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BOSTON MARATHON 2023

Katie Chu

Bib: 9950•F

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 20%
Gender (Female)
#0 / 11423
Top 4%
Division (F18-39)
#0 / 4884
Top 7%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:56
Rank: #6634
Start → 5K
7:04/mi
21:56 split
10K· 6.21 mi
44:01
Rank: #7009 (-375)
5K → 10K
7:06/mi
22:05 split
15K· 9.32 mi
1:05:55
Rank: #6928 (+81)
10K → 15K
7:03/mi
21:54 split
20K· 12.43 mi
1:27:44
Rank: #6697 (+231)
15K → 20K
7:01/mi
21:49 split
Half· 13.11 mi
1:32:32
Rank: #6701 (-4)
20K → Half
7:02/mi
4:48 split
25K· 15.53 mi
1:49:38
Rank: #6541 (+160)
Half → 25K
7:03/mi
17:06 split
30K· 18.64 mi
2:11:27
Rank: #6142 (+399)
25K → 30K
7:01/mi
21:49 split
20M
2:20:56
Rank: #5934 (+208)
30K → 20M
6:59/mi
9:29 split
21M
2:28:01
Rank: #5703 (+231)
20M → 21M
7:05/mi
7:05 split
35K· 21.75 mi
2:33:07
Rank: #5633 (+70)
21M → 35K
6:49/mi
5:06 split
23M
2:42:05
Rank: #5513 (+120)
35K → 23M
7:10/mi
8:58 split
24M
2:49:10
Rank: #5444 (+69)
23M → 24M
7:05/mi
7:05 split
40K· 24.85 mi
2:55:20
Rank: #5370 (+74)
24M → 40K
7:13/mi
6:10 split
25.2M
2:57:57
Rank: #5326 (+44)
40K → 25.2M
7:35/mi
2:37 split
Finish· 26.22 mi
3:04:55
Rank: #5242 (+84)
25.2M → Finish
6:50/mi
6:58 split

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:32:32
Pace7:04 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:32:23
Pace7:03 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:2421:567:0421:56
7:04
-
10K
6.21 mi11:09:2944:017:0522:05
7:06
+0:02
15K
9.32 mi11:31:231:05:557:0421:54
7:03
-0:03
20K
12.43 mi11:53:121:27:447:0421:49
7:01
-0:02
Half
13.11 mi11:58:001:32:327:044:48
7:02
+0:01
25K
15.53 mi12:15:061:49:387:0317:06
7:03
+0:01
30K
18.64 mi12:36:552:11:277:0321:49
7:01
-0:02
20M
20.00 mi12:46:242:20:567:039:29
6:59
-0:02
21M
21.00 mi12:53:292:28:017:037:05
7:05
+0:06
35K
21.75 mi12:58:352:33:077:025:06
6:49
-0:16
23M
23.00 mi13:07:332:42:057:038:58
7:10
+0:21
24M
24.00 mi13:14:382:49:107:037:05
7:05
-0:05
40K
24.85 mi13:20:482:55:207:036:10
7:13
+0:08
25.2M
25.20 mi13:23:252:57:577:042:37
7:35
+0:22
Finish
26.22 mi13:30:233:04:557:036:58
6:50
-0:45

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

6:49 /mi

Average Pace

7:03 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:02:18

99% of race

Time at Steady Pace

2:37

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:03 /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 mi10:47:2421:567:0421:56
7:04
#6634
10K
6.21 mi11:09:2944:017:0522:05
7:06
#7009
15K
9.32 mi11:31:231:05:557:0421:54
7:03
#6928
20K
12.43 mi11:53:121:27:447:0421:49
7:01
#6697
Half
13.11 mi11:58:001:32:327:044:48
7:02
#6701
25K
15.53 mi12:15:061:49:387:0317:06
7:03
#6541
30K
18.64 mi12:36:552:11:277:0321:49
7:01
#6142
20M
20.00 mi12:46:242:20:567:039:29
6:59
#5934
21M
21.00 mi12:53:292:28:017:037:05
7:05
#5703
35K
21.75 mi12:58:352:33:077:025:06
6:49
#5633
23M
23.00 mi13:07:332:42:057:038:58
7:10
#5513
24M
24.00 mi13:14:382:49:107:037:05
7:05
#5444
40K
24.85 mi13:20:482:55:207:036:10
7:13
#5370
25.2M
25.20 mi13:23:252:57:577:042:37
7:35
#5326
Finish
26.22 mi13:30:233:04:557:036:58
6:50
#5242
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi66346346346860(Top 26%)713(Top 6%)713(Top 15%)
10K6.21 mi3.10 mi7009-375736-102736-1027505(Top 28%)889(Top 8%)889(Top 18%)
15K9.32 mi3.11 mi6928+81715+21715+216860(Top 26%)713(Top 6%)713(Top 15%)
20K12.43 mi3.11 mi6697+231675+40675+406126(Top 23%)554(Top 5%)554(Top 11%)
Half13.11 mi0.68 mi6701-4673+2673+26790(Top 26%)687(Top 6%)687(Top 14%)
25K15.53 mi2.42 mi6541+160649+24649+245875(Top 22%)518(Top 5%)518(Top 11%)
30K18.64 mi3.11 mi6142+399564+85564+854510(Top 17%)333(Top 3%)333(Top 7%)
20M20.00 mi1.36 mi5934+208524+40524+403937(Top 15%)279(Top 2%)279(Top 6%)
21M21.00 mi1.00 mi5703+231477+47477+472585(Top 10%)151(Top 1%)151(Top 3%)
35K21.75 mi0.75 mi5633+70466+11466+114359(Top 16%)368(Top 3%)368(Top 8%)
23M23.00 mi1.25 mi5513+120460+6460+64626(Top 17%)446(Top 4%)446(Top 9%)
24M24.00 mi1.00 mi5444+69459+1459+15136(Top 19%)601(Top 5%)601(Top 12%)
40K24.85 mi0.85 mi5370+744594594979(Top 19%)637(Top 6%)637(Top 13%)
25.2M25.20 mi0.35 mi5326+44457+2457+24386(Top 16%)541(Top 5%)541(Top 11%)
Finish26.22 mi1.02 mi5242+84443+14443+144303(Top 16%)528(Top 5%)528(Top 11%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21story building
+97ft-345ft

Overall

6860

Females

713

F18-39

713

5K→10K

3.1 - 6.2 mi

Top 28%
×5story building
+79ft-138ft

Overall

7505

Females

889

F18-39

889

10K→15K

6.2 - 9.3 mi

Top 26%
×3story building
+67ft-78ft

Overall

6860

Females

713

F18-39

713

15K→20K

9.3 - 12.4 mi

Top 23%
×5story building
+106ft-86ft

Overall

6126

Females

554

F18-39

554

20K→Half

12.4 - 13.1 mi

Top 26%
×2story building
+19ft-37ft

Overall

6790

Females

687

F18-39

687

Half→25K

13.1 - 15.5 mi

Top 22%
×4story building
+66ft-88ft

Overall

5875

Females

518

F18-39

518

25K→30K

15.5 - 18.6 mi

Top 17%
×9story building
+181ft-148ft

Overall

4510

Females

333

F18-39

333

30K→20M

18.6 - 20.0 mi

Top 15%
×5story building
+64ft-50ft

Overall

3937

Females

279

F18-39

279

20M→21M

20.0 - 21.0 mi

Top 10%
×8story building
+106ft-24ft

Overall

2585

Females

151

F18-39

151

21M→35K

21.0 - 21.8 mi

Top 16%
×7story building
+17ft-86ft

Overall

4359

Females

368

F18-39

368

35K→23M

21.8 - 23.0 mi

Top 17%
×5story building
+23ft-63ft

Overall

4626

Females

446

F18-39

446

23M→24M

23.0 - 24.0 mi

Top 19%
×6story building
+12ft-82ft

Overall

5136

Females

601

F18-39

601

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

4979

Females

637

F18-39

637

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4386

Females

541

F18-39

541

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2story building
+22ft-21ft

Overall

4303

Females

528

F18-39

528

Passing Analysis

Category:
Athletes Passed
2037
Passed By
645
Net Change
+1392
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6634
5K → 10K66441-375#6634#7009
10K → 15K16887+81#7009#6928
15K → 20K24514+231#6928#6697
20K → Half2024-4#6697#6701
Half → 25K17313+160#6701#6541
25K → 30K4012+399#6541#6142
30K → 20M2113+208#6142#5934
20M → 21M2310+231#5934#5703
21M → 35K744+70#5703#5633
35K → 23M13313+120#5633#5513
23M → 24M8112+69#5513#5444
24M → 40K9117+74#5444#5370
40K → 25.2M462+44#5370#5326
25.2M → Finish9713+84#5326#5242
TOTALS2037645+1392
📊

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