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BOSTON MARATHON 2023

Jennifer Chuck

Bib: 16816•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 38%
Gender (Female)
#0 / 11423
Top 19%
Division (F18-39)
#0 / 4884
Top 33%
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
7:39/mi
23:45
↑ 97↓ 3451.5%
10K· 6.21 mi
7:35/mi
47:20
↑ 79↓ 1380.4%
15K· 9.32 mi
7:30/mi
1:10:39
↑ 67↓ 78
20K· 12.43 mi
7:34/mi
1:34:09
↑ 106↓ 860.1%
Half· 13.11 mi
7:33/mi
1:39:18
↑ 19↓ 370.5%
25K· 15.53 mi
7:33/mi
1:57:37
↑ 66↓ 880.2%
30K· 18.64 mi
7:51/mi
2:22:01
↑ 181↓ 1480.2%
20M
7:58/mi
2:32:51
↑ 64↓ 500.2%
21M
8:23/mi
2:41:14
↑ 106↓ 241.6%
35K· 21.75 mi
7:45/mi
2:47:02
↑ 17↓ 861.7%
23M
8:02/mi
2:57:06
↑ 23↓ 630.6%
24M
7:48/mi
3:04:54
↓ 821.3%
40K· 24.85 mi
8:01/mi
3:11:45
↓ 200.3%
25.2M
8:54/mi
3:14:49
↑ 13↓ 160.2%
Finish· 26.22 mi
8:13/mi
3:23:11
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:18
Pace7:34 /mi
2nd Half
Distance13.11 mi
Time1:43:53
Pace7:55 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:0623:457:3923:45
7:39
-
10K
6.21 mi11:37:4147:207:3723:35
7:35
-0:04
15K
9.32 mi12:01:001:10:397:3523:19
7:30
-0:05
20K
12.43 mi12:24:301:34:097:3523:30
7:34
+0:04
Half
13.11 mi12:29:391:39:187:345:09
7:33
-0:01
25K
15.53 mi12:47:581:57:377:3418:19
7:33
0:00
30K
18.64 mi13:12:222:22:017:3724:24
7:51
+0:18
20M
20.00 mi13:23:122:32:517:3910:50
7:58
+0:07
21M
21.00 mi13:31:352:41:147:418:23
8:23
+0:25
35K
21.75 mi13:37:232:47:027:415:48
7:45
-0:38
23M
23.00 mi13:47:272:57:067:4210:04
8:02
+0:17
24M
24.00 mi13:55:153:04:547:427:48
7:48
-0:14
40K
24.85 mi14:02:063:11:457:436:51
8:01
+0:13
25.2M
25.20 mi14:05:103:14:497:443:04
8:54
+0:53
Finish
26.22 mi14:13:323:23:117:458:22
8:13
-0:41

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

7:30 /mi

Average Pace

7:45 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:11:44

94% of race

Time at Steady Pace

8:23

4% of race

Time at Slower Pace

3:04

2% of race

Average Pace: 7:45 /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 mi11:14:0623:457:3923:45
7:39
#10979
10K
6.21 mi11:37:4147:207:3723:35
7:35
#11085
15K
9.32 mi12:01:001:10:397:3523:19
7:30
#10766
20K
12.43 mi12:24:301:34:097:3523:30
7:34
#10485
Half
13.11 mi12:29:391:39:187:345:09
7:33
#10491
25K
15.53 mi12:47:581:57:377:3418:19
7:33
#10242
30K
18.64 mi13:12:222:22:017:3724:24
7:51
#10122
20M
20.00 mi13:23:122:32:517:3910:50
7:58
#10098
21M
21.00 mi13:31:352:41:147:418:23
8:23
#10038
35K
21.75 mi13:37:232:47:027:415:48
7:45
#10026
23M
23.00 mi13:47:272:57:067:4210:04
8:02
#10005
24M
24.00 mi13:55:153:04:547:427:48
7:48
#9982
40K
24.85 mi14:02:063:11:457:436:51
8:01
#9960
25.2M
25.20 mi14:05:103:14:497:443:04
8:54
#9973
Finish
26.22 mi14:13:323:23:117:458:22
8:13
#10095
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi109792316231610231(Top 38%)1952(Top 17%)1952(Top 40%)
10K6.21 mi3.10 mi11085-1062370-542370-5411256(Top 42%)2468(Top 22%)2468(Top 51%)
15K9.32 mi3.11 mi10766+3192215+1552215+15510231(Top 38%)1952(Top 17%)1952(Top 40%)
20K12.43 mi3.11 mi10485+2812064+1512064+1519826(Top 37%)1836(Top 16%)1836(Top 38%)
Half13.11 mi0.68 mi10491-62064206410663(Top 40%)2201(Top 19%)2201(Top 45%)
25K15.53 mi2.42 mi10242+2491968+961968+969221(Top 35%)1647(Top 14%)1647(Top 34%)
30K18.64 mi3.11 mi10122+1201951+171951+179779(Top 37%)2056(Top 18%)2056(Top 42%)
20M20.00 mi1.36 mi10098+241973-221973-2210084(Top 38%)2266(Top 20%)2266(Top 46%)
21M21.00 mi1.00 mi10038+601971+21971+29763(Top 37%)2272(Top 20%)2272(Top 47%)
35K21.75 mi0.75 mi10026+121985-141985-1410320(Top 39%)2509(Top 22%)2509(Top 51%)
23M23.00 mi1.25 mi10005+211992-71992-710055(Top 38%)2532(Top 22%)2532(Top 52%)
24M24.00 mi1.00 mi9982+232028-362028-369818(Top 37%)2503(Top 22%)2503(Top 51%)
40K24.85 mi0.85 mi9960+222043-152043-1510147(Top 38%)2719(Top 24%)2719(Top 56%)
25.2M25.20 mi0.35 mi9973-132068-252068-2511924(Top 45%)3662(Top 32%)3662(Top 75%)
Finish26.22 mi1.02 mi10095-1222145-772145-7713504(Top 51%)4459(Top 39%)4459(Top 91%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10231

Females

1952

F18-39

1952

5K→10K

3.1 - 6.2 mi

Top 42%
×5story building
+79ft-138ft

Overall

11256

Females

2468

F18-39

2468

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10231

Females

1952

F18-39

1952

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

9826

Females

1836

F18-39

1836

20K→Half

12.4 - 13.1 mi

Top 40%
×2story building
+19ft-37ft

Overall

10663

Females

2201

F18-39

2201

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9221

Females

1647

F18-39

1647

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

9779

Females

2056

F18-39

2056

30K→20M

18.6 - 20.0 mi

Top 38%
×5story building
+64ft-50ft

Overall

10084

Females

2266

F18-39

2266

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

9763

Females

2272

F18-39

2272

21M→35K

21.0 - 21.8 mi

Top 39%
×7story building
+17ft-86ft

Overall

10320

Females

2509

F18-39

2509

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10055

Females

2532

F18-39

2532

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9818

Females

2503

F18-39

2503

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10147

Females

2719

F18-39

2719

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

11924

Females

3662

F18-39

3662

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

13504

Females

4459

F18-39

4459

Passing Analysis

Category:
Athletes Passed
2040*
Passed By
1155
Net Change
+884
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10979
5K → 10K252358-106#10979#11085
10K → 15K37556+319#11085#10766
15K → 20K32847+281#10766#10485
20K → Half3238-6#10485#10491
Half → 25K27223+249#10491#10242
25K → 30K212*92+120#10242#10122
30K → 20M9571+24#10122#10098
20M → 21M11555+60#10098#10038
21M → 35K53*41+12#10038#10026
35K → 23M80*59+21#10026#10005
23M → 24M8663+23#10005#9982
24M → 40K7452+22#9982#9960
40K → 25.2M2740-13#9960#9973
25.2M → Finish39160-122#9973#10095
TOTALS2040*1155+884

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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