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BOSTON MARATHON 2023

Janet Cheung

TX

Bib: 13578 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 49%
Gender (Female)
#0 / 11423
Top 33%
Masters (Masters Women)
#0 / 6539
Top 20%
Division (F40-44)
#0 / 1878
Top 36%
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:51/mi
24:23
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:48/mi
48:37
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:42/mi
1:12:33
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:45/mi
1:36:39
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:45/mi
1:41:56
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:56/mi
2:01:10
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:23/mi
2:27:14
↑ 181↓ 1480.2%
138 ft elev
20M
8:37/mi
2:38:56
↑ 64↓ 500.2%
148 ft elev
21M
9:44/mi
2:48:40
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:04/mi
2:54:42
↑ 17↓ 861.7%
156 ft elev
23M
8:24/mi
3:05:13
↑ 23↓ 630.6%
116 ft elev
24M
8:10/mi
3:13:23
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:54/mi
3:21:00
↓ 200.3%
20 ft elev
25.2M
9:20/mi
3:24:13
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
9:01/mi
3:33:24
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:41:567:47 /mi⚡ faster
2nd Half
1:51:288:30 /mi+9.4%
Positive split — 9.4% slower in the second half
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
24:237:513.11 mi24:23
7:51
-
10K
48:377:493.10 mi24:14
7:48
-0:03
15K
1:12:337:473.11 mi23:56
7:42
-0:06
20K
1:36:397:473.11 mi24:06
7:45
+0:03
Half(13.11 mi)
1:41:567:470.68 mi5:17
7:45
0:00
25K
2:01:107:482.42 mi19:14
7:56
+0:11
30K
2:27:147:543.11 mi26:04
8:23
+0:27
20M
2:38:567:571.36 mi11:42
8:37
+0:14
21M
2:48:408:021.00 mi9:44
9:44
+1:07
35K
2:54:428:020.75 mi6:02
8:04
-1:40
23M
3:05:138:031.25 mi10:31
8:24
+0:20
24M
3:13:238:031.00 mi8:10
8:10
-0:14
40K
3:21:008:050.85 mi7:37
8:54
+0:44
25.2M
3:24:138:060.35 mi3:13
9:20
+0:26
Finish(26.22 mi)
3:33:248:091.02 mi9:11
9:01
-0:19
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:42 /mi

Average Pace

8:09 /mi

Slowest Pace

9:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:41:56

48% of race

Time at Steady Pace

1:10:01

33% of race

Time at Slower Pace

41:27

19% of race

Average Pace: 8:08 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi12840334633461188928462846
10K3.10 mi12930-903405-593405-591312935093509
15K3.11 mi12530+4003193+2123193+2121188928462846
20K3.11 mi12191+3393031+1623031+1621139626342634
Half(13.11 mi)0.68 mi12201-103039-83039-81233231243124
25K2.42 mi12177+243038+13038+11218731893189
30K3.11 mi12448-2713224-1863224-1861363641114111
20M1.36 mi12603-1553336-1123336-1121432746064606
21M1.00 mi12919-3163538-2023538-2021697861716171
35K0.75 mi12894+253543-53543-51260837693769
23M1.25 mi12862+323548-53548-51259938503850
24M1.00 mi12824+383547+13547+11240838053805
40K0.85 mi12932-1083635-883635-881566756595659
25.2M0.35 mi12945-133653-183653-181434849184918
Finish(26.22 mi)1.02 mi13167-2223796-1433796-1431803969206920

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 45%
×21story building
+97ft-345ft

Overall

11889

Females

2846

F40-44

2846

5K→10K

3.1 - 6.2 mi

Top 49%
×5story building
+79ft-138ft

Overall

13129

Females

3509

F40-44

3509

10K→15K

6.2 - 9.3 mi

Top 45%
×3story building
+67ft-78ft

Overall

11889

Females

2846

F40-44

2846

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

11396

Females

2634

F40-44

2634

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

12332

Females

3124

F40-44

3124

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

12187

Females

3189

F40-44

3189

25K→30K

15.5 - 18.6 mi

Top 51%
×9story building
+181ft-148ft

Overall

13636

Females

4111

F40-44

4111

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

14327

Females

4606

F40-44

4606

20M→21M

20.0 - 21.0 mi

Top 64%
×8story building
+106ft-24ft

Overall

16978

Females

6171

F40-44

6171

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12608

Females

3769

F40-44

3769

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

12599

Females

3850

F40-44

3850

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

12408

Females

3805

F40-44

3805

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15667

Females

5659

F40-44

5659

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14348

Females

4918

F40-44

4918

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

18039

Females

6920

F40-44

6920

Passing Analysis

Category:
▼Net Change
0
0 passed by0 passed
SegmentMovementRank
Start → 5K-#12840
5K → 10K
360270-90
#12840 → #12930
10K → 15K
70470+400
#12930 → #12530
15K → 20K
41380+339
#12530 → #12191
20K → Half
4030-10
#12191 → #12201
Half → 25K
112136+24
#12201 → #12177
25K → 30K
402131-271
#12177 → #12448
30K → 20M
21055-155
#12448 → #12603
20M → 21M
34933-316
#12603 → #12919
21M → 35K
3257+25
#12919 → #12894
35K → 23M
68100+32
#12894 → #12862
23M → 24M
5290+38
#12862 → #12824
24M → 40K
14436-108
#12824 → #12932
40K → 25.2M
3825-13
#12932 → #12945
25.2M → Finish
23614-222
#12945 → #13167
TOTALS
21541827-327
#12840 → #13167

Passing Visualized

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