stories
+23ft-63ft

Overall

14862

Females

5105

F55-59

5105

23M→24M

23.0 - 24.0 mi

Top 56%
×6stories
+12ft-82ft

Overall

14921

Females

5198

F55-59

5198

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13871

Females

4684

F55-59

4684

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

14191

Females

4875

F55-59

4875

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

15287

Females

5430

F55-59

5430

Passing Analysis

Category:
Athletes Passed
3122
Passed By
714
Net Change
+2408
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20312
5K → 10K155481-326#20312#20638
10K → 15K233121+112#20638#20526
15K → 20K36436+328#20526#20198
20K → Half738+65#20198#20133
Half → 25K4209+411#20133#19722
25K → 30K5298+521#19722#19201
30K → 20M2813+278#19201#18923
20M → 21M2294+225#18923#18698
21M → 35K1364+132#18698#18566
35K → 23M2329+223#18566#18343
23M → 24M1436+137#18343#18206
24M → 40K1492+147#18206#18059
40K → 25.2M623+59#18059#18000
25.2M → Finish11620+96#18000#17904
TOTALS3122714+2408
📊

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