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BOSTON MARATHON 2023

Xiaoying Shi

Bib: 27502•F

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:41
Rank: #23138
Start → 5K
9:53/mi
30:41 split
10K· 6.21 mi
59:32
Rank: #22558 (+580)
5K → 10K
9:17/mi
28:51 split
15K· 9.32 mi
1:27:41
Rank: #22003 (+555)
10K → 15K
9:04/mi
28:09 split
20K· 12.43 mi
1:56:38
Rank: #21759 (+244)
15K → 20K
9:19/mi
28:57 split
Half· 13.11 mi
2:02:55
Rank: #21743 (+16)
20K → Half
9:13/mi
6:17 split
25K· 15.53 mi
2:25:41
Rank: #21532 (+211)
Half → 25K
9:23/mi
22:46 split
30K· 18.64 mi
2:54:44
Rank: #21086 (+446)
25K → 30K
9:21/mi
29:03 split
20M
3:05:51
Rank: #20589 (+497)
30K → 20M
8:11/mi
11:07 split
21M
3:14:33
Rank: #20203 (+386)
20M → 21M
8:42/mi
8:42 split
35K· 21.75 mi
3:20:23
Rank: #19955 (+248)
21M → 35K
7:48/mi
5:50 split
23M
3:30:38
Rank: #19554 (+401)
35K → 23M
8:11/mi
10:15 split
24M
3:38:44
Rank: #19297 (+257)
23M → 24M
8:06/mi
8:06 split
40K· 24.85 mi
3:45:44
Rank: #19053 (+244)
24M → 40K
8:11/mi
7:00 split
25.2M
3:48:50
Rank: #18967 (+86)
40K → 25.2M
8:59/mi
3:06 split
Finish· 26.22 mi
3:56:56
Rank: #18760 (+207)
25.2M → Finish
7:57/mi
8:06 split

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time2:02:55
Pace9:23 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:54:01
Pace8:42 /mi
📊Negative Split: 7.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:5630:419:5330:41
9:53
-
10K
6.21 mi12:21:4759:329:3528:51
9:17
-0:36
15K
9.32 mi12:49:561:27:419:2428:09
9:04
-0:13
20K
12.43 mi13:18:531:56:389:2328:57
9:19
+0:15
Half
13.11 mi13:25:102:02:559:236:17
9:13
-0:06
25K
15.53 mi13:47:562:25:419:2322:46
9:23
+0:10
30K
18.64 mi14:16:592:54:449:2229:03
9:21
-0:02
20M
20.00 mi14:28:063:05:519:1811:07
8:11
-1:10
21M
21.00 mi14:36:483:14:339:168:42
8:42
+0:31
35K
21.75 mi14:42:383:20:239:135:50
7:48
-0:54
23M
23.00 mi14:52:533:30:389:0910:15
8:11
+0:23
24M
24.00 mi15:00:593:38:449:078:06
8:06
-0:05
40K
24.85 mi15:07:593:45:449:057:00
8:11
+0:05
25.2M
25.20 mi15:11:053:48:509:053:06
8:59
+0:48
Finish
26.22 mi15:19:113:56:569:038:06
7:57
-1:02

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

7:48 /mi

Average Pace

9:03 /mi

Slowest Pace

9:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

50:24

21% of race

Time at Steady Pace

1:15:05

32% of race

Time at Slower Pace

1:51:27

47% of race

Average Pace: 9:02 /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 mi11:52:5630:419:5330:41
9:53
#23138
10K
6.21 mi12:21:4759:329:3528:51
9:17
#22558
15K
9.32 mi12:49:561:27:419:2428:09
9:04
#22003
20K
12.43 mi13:18:531:56:389:2328:57
9:19
#21759
Half
13.11 mi13:25:102:02:559:236:17
9:13
#21743
25K
15.53 mi13:47:562:25:419:2322:46
9:23
#21532
30K
18.64 mi14:16:592:54:449:2229:03
9:21
#21086
20M
20.00 mi14:28:063:05:519:1811:07
8:11
#20589
21M
21.00 mi14:36:483:14:339:168:42
8:42
#20203
35K
21.75 mi14:42:383:20:239:135:50
7:48
#19955
23M
23.00 mi14:52:533:30:389:0910:15
8:11
#19554
24M
24.00 mi15:00:593:38:449:078:06
8:06
#19297
40K
24.85 mi15:07:593:45:449:057:00
8:11
#19053
25.2M
25.20 mi15:11:053:48:509:053:06
8:59
#18967
Finish
26.22 mi15:19:113:56:569:038:06
7:57
#18760
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi231389462946220774(Top 78%)8106(Top 71%)8106(Top 166%)
10K6.21 mi3.10 mi22558+5809124+3389124+33821889(Top 82%)8759(Top 77%)8759(Top 179%)
15K9.32 mi3.11 mi22003+5558840+2848840+28420774(Top 78%)8106(Top 71%)8106(Top 166%)
20K12.43 mi3.11 mi21759+2448689+1518689+15121021(Top 79%)8241(Top 72%)8241(Top 169%)
Half13.11 mi0.68 mi21743+168679+108679+1021200(Top 80%)8348(Top 73%)8348(Top 171%)
25K15.53 mi2.42 mi21532+2118564+1158564+11520483(Top 77%)7975(Top 70%)7975(Top 163%)
30K18.64 mi3.11 mi21086+4468334+2308334+23018837(Top 71%)7102(Top 62%)7102(Top 145%)
20M20.00 mi1.36 mi20589+4978070+2648070+26411614(Top 44%)3076(Top 27%)3076(Top 63%)
21M21.00 mi1.00 mi20203+3867864+2067864+20611716(Top 44%)3267(Top 29%)3267(Top 67%)
35K21.75 mi0.75 mi19955+2487726+1387726+13810726(Top 40%)2760(Top 24%)2760(Top 57%)
23M23.00 mi1.25 mi19554+4017498+2287498+22811147(Top 42%)3101(Top 27%)3101(Top 63%)
24M24.00 mi1.00 mi19297+2577357+1417357+14111996(Top 45%)3597(Top 31%)3597(Top 74%)
40K24.85 mi0.85 mi19053+2447230+1277230+12711338(Top 43%)3347(Top 29%)3347(Top 69%)
25.2M25.20 mi0.35 mi18967+867187+437187+4312604(Top 47%)4063(Top 36%)4063(Top 83%)
Finish26.22 mi1.02 mi18760+2077084+1037084+10311803(Top 44%)3623(Top 32%)3623(Top 74%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21story building
+97ft-345ft

Overall

20774

Females

8106

F18-39

8106

5K→10K

3.1 - 6.2 mi

Top 82%
×5story building
+79ft-138ft

Overall

21889

Females

8759

F18-39

8759

10K→15K

6.2 - 9.3 mi

Top 78%
×3story building
+67ft-78ft

Overall

20774

Females

8106

F18-39

8106

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

21021

Females

8241

F18-39

8241

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

21200

Females

8348

F18-39

8348

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

20483

Females

7975

F18-39

7975

25K→30K

15.5 - 18.6 mi

Top 71%
×9story building
+181ft-148ft

Overall

18837

Females

7102

F18-39

7102

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

11614

Females

3076

F18-39

3076

20M→21M

20.0 - 21.0 mi

Top 44%
×8story building
+106ft-24ft

Overall

11716

Females

3267

F18-39

3267

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

10726

Females

2760

F18-39

2760

35K→23M

21.8 - 23.0 mi

Top 42%
×5story building
+23ft-63ft

Overall

11147

Females

3101

F18-39

3101

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

11996

Females

3597

F18-39

3597

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

11338

Females

3347

F18-39

3347

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

12604

Females

4063

F18-39

4063

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2story building
+22ft-21ft

Overall

11803

Females

3623

F18-39

3623

Passing Analysis

Category:
Athletes Passed
4512
Passed By
134
Net Change
+4378
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23138
5K → 10K62545+580#23138#22558
10K → 15K5638+555#22558#22003
15K → 20K28440+244#22003#21759
20K → Half3115+16#21759#21743
Half → 25K22716+211#21743#21532
25K → 30K4537+446#21532#21086
30K → 20M4970+497#21086#20589
20M → 21M3860+386#20589#20203
21M → 35K2480+248#20203#19955
35K → 23M4010+401#19955#19554
23M → 24M2570+257#19554#19297
24M → 40K2451+244#19297#19053
40K → 25.2M882+86#19053#18967
25.2M → Finish2070+207#18967#18760
TOTALS4512134+4378
📊

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