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BOSTON MARATHON 2023

Katie Kirchner

Bib: 21718•F

MD

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 47%
Division (F50-54)
#0 / 1207
Top 42%
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
8:41/mi
27:00
↑ 97↓ 3451.5%
10K· 6.21 mi
8:28/mi
53:17
↑ 79↓ 1380.4%
15K· 9.32 mi
8:24/mi
1:19:22
↑ 67↓ 78
20K· 12.43 mi
8:25/mi
1:45:31
↑ 106↓ 860.1%
Half· 13.11 mi
8:12/mi
1:51:07
↑ 19↓ 370.5%
25K· 15.53 mi
8:31/mi
2:11:46
↑ 66↓ 880.2%
30K· 18.64 mi
9:01/mi
2:39:47
↑ 181↓ 1480.2%
20M
9:09/mi
2:52:13
↑ 64↓ 500.2%
21M
10:05/mi
3:02:18
↑ 106↓ 241.6%
35K· 21.75 mi
9:19/mi
3:09:16
↑ 17↓ 861.7%
23M
9:20/mi
3:20:57
↑ 23↓ 630.6%
24M
8:57/mi
3:29:54
↓ 821.3%
40K· 24.85 mi
9:11/mi
3:37:45
↓ 200.3%
25.2M
10:29/mi
3:41:22
↑ 13↓ 160.2%
Finish· 26.22 mi
8:56/mi
3:50:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:07
Pace8:29 /mi
2nd Half
Distance13.11 mi
Time1:59:21
Pace9:06 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:5627:008:4127:00
8:41
-
10K
6.21 mi11:49:1353:178:3526:17
8:28
-0:13
15K
9.32 mi12:15:181:19:228:3126:05
8:24
-0:04
20K
12.43 mi12:41:271:45:318:2926:09
8:25
+0:01
Half
13.11 mi12:47:031:51:078:295:36
8:12
-0:13
25K
15.53 mi13:07:422:11:468:2920:39
8:31
+0:19
30K
18.64 mi13:35:432:39:478:3428:01
9:01
+0:30
20M
20.00 mi13:48:092:52:138:3712:26
9:09
+0:08
21M
21.00 mi13:58:143:02:188:4110:05
10:05
+0:56
35K
21.75 mi14:05:123:09:168:426:58
9:19
-0:46
23M
23.00 mi14:16:533:20:578:4411:41
9:20
+0:01
24M
24.00 mi14:25:503:29:548:458:57
8:57
-0:23
40K
24.85 mi14:33:413:37:458:467:51
9:11
+0:14
25.2M
25.20 mi14:37:183:41:228:473:37
10:29
+1:18
Finish
26.22 mi14:46:243:50:288:489:06
8:56
-1:33

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

8:48 /mi

Slowest Pace

10:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:46

45% of race

Time at Steady Pace

1:33:21

41% of race

Time at Slower Pace

32:21

14% of race

Average Pace: 8:47 /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 mi11:22:5627:008:4127:00
8:41
#18813
10K
6.21 mi11:49:1353:178:3526:17
8:28
#18371
15K
9.32 mi12:15:181:19:228:3126:05
8:24
#17943
20K
12.43 mi12:41:271:45:318:2926:09
8:25
#17492
Half
13.11 mi12:47:031:51:078:295:36
8:12
#17407
25K
15.53 mi13:07:422:11:468:2920:39
8:31
#17226
30K
18.64 mi13:35:432:39:478:3428:01
9:01
#17193
20M
20.00 mi13:48:092:52:138:3712:26
9:09
#17204
21M
21.00 mi13:58:143:02:188:4110:05
10:05
#17276
35K
21.75 mi14:05:123:09:168:426:58
9:19
#17356
23M
23.00 mi14:16:533:20:578:4411:41
9:20
#17391
24M
24.00 mi14:25:503:29:548:458:57
8:57
#17378
40K
24.85 mi14:33:413:37:458:467:51
9:11
#17362
25.2M
25.20 mi14:37:183:41:228:473:37
10:29
#17420
Finish
26.22 mi14:46:243:50:288:489:06
8:56
#17438
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi188137081708117133(Top 64%)6009(Top 53%)6009(Top 498%)
10K6.21 mi3.10 mi18371+4426740+3416740+34118008(Top 68%)6480(Top 57%)6480(Top 537%)
15K9.32 mi3.11 mi17943+4286489+2516489+25117133(Top 64%)6009(Top 53%)6009(Top 498%)
20K12.43 mi3.11 mi17492+4516212+2776212+27716364(Top 61%)5569(Top 49%)5569(Top 461%)
Half13.11 mi0.68 mi17407+856165+476165+4715939(Top 60%)5271(Top 46%)5271(Top 437%)
25K15.53 mi2.42 mi17226+1816074+916074+9116329(Top 61%)5636(Top 49%)5636(Top 467%)
30K18.64 mi3.11 mi17193+336073+16073+117277(Top 65%)6232(Top 55%)6232(Top 516%)
20M20.00 mi1.36 mi17204-116100-276100-2717322(Top 65%)6349(Top 56%)6349(Top 526%)
21M21.00 mi1.00 mi17276-726160-606160-6018327(Top 69%)6946(Top 61%)6946(Top 575%)
35K21.75 mi0.75 mi17356-806217-576217-5719218(Top 72%)7501(Top 66%)7501(Top 621%)
23M23.00 mi1.25 mi17391-356254-376254-3717673(Top 66%)6671(Top 58%)6671(Top 553%)
24M24.00 mi1.00 mi17378+136256-26256-217014(Top 64%)6364(Top 56%)6364(Top 527%)
40K24.85 mi0.85 mi17362+166262-66262-617045(Top 64%)6430(Top 56%)6430(Top 533%)
25.2M25.20 mi0.35 mi17420-586303-416303-4119077(Top 72%)7538(Top 66%)7538(Top 625%)
Finish26.22 mi1.02 mi17438-186323-206323-2017641(Top 66%)6726(Top 59%)6726(Top 557%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

17133

Females

6009

F50-54

6009

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

18008

Females

6480

F50-54

6480

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

17133

Females

6009

F50-54

6009

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

16364

Females

5569

F50-54

5569

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

15939

Females

5271

F50-54

5271

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

16329

Females

5636

F50-54

5636

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

17277

Females

6232

F50-54

6232

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

17322

Females

6349

F50-54

6349

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

18327

Females

6946

F50-54

6946

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

19218

Females

7501

F50-54

7501

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

17673

Females

6671

F50-54

6671

23M→24M

23.0 - 24.0 mi

Top 64%
×6story building
+12ft-82ft

Overall

17014

Females

6364

F50-54

6364

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

17045

Females

6430

F50-54

6430

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

19077

Females

7538

F50-54

7538

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17641

Females

6726

F50-54

6726

Passing Analysis

Category:
Athletes Passed
2523
Passed By
1148
Net Change
+1375
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18813
5K → 10K634192+442#18813#18371
10K → 15K47749+428#18371#17943
15K → 20K47524+451#17943#17492
20K → Half894+85#17492#17407
Half → 25K21433+181#17407#17226
25K → 30K187154+33#17226#17193
30K → 20M7182-11#17193#17204
20M → 21M69141-72#17204#17276
21M → 35K31111-80#17276#17356
35K → 23M71106-35#17356#17391
23M → 24M6855+13#17391#17378
24M → 40K6448+16#17378#17362
40K → 25.2M1472-58#17362#17420
25.2M → Finish5977-18#17420#17438
TOTALS25231148+1375
📊

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