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BOSTON MARATHON 2023

Karen Zhong

Bib: 22413•F

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 45%
Division (F55-59)
#0 / 815
Top 21%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:33
Rank: #17887
Start → 5K
8:33/mi
26:33 split
10K· 6.21 mi
51:41
Rank: #16649 (+1238)
5K → 10K
8:05/mi
25:08 split
15K· 9.32 mi
1:17:23
Rank: #16536 (+113)
10K → 15K
8:16/mi
25:42 split
20K· 12.43 mi
1:43:50
Rank: #16664 (-128)
15K → 20K
8:31/mi
26:27 split
Half· 13.11 mi
1:49:32
Rank: #16669 (-5)
20K → Half
8:21/mi
5:42 split
25K· 15.53 mi
2:10:32
Rank: #16754 (-85)
Half → 25K
8:40/mi
21:00 split
30K· 18.64 mi
2:38:53
Rank: #16913 (-159)
25K → 30K
9:07/mi
28:21 split
20M
2:51:06
Rank: #16880 (+33)
30K → 20M
8:59/mi
12:13 split
21M
3:01:03
Rank: #16926 (-46)
20M → 21M
9:57/mi
9:57 split
35K· 21.75 mi
3:07:42
Rank: #16944 (-18)
21M → 35K
8:53/mi
6:39 split
23M
3:19:28
Rank: #17003 (-59)
35K → 23M
9:24/mi
11:46 split
24M
3:29:04
Rank: #17152 (-149)
23M → 24M
9:36/mi
9:36 split
40K· 24.85 mi
3:36:46
Rank: #17122 (+30)
24M → 40K
9:00/mi
7:42 split
25.2M
3:40:11
Rank: #17127 (-5)
40K → 25.2M
9:54/mi
3:25 split
Finish· 26.22 mi
3:49:06
Rank: #17131 (-4)
25.2M → Finish
8:45/mi
8:55 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:32
Pace8:21 /mi
2nd Half
Distance13.11 mi
Time1:59:34
Pace9:07 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:3526:338:3326:33
8:33
-
10K
6.21 mi11:47:4351:418:1925:08
8:05
-0:28
15K
9.32 mi12:13:251:17:238:1825:42
8:16
+0:11
20K
12.43 mi12:39:521:43:508:2126:27
8:31
+0:15
Half
13.11 mi12:45:341:49:328:215:42
8:21
-0:10
25K
15.53 mi13:06:342:10:328:2421:00
8:40
+0:19
30K
18.64 mi13:34:552:38:538:3128:21
9:07
+0:27
20M
20.00 mi13:47:082:51:068:3312:13
8:59
-0:08
21M
21.00 mi13:57:053:01:038:379:57
9:57
+0:58
35K
21.75 mi14:03:443:07:428:386:39
8:53
-1:04
23M
23.00 mi14:15:303:19:288:4011:46
9:24
+0:31
24M
24.00 mi14:25:063:29:048:439:36
9:36
+0:12
40K
24.85 mi14:32:483:36:468:437:42
9:00
-0:36
25.2M
25.20 mi14:36:133:40:118:443:25
9:54
+0:54
Finish
26.22 mi14:45:083:49:068:458:55
8:45
-1:09

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

8:05 /mi

Average Pace

8:45 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:49:32

48% of race

Time at Steady Pace

1:24:50

37% of race

Time at Slower Pace

34:44

15% of race

Average Pace: 8:44 /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 mi11:22:3526:338:3326:33
8:33
#17887
10K
6.21 mi11:47:4351:418:1925:08
8:05
#16649
15K
9.32 mi12:13:251:17:238:1825:42
8:16
#16536
20K
12.43 mi12:39:521:43:508:2126:27
8:31
#16664
Half
13.11 mi12:45:341:49:328:215:42
8:21
#16669
25K
15.53 mi13:06:342:10:328:2421:00
8:40
#16754
30K
18.64 mi13:34:552:38:538:3128:21
9:07
#16913
20M
20.00 mi13:47:082:51:068:3312:13
8:59
#16880
21M
21.00 mi13:57:053:01:038:379:57
9:57
#16926
35K
21.75 mi14:03:443:07:428:386:39
8:53
#16944
23M
23.00 mi14:15:303:19:288:4011:46
9:24
#17003
24M
24.00 mi14:25:063:29:048:439:36
9:36
#17152
40K
24.85 mi14:32:483:36:468:437:42
9:00
#17122
25.2M
25.20 mi14:36:133:40:118:443:25
9:54
#17127
Finish
26.22 mi14:45:083:49:068:458:55
8:45
#17131
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi178876478647816368(Top 61%)5516(Top 48%)5516(Top 677%)
10K6.21 mi3.10 mi16649+12385674+8045674+80415457(Top 58%)4943(Top 43%)4943(Top 607%)
15K9.32 mi3.11 mi16536+1135621+535621+5316368(Top 61%)5516(Top 48%)5516(Top 677%)
20K12.43 mi3.11 mi16664-1285716-955716-9516957(Top 64%)5904(Top 52%)5904(Top 724%)
Half13.11 mi0.68 mi16669-55727-115727-1116914(Top 64%)5860(Top 51%)5860(Top 719%)
25K15.53 mi2.42 mi16754-855803-765803-7617178(Top 65%)6106(Top 53%)6106(Top 749%)
30K18.64 mi3.11 mi16913-1595910-1075910-10717816(Top 67%)6535(Top 57%)6535(Top 802%)
20M20.00 mi1.36 mi16880+335903+75903+716510(Top 62%)5875(Top 51%)5875(Top 721%)
21M21.00 mi1.00 mi16926-465943-405943-4017873(Top 67%)6681(Top 58%)6681(Top 820%)
35K21.75 mi0.75 mi16944-185956-135956-1317405(Top 65%)6498(Top 57%)6498(Top 797%)
23M23.00 mi1.25 mi17003-596028-726028-7217940(Top 67%)6830(Top 60%)6830(Top 838%)
24M24.00 mi1.00 mi17152-1496129-1016129-10119575(Top 74%)7745(Top 68%)7745(Top 950%)
40K24.85 mi0.85 mi17122+306128+16128+116203(Top 61%)5974(Top 52%)5974(Top 733%)
25.2M25.20 mi0.35 mi17127-56138-106138-1017060(Top 64%)6452(Top 56%)6452(Top 792%)
Finish26.22 mi1.02 mi17131-46146-86146-816784(Top 63%)6247(Top 55%)6247(Top 767%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

16368

Females

5516

F55-59

5516

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

15457

Females

4943

F55-59

4943

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

16368

Females

5516

F55-59

5516

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

16957

Females

5904

F55-59

5904

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

16914

Females

5860

F55-59

5860

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

17178

Females

6106

F55-59

6106

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

17816

Females

6535

F55-59

6535

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

16510

Females

5875

F55-59

5875

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17873

Females

6681

F55-59

6681

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

17405

Females

6498

F55-59

6498

35K→23M

21.8 - 23.0 mi

Top 67%
×5story building
+23ft-63ft

Overall

17940

Females

6830

F55-59

6830

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

19575

Females

7745

F55-59

7745

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

16203

Females

5974

F55-59

5974

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

17060

Females

6452

F55-59

6452

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2story building
+22ft-21ft

Overall

16784

Females

6247

F55-59

6247

Passing Analysis

Category:
Athletes Passed
2392
Passed By
1636
Net Change
+756
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17887
5K → 10K129254+1238#17887#16649
10K → 15K263150+113#16649#16536
15K → 20K129257-128#16536#16664
20K → Half2833-5#16664#16669
Half → 25K103188-85#16669#16754
25K → 30K128287-159#16754#16913
30K → 20M9461+33#16913#16880
20M → 21M62108-46#16880#16926
21M → 35K3654-18#16926#16944
35K → 23M72131-59#16944#17003
23M → 24M24173-149#17003#17152
24M → 40K7444+30#17152#17122
40K → 25.2M2328-5#17122#17127
25.2M → Finish6468-4#17127#17131
TOTALS23921636+756
📊

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