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BOSTON MARATHON 2023

Yi Xiao

Bib: 18395•F

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 41%
Masters (Masters Women)
#0 / 6539
Top 29%
Division (F55-59)
#0 / 815
Top 10%
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
8:15/mi
25:37
↑ 97↓ 3451.5%
10K· 6.21 mi
8:08/mi
50:52
↑ 79↓ 1380.4%
15K· 9.32 mi
8:15/mi
1:16:31
↑ 67↓ 78
20K· 12.43 mi
8:26/mi
1:42:44
↑ 106↓ 860.1%
Half· 13.11 mi
8:17/mi
1:48:23
↑ 19↓ 370.5%
25K· 15.53 mi
8:16/mi
2:08:25
↑ 66↓ 880.2%
30K· 18.64 mi
8:33/mi
2:35:00
↑ 181↓ 1480.2%
20M
8:36/mi
2:46:41
↑ 64↓ 500.2%
21M
8:51/mi
2:55:32
↑ 106↓ 241.6%
35K· 21.75 mi
8:04/mi
3:01:34
↑ 17↓ 861.7%
23M
8:30/mi
3:12:12
↑ 23↓ 630.6%
24M
8:18/mi
3:20:30
↓ 821.3%
40K· 24.85 mi
8:16/mi
3:27:34
↓ 200.3%
25.2M
8:59/mi
3:30:40
↑ 13↓ 160.2%
Finish· 26.22 mi
8:07/mi
3:38:56
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:23
Pace8:16 /mi
2nd Half
Distance13.11 mi
Time1:50:33
Pace8:26 /mi
📊Positive Split: 2.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:3025:378:1525:37
8:15
-
10K
6.21 mi11:41:4550:528:1125:15
8:08
-0:07
15K
9.32 mi12:07:241:16:318:1325:39
8:15
+0:07
20K
12.43 mi12:33:371:42:448:1626:13
8:26
+0:11
Half
13.11 mi12:39:161:48:238:165:39
8:17
-0:09
25K
15.53 mi12:59:182:08:258:1620:02
8:16
-0:01
30K
18.64 mi13:25:532:35:008:1926:35
8:33
+0:17
20M
20.00 mi13:37:342:46:418:2011:41
8:36
+0:03
21M
21.00 mi13:46:252:55:328:228:51
8:51
+0:15
35K
21.75 mi13:52:273:01:348:216:02
8:04
-0:47
23M
23.00 mi14:03:053:12:128:2110:38
8:30
+0:26
24M
24.00 mi14:11:233:20:308:218:18
8:18
-0:12
40K
24.85 mi14:18:273:27:348:217:04
8:16
-0:02
25.2M
25.20 mi14:21:333:30:408:223:06
8:59
+0:43
Finish
26.22 mi14:29:493:38:568:218:16
8:07
-0:52

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

8:04 /mi

Average Pace

8:21 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:35:50

99% of race

Time at Steady Pace

3:06

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:21 /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 mi11:16:3025:378:1525:37
8:15
#15775
10K
6.21 mi11:41:4550:528:1125:15
8:08
#15724
15K
9.32 mi12:07:241:16:318:1325:39
8:15
#15900
20K
12.43 mi12:33:371:42:448:1626:13
8:26
#16030
Half
13.11 mi12:39:161:48:238:165:39
8:17
#16041
25K
15.53 mi12:59:182:08:258:1620:02
8:16
#15797
30K
18.64 mi13:25:532:35:008:1926:35
8:33
#15583
20M
20.00 mi13:37:342:46:418:2011:41
8:36
#15463
21M
21.00 mi13:46:252:55:328:228:51
8:51
#15266
35K
21.75 mi13:52:273:01:348:216:02
8:04
#15165
23M
23.00 mi14:03:053:12:128:2110:38
8:30
#15027
24M
24.00 mi14:11:233:20:308:218:18
8:18
#14928
40K
24.85 mi14:18:273:27:348:217:04
8:16
#14789
25.2M
25.20 mi14:21:333:30:408:223:06
8:59
#14746
Finish
26.22 mi14:29:493:38:568:218:16
8:07
#14673
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi157755135513516256(Top 61%)5441(Top 48%)5441(Top 668%)
10K6.21 mi3.10 mi15724+515108+275108+2715732(Top 59%)5099(Top 45%)5099(Top 626%)
15K9.32 mi3.11 mi15900-1765214-1065214-10616256(Top 61%)5441(Top 48%)5441(Top 668%)
20K12.43 mi3.11 mi16030-1305321-1075321-10716474(Top 62%)5629(Top 49%)5629(Top 691%)
Half13.11 mi0.68 mi16041-115337-165337-1616370(Top 61%)5502(Top 48%)5502(Top 675%)
25K15.53 mi2.42 mi15797+2445209+1285209+12814705(Top 55%)4651(Top 41%)4651(Top 571%)
30K18.64 mi3.11 mi15583+2145115+945115+9414657(Top 55%)4724(Top 41%)4724(Top 580%)
20M20.00 mi1.36 mi15463+1205068+475068+4714268(Top 54%)4580(Top 40%)4580(Top 562%)
21M21.00 mi1.00 mi15266+1974972+964972+9612582(Top 47%)3736(Top 33%)3736(Top 458%)
35K21.75 mi0.75 mi15165+1014924+484924+4812638(Top 47%)3799(Top 33%)3799(Top 466%)
23M23.00 mi1.25 mi15027+1384856+684856+6813202(Top 50%)4187(Top 37%)4187(Top 514%)
24M24.00 mi1.00 mi14928+994811+454811+4513278(Top 50%)4274(Top 37%)4274(Top 524%)
40K24.85 mi0.85 mi14789+1394755+564755+5611843(Top 44%)3590(Top 31%)3590(Top 440%)
25.2M25.20 mi0.35 mi14746+434737+184737+1812556(Top 47%)4015(Top 35%)4015(Top 493%)
Finish26.22 mi1.02 mi14673+734705+324705+3212890(Top 48%)4161(Top 36%)4161(Top 511%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

16256

Females

5441

F55-59

5441

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15732

Females

5099

F55-59

5099

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

16256

Females

5441

F55-59

5441

15K→20K

9.3 - 12.4 mi

Top 62%
×5story building
+106ft-86ft

Overall

16474

Females

5629

F55-59

5629

20K→Half

12.4 - 13.1 mi

Top 61%
×2story building
+19ft-37ft

Overall

16370

Females

5502

F55-59

5502

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

14705

Females

4651

F55-59

4651

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

14657

Females

4724

F55-59

4724

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

14268

Females

4580

F55-59

4580

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

12582

Females

3736

F55-59

3736

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12638

Females

3799

F55-59

3799

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

13202

Females

4187

F55-59

4187

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

13278

Females

4274

F55-59

4274

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

11843

Females

3590

F55-59

3590

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

12556

Females

4015

F55-59

4015

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

12890

Females

4161

F55-59

4161

Passing Analysis

Category:
Athletes Passed
2174
Passed By
1072
Net Change
+1102
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15775
5K → 10K323272+51#15775#15724
10K → 15K121297-176#15724#15900
15K → 20K124254-130#15900#16030
20K → Half2536-11#16030#16041
Half → 25K27329+244#16041#15797
25K → 30K29278+214#15797#15583
30K → 20M14525+120#15583#15463
20M → 21M2047+197#15463#15266
21M → 35K1076+101#15266#15165
35K → 23M15315+138#15165#15027
23M → 24M11516+99#15027#14928
24M → 40K1489+139#14928#14789
40K → 25.2M507+43#14789#14746
25.2M → Finish9421+73#14746#14673
TOTALS21741072+1102
📊

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