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BOSTON MARATHON 2023

Shiaau Rurng Li

Bib: 19849•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 42%
Masters (Masters Women)
#0 / 6539
Top 30%
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
7:58/mi
24:45
↑ 97↓ 3451.5%
10K· 6.21 mi
7:50/mi
49:06
↑ 79↓ 1380.4%
15K· 9.32 mi
7:54/mi
1:13:38
↑ 67↓ 78
20K· 12.43 mi
8:08/mi
1:38:54
↑ 106↓ 860.1%
Half· 13.11 mi
7:58/mi
1:44:20
↑ 19↓ 370.5%
25K· 15.53 mi
8:05/mi
2:03:57
↑ 66↓ 880.2%
30K· 18.64 mi
8:38/mi
2:30:47
↑ 181↓ 1480.2%
20M
9:06/mi
2:43:08
↑ 64↓ 500.2%
21M
9:06/mi
2:52:14
↑ 106↓ 241.6%
35K· 21.75 mi
8:35/mi
2:58:39
↑ 17↓ 861.7%
23M
9:09/mi
3:10:06
↑ 23↓ 630.6%
24M
8:53/mi
3:18:59
↓ 821.3%
40K· 24.85 mi
9:07/mi
3:26:47
↓ 200.3%
25.2M
9:57/mi
3:30:13
↑ 13↓ 160.2%
Finish· 26.22 mi
9:16/mi
3:39:40
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:20
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:55:20
Pace8:48 /mi
📊Positive Split: 10.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:4624:457:5824:45
7:58
-
10K
6.21 mi11:39:0749:067:5424:21
7:50
-0:08
15K
9.32 mi12:03:391:13:387:5424:32
7:54
+0:04
20K
12.43 mi12:28:551:38:547:5725:16
8:08
+0:14
Half
13.11 mi12:34:211:44:207:585:26
7:58
-0:10
25K
15.53 mi12:53:582:03:577:5919:37
8:05
+0:07
30K
18.64 mi13:20:482:30:478:0526:50
8:38
+0:33
20M
20.00 mi13:33:092:43:088:0912:21
9:06
+0:28
21M
21.00 mi13:42:152:52:148:129:06
9:06
0:00
35K
21.75 mi13:48:402:58:398:136:25
8:35
-0:31
23M
23.00 mi14:00:073:10:068:1611:27
9:09
+0:34
24M
24.00 mi14:09:003:18:598:178:53
8:53
-0:16
40K
24.85 mi14:16:483:26:478:197:48
9:07
+0:14
25.2M
25.20 mi14:20:143:30:138:213:26
9:57
+0:50
Finish
26.22 mi14:29:413:39:408:239:27
9:16
-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

7:50 /mi

Average Pace

8:23 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:57

56% of race

Time at Steady Pace

42:08

19% of race

Time at Slower Pace

53:35

24% of race

Average Pace: 8:23 /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 mi11:14:4624:457:5824:45
7:58
#13782
10K
6.21 mi11:39:0749:067:5424:21
7:50
#13621
15K
9.32 mi12:03:391:13:387:5424:32
7:54
#13578
20K
12.43 mi12:28:551:38:547:5725:16
8:08
#13768
Half
13.11 mi12:34:211:44:207:585:26
7:58
#13779
25K
15.53 mi12:53:582:03:577:5919:37
8:05
#13714
30K
18.64 mi13:20:482:30:478:0526:50
8:38
#14018
20M
20.00 mi13:33:092:43:088:0912:21
9:06
#14262
21M
21.00 mi13:42:152:52:148:129:06
9:06
#14229
35K
21.75 mi13:48:402:58:398:136:25
8:35
#14271
23M
23.00 mi14:00:073:10:068:1611:27
9:09
#14437
24M
24.00 mi14:09:003:18:598:178:53
8:53
#14518
40K
24.85 mi14:16:483:26:478:197:48
9:07
#14597
25.2M
25.20 mi14:20:143:30:138:213:26
9:57
#14636
Finish
26.22 mi14:29:413:39:408:239:27
9:16
#14855
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi137823894389413524(Top 51%)3797(Top 33%)3797(Top 466%)
10K6.21 mi3.10 mi13621+1613819+753819+7513470(Top 51%)3703(Top 32%)3703(Top 454%)
15K9.32 mi3.11 mi13578+433807+123807+1213524(Top 51%)3797(Top 33%)3797(Top 466%)
20K12.43 mi3.11 mi13768-1903947-1403947-14014473(Top 54%)4386(Top 38%)4386(Top 538%)
Half13.11 mi0.68 mi13779-113947394714160(Top 53%)4191(Top 37%)4191(Top 514%)
25K15.53 mi2.42 mi13714+653936+113936+1113472(Top 51%)3911(Top 34%)3911(Top 480%)
30K18.64 mi3.11 mi14018-3044160-2244160-22415152(Top 57%)5031(Top 44%)5031(Top 617%)
20M20.00 mi1.36 mi14262-2444335-1754335-17517027(Top 64%)6183(Top 54%)6183(Top 759%)
21M21.00 mi1.00 mi14229+334330+54330+513941(Top 52%)4467(Top 39%)4467(Top 548%)
35K21.75 mi0.75 mi14271-424373-434373-4315746(Top 59%)5541(Top 49%)5541(Top 680%)
23M23.00 mi1.25 mi14437-1664497-1244497-12416775(Top 63%)6167(Top 54%)6167(Top 757%)
24M24.00 mi1.00 mi14518-814564-674564-6716693(Top 63%)6187(Top 54%)6187(Top 759%)
40K24.85 mi0.85 mi14597-794641-774641-7716737(Top 63%)6249(Top 55%)6249(Top 767%)
25.2M25.20 mi0.35 mi14636-394676-354676-3517197(Top 65%)6523(Top 57%)6523(Top 800%)
Finish26.22 mi1.02 mi14855-2194824-1484824-14819258(Top 72%)7583(Top 66%)7583(Top 930%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

13524

Females

3797

F55-59

3797

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

13470

Females

3703

F55-59

3703

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

13524

Females

3797

F55-59

3797

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

14473

Females

4386

F55-59

4386

20K→Half

12.4 - 13.1 mi

Top 53%
×2story building
+19ft-37ft

Overall

14160

Females

4191

F55-59

4191

Half→25K

13.1 - 15.5 mi

Top 51%
×4story building
+66ft-88ft

Overall

13472

Females

3911

F55-59

3911

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

15152

Females

5031

F55-59

5031

30K→20M

18.6 - 20.0 mi

Top 64%
×5story building
+64ft-50ft

Overall

17027

Females

6183

F55-59

6183

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

13941

Females

4467

F55-59

4467

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

15746

Females

5541

F55-59

5541

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

16775

Females

6167

F55-59

6167

23M→24M

23.0 - 24.0 mi

Top 63%
×6story building
+12ft-82ft

Overall

16693

Females

6187

F55-59

6187

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

16737

Females

6249

F55-59

6249

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

17197

Females

6523

F55-59

6523

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

19258

Females

7583

F55-59

7583

Passing Analysis

Category:
Athletes Passed
1343
Passed By
2416
Net Change
-1073
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13782
5K → 10K392231+161#13782#13621
10K → 15K203160+43#13621#13578
15K → 20K123313-190#13578#13768
20K → Half2334-11#13768#13779
Half → 25K169104+65#13779#13714
25K → 30K108412-304#13714#14018
30K → 20M36280-244#14018#14262
20M → 21M9057+33#14262#14229
21M → 35K3981-42#14229#14271
35K → 23M39205-166#14271#14437
23M → 24M50131-81#14437#14518
24M → 40K40119-79#14518#14597
40K → 25.2M1756-39#14597#14636
25.2M → Finish14233-219#14636#14855
TOTALS13432416-1073
📊

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