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BOSTON MARATHON 2023

Shujung Chiang

Bib: 17505•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 49%
Gender (Female)
#0 / 11423
Top 33%
Division (F18-39)
#0 / 4884
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
8:19/mi
25:49
↑ 97↓ 3451.5%
10K· 6.21 mi
8:03/mi
50:49
↑ 79↓ 1380.4%
15K· 9.32 mi
8:02/mi
1:15:46
↑ 67↓ 78
20K· 12.43 mi
8:00/mi
1:40:36
↑ 106↓ 860.1%
Half· 13.11 mi
7:43/mi
1:45:52
↑ 19↓ 370.5%
25K· 15.53 mi
7:55/mi
2:05:04
↑ 66↓ 880.2%
30K· 18.64 mi
8:06/mi
2:30:15
↑ 181↓ 1480.2%
20M
8:09/mi
2:41:20
↑ 64↓ 500.2%
21M
8:46/mi
2:50:06
↑ 106↓ 241.6%
35K· 21.75 mi
7:51/mi
2:55:58
↑ 17↓ 861.7%
23M
8:24/mi
3:06:29
↑ 23↓ 630.6%
24M
8:11/mi
3:14:40
↓ 821.3%
40K· 24.85 mi
8:16/mi
3:21:44
↓ 200.3%
25.2M
8:42/mi
3:24:44
↑ 13↓ 160.2%
Finish· 26.22 mi
8:00/mi
3:32:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:52
Pace8:05 /mi
2nd Half
Distance13.11 mi
Time1:47:01
Pace8:10 /mi
📊Positive Split: 1.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4425:498:1925:49
8:19
-
10K
6.21 mi11:43:4450:498:1125:00
8:03
-0:16
15K
9.32 mi12:08:411:15:468:0824:57
8:02
-0:01
20K
12.43 mi12:33:311:40:368:0624:50
8:00
-0:02
Half
13.11 mi12:38:471:45:528:055:16
7:43
-0:17
25K
15.53 mi12:57:592:05:048:0319:12
7:55
+0:12
30K
18.64 mi13:23:102:30:158:0425:11
8:06
+0:11
20M
20.00 mi13:34:152:41:208:0411:05
8:09
+0:03
21M
21.00 mi13:43:012:50:068:068:46
8:46
+0:37
35K
21.75 mi13:48:532:55:588:055:52
7:51
-0:55
23M
23.00 mi13:59:243:06:298:0610:31
8:24
+0:33
24M
24.00 mi14:07:353:14:408:078:11
8:11
-0:13
40K
24.85 mi14:14:393:21:448:077:04
8:16
+0:05
25.2M
25.20 mi14:17:393:24:448:073:00
8:42
+0:26
Finish
26.22 mi14:25:483:32:538:088:09
8:00
-0:42

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

7:43 /mi

Average Pace

8:08 /mi

Slowest Pace

8:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:21:07

94% of race

Time at Steady Pace

11:46

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:07 /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 mi11:18:4425:498:1925:49
8:19
#16221
10K
6.21 mi11:43:4450:498:1125:00
8:03
#15666
15K
9.32 mi12:08:411:15:468:0824:57
8:02
#15331
20K
12.43 mi12:33:311:40:368:0624:50
8:00
#14827
Half
13.11 mi12:38:471:45:528:055:16
7:43
#14693
25K
15.53 mi12:57:592:05:048:0319:12
7:55
#14278
30K
18.64 mi13:23:102:30:158:0425:11
8:06
#13774
20M
20.00 mi13:34:152:41:208:0411:05
8:09
#13567
21M
21.00 mi13:43:012:50:068:068:46
8:46
#13453
35K
21.75 mi13:48:532:55:588:055:52
7:51
#13340
23M
23.00 mi13:59:243:06:298:0610:31
8:24
#13265
24M
24.00 mi14:07:353:14:408:078:11
8:11
#13207
40K
24.85 mi14:14:393:21:448:077:04
8:16
#13129
25.2M
25.20 mi14:17:393:24:448:073:00
8:42
#13077
Finish
26.22 mi14:25:483:32:538:088:09
8:00
#13024
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi162215417541714647(Top 55%)4471(Top 39%)4471(Top 92%)
10K6.21 mi3.10 mi15666+5555068+3495068+34915147(Top 57%)4755(Top 42%)4755(Top 97%)
15K9.32 mi3.11 mi15331+3354872+1964872+19614647(Top 55%)4471(Top 39%)4471(Top 92%)
20K12.43 mi3.11 mi14827+5044571+3014571+30113376(Top 50%)3748(Top 33%)3748(Top 77%)
Half13.11 mi0.68 mi14693+1344491+804491+8012129(Top 46%)3007(Top 26%)3007(Top 62%)
25K15.53 mi2.42 mi14278+4154273+2184273+21812078(Top 45%)3128(Top 27%)3128(Top 64%)
30K18.64 mi3.11 mi13774+5044004+2694004+26911703(Top 44%)3023(Top 26%)3023(Top 62%)
20M20.00 mi1.36 mi13567+2073903+1013903+10111428(Top 43%)2963(Top 26%)2963(Top 61%)
21M21.00 mi1.00 mi13453+1143846+573846+5712094(Top 45%)3456(Top 30%)3456(Top 71%)
35K21.75 mi0.75 mi13340+1133794+523794+5211022(Top 41%)2899(Top 25%)2899(Top 59%)
23M23.00 mi1.25 mi13265+753775+193775+1912596(Top 47%)3847(Top 34%)3847(Top 79%)
24M24.00 mi1.00 mi13207+583771+43771+412505(Top 47%)3860(Top 34%)3860(Top 79%)
40K24.85 mi0.85 mi13129+783747+243747+2411826(Top 44%)3573(Top 31%)3573(Top 73%)
25.2M25.20 mi0.35 mi13077+523727+203727+2010834(Top 41%)3108(Top 27%)3108(Top 64%)
Finish26.22 mi1.02 mi13024+533713+143713+1412149(Top 46%)3778(Top 33%)3778(Top 77%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

14647

Females

4471

F18-39

4471

5K→10K

3.1 - 6.2 mi

Top 57%
×5story building
+79ft-138ft

Overall

15147

Females

4755

F18-39

4755

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

14647

Females

4471

F18-39

4471

15K→20K

9.3 - 12.4 mi

Top 50%
×5story building
+106ft-86ft

Overall

13376

Females

3748

F18-39

3748

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

12129

Females

3007

F18-39

3007

Half→25K

13.1 - 15.5 mi

Top 45%
×4story building
+66ft-88ft

Overall

12078

Females

3128

F18-39

3128

25K→30K

15.5 - 18.6 mi

Top 44%
×9story building
+181ft-148ft

Overall

11703

Females

3023

F18-39

3023

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

11428

Females

2963

F18-39

2963

20M→21M

20.0 - 21.0 mi

Top 45%
×8story building
+106ft-24ft

Overall

12094

Females

3456

F18-39

3456

21M→35K

21.0 - 21.8 mi

Top 41%
×7story building
+17ft-86ft

Overall

11022

Females

2899

F18-39

2899

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

12596

Females

3847

F18-39

3847

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

12505

Females

3860

F18-39

3860

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

11826

Females

3573

F18-39

3573

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

10834

Females

3108

F18-39

3108

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2story building
+22ft-21ft

Overall

12149

Females

3778

F18-39

3778

Passing Analysis

Category:
Athletes Passed
3629
Passed By
432
Net Change
+3197
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16221
5K → 10K664109+555#16221#15666
10K → 15K39560+335#15666#15331
15K → 20K52117+504#15331#14827
20K → Half1384+134#14827#14693
Half → 25K4227+415#14693#14278
25K → 30K51915+504#14278#13774
30K → 20M22013+207#13774#13567
20M → 21M15036+114#13567#13453
21M → 35K1218+113#13453#13340
35K → 23M12954+75#13340#13265
23M → 24M10042+58#13265#13207
24M → 40K10325+78#13207#13129
40K → 25.2M597+52#13129#13077
25.2M → Finish8835+53#13077#13024
TOTALS3629432+3197
📊

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