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BOSTON MARATHON 2023

Kate Clark

Bib: 19707•F

TX

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F40-44)
#0 / 1878
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
8:29/mi
26:21
↑ 97↓ 3451.5%
10K· 6.21 mi
8:21/mi
52:17
↑ 79↓ 1380.4%
15K· 9.32 mi
8:25/mi
1:18:26
↑ 67↓ 78
20K· 12.43 mi
8:34/mi
1:45:03
↑ 106↓ 860.1%
Half· 13.11 mi
8:26/mi
1:50:48
↑ 19↓ 370.5%
25K· 15.53 mi
8:59/mi
2:12:35
↑ 66↓ 880.2%
30K· 18.64 mi
9:25/mi
2:41:50
↑ 181↓ 1480.2%
20M
9:27/mi
2:54:41
↑ 64↓ 500.2%
21M
10:41/mi
3:05:22
↑ 106↓ 241.6%
35K· 21.75 mi
9:00/mi
3:12:06
↑ 17↓ 861.7%
23M
9:25/mi
3:23:53
↑ 23↓ 630.6%
24M
8:57/mi
3:32:50
↓ 821.3%
40K· 24.85 mi
8:50/mi
3:40:23
↓ 200.3%
25.2M
10:38/mi
3:44:03
↑ 13↓ 160.2%
Finish· 26.22 mi
8:43/mi
3:52:56
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:48
Pace8:27 /mi
2nd Half
Distance13.11 mi
Time2:02:08
Pace9:19 /mi
📊Positive Split: 10.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:0826:218:2926:21
8:29
-
10K
6.21 mi11:44:0452:178:2525:56
8:21
-0:08
15K
9.32 mi12:10:131:18:268:2526:09
8:25
+0:04
20K
12.43 mi12:36:501:45:038:2726:37
8:34
+0:09
Half
13.11 mi12:42:351:50:488:275:45
8:26
-0:08
25K
15.53 mi13:04:222:12:358:3221:47
8:59
+0:33
30K
18.64 mi13:33:372:41:508:4129:15
9:25
+0:26
20M
20.00 mi13:46:282:54:418:4412:51
9:27
+0:02
21M
21.00 mi13:57:093:05:228:5010:41
10:41
+1:14
35K
21.75 mi14:03:533:12:068:506:44
9:00
-1:41
23M
23.00 mi14:15:403:23:538:5211:47
9:25
+0:25
24M
24.00 mi14:24:373:32:508:528:57
8:57
-0:28
40K
24.85 mi14:32:103:40:238:527:33
8:50
-0:07
25.2M
25.20 mi14:35:503:44:038:533:40
10:38
+1:48
Finish
26.22 mi14:44:433:52:568:538:53
8:43
-1:55

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

8:21 /mi

Average Pace

8:53 /mi

Slowest Pace

10:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:48

48% of race

Time at Steady Pace

53:54

23% of race

Time at Slower Pace

1:08:14

29% of race

Average Pace: 8:53 /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 mi11:18:0826:218:2926:21
8:29
#17449
10K
6.21 mi11:44:0452:178:2525:56
8:21
#17312
15K
9.32 mi12:10:131:18:268:2526:09
8:25
#17299
20K
12.43 mi12:36:501:45:038:2726:37
8:34
#17273
Half
13.11 mi12:42:351:50:488:275:45
8:26
#17267
25K
15.53 mi13:04:222:12:358:3221:47
8:59
#17545
30K
18.64 mi13:33:372:41:508:4129:15
9:25
#17864
20M
20.00 mi13:46:282:54:418:4412:51
9:27
#17929
21M
21.00 mi13:57:093:05:228:5010:41
10:41
#18132
35K
21.75 mi14:03:533:12:068:506:44
9:00
#18125
23M
23.00 mi14:15:403:23:538:5211:47
9:25
#18129
24M
24.00 mi14:24:373:32:508:528:57
8:57
#18088
40K
24.85 mi14:32:103:40:238:527:33
8:50
#17992
25.2M
25.20 mi14:35:503:44:038:533:40
10:38
#18025
Finish
26.22 mi14:44:433:52:568:538:53
8:43
#17964
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi174496223622317265(Top 65%)6090(Top 53%)6090(Top 324%)
10K6.21 mi3.10 mi17312+1376122+1016122+10117236(Top 65%)6025(Top 53%)6025(Top 321%)
15K9.32 mi3.11 mi17299+136096+266096+2617265(Top 65%)6090(Top 53%)6090(Top 324%)
20K12.43 mi3.11 mi17273+266095+16095+117294(Top 65%)6105(Top 53%)6105(Top 325%)
Half13.11 mi0.68 mi17267+66087+86087+817379(Top 65%)6125(Top 54%)6125(Top 326%)
25K15.53 mi2.42 mi17545-2786261-1746261-17418872(Top 71%)7055(Top 62%)7055(Top 376%)
30K18.64 mi3.11 mi17864-3196481-2206481-22019107(Top 72%)7252(Top 63%)7252(Top 386%)
20M20.00 mi1.36 mi17929-656545-646545-6418695(Top 70%)7127(Top 62%)7127(Top 379%)
21M21.00 mi1.00 mi18132-2036680-1356680-13520109(Top 76%)7981(Top 70%)7981(Top 425%)
35K21.75 mi0.75 mi18125+76678+26678+217929(Top 67%)6797(Top 60%)6797(Top 362%)
23M23.00 mi1.25 mi18129-46688-106688-1017985(Top 68%)6857(Top 60%)6857(Top 365%)
24M24.00 mi1.00 mi18088+416682+66682+617017(Top 64%)6367(Top 56%)6367(Top 339%)
40K24.85 mi0.85 mi17992+966635+476635+4715290(Top 57%)5472(Top 48%)5472(Top 291%)
25.2M25.20 mi0.35 mi18025-336658-236658-2319529(Top 73%)7794(Top 68%)7794(Top 415%)
Finish26.22 mi1.02 mi17964+616636+226636+2216606(Top 62%)6160(Top 54%)6160(Top 328%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

17265

Females

6090

F40-44

6090

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

17236

Females

6025

F40-44

6025

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

17265

Females

6090

F40-44

6090

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

17294

Females

6105

F40-44

6105

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

17379

Females

6125

F40-44

6125

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

18872

Females

7055

F40-44

7055

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

19107

Females

7252

F40-44

7252

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

18695

Females

7127

F40-44

7127

20M→21M

20.0 - 21.0 mi

Top 76%
×8story building
+106ft-24ft

Overall

20109

Females

7981

F40-44

7981

21M→35K

21.0 - 21.8 mi

Top 67%
×7story building
+17ft-86ft

Overall

17929

Females

6797

F40-44

6797

35K→23M

21.8 - 23.0 mi

Top 68%
×5story building
+23ft-63ft

Overall

17985

Females

6857

F40-44

6857

23M→24M

23.0 - 24.0 mi

Top 64%
×6story building
+12ft-82ft

Overall

17017

Females

6367

F40-44

6367

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

15290

Females

5472

F40-44

5472

40K→25.2M

24.9 - 25.2 mi

Top 73%
×1story
+13ft-16ft

Overall

19529

Females

7794

F40-44

7794

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

16606

Females

6160

F40-44

6160

Passing Analysis

Category:
Athletes Passed
1484
Passed By
1999
Net Change
-515
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17449
5K → 10K393256+137#17449#17312
10K → 15K193180+13#17312#17299
15K → 20K176150+26#17299#17273
20K → Half3529+6#17273#17267
Half → 25K62340-278#17267#17545
25K → 30K92411-319#17545#17864
30K → 20M72137-65#17864#17929
20M → 21M45248-203#17929#18132
21M → 35K5346+7#18132#18125
35K → 23M7377-4#18125#18129
23M → 24M7736+41#18129#18088
24M → 40K10812+96#18088#17992
40K → 25.2M1851-33#17992#18025
25.2M → Finish8726+61#18025#17964
TOTALS14841999-515
📊

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