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BOSTON MARATHON 2023

Liang Liang Li

Bib: 21243•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
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
8:53/mi
27:35
↑ 97↓ 3451.5%
10K· 6.21 mi
8:41/mi
54:34
↑ 79↓ 1380.4%
15K· 9.32 mi
8:41/mi
1:21:33
↑ 67↓ 78
20K· 12.43 mi
8:41/mi
1:48:32
↑ 106↓ 860.1%
Half· 13.11 mi
8:36/mi
1:54:24
↑ 19↓ 370.5%
25K· 15.53 mi
9:05/mi
2:16:26
↑ 66↓ 880.2%
30K· 18.64 mi
10:19/mi
2:48:28
↑ 181↓ 1480.2%
20M
9:37/mi
3:01:33
↑ 64↓ 500.2%
21M
9:37/mi
3:11:10
↑ 106↓ 241.6%
35K· 21.75 mi
8:48/mi
3:17:45
↑ 17↓ 861.7%
23M
9:21/mi
3:29:27
↑ 23↓ 630.6%
24M
8:51/mi
3:38:18
↓ 821.3%
40K· 24.85 mi
9:33/mi
3:46:28
↓ 200.3%
25.2M
10:32/mi
3:50:06
↑ 13↓ 160.2%
Finish· 26.22 mi
9:25/mi
3:59:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:24
Pace8:44 /mi
2nd Half
Distance13.11 mi
Time2:05:18
Pace9:33 /mi
📊Positive Split: 9.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:0027:358:5327:35
8:53
-
10K
6.21 mi11:46:5954:348:4726:59
8:41
-0:12
15K
9.32 mi12:13:581:21:338:4526:59
8:41
0:00
20K
12.43 mi12:40:571:48:328:4426:59
8:41
0:00
Half
13.11 mi12:46:491:54:248:445:52
8:36
-0:05
25K
15.53 mi13:08:512:16:268:4722:02
9:05
+0:29
30K
18.64 mi13:40:532:48:289:0232:02
10:19
+1:14
20M
20.00 mi13:53:583:01:339:0513:05
9:37
-0:42
21M
21.00 mi14:03:353:11:109:069:37
9:37
0:00
35K
21.75 mi14:10:103:17:459:066:35
8:48
-0:49
23M
23.00 mi14:21:523:29:279:0611:42
9:21
+0:33
24M
24.00 mi14:30:433:38:189:068:51
8:51
-0:30
40K
24.85 mi14:38:533:46:289:078:10
9:33
+0:42
25.2M
25.20 mi14:42:313:50:069:083:38
10:32
+0:59
Finish
26.22 mi14:52:073:59:429:099:36
9:25
-1:07

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

8:36 /mi

Average Pace

9:09 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:26:49

36% of race

Time at Steady Pace

1:16:45

32% of race

Time at Slower Pace

1:16:08

32% of race

Average Pace: 9:09 /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 mi11:20:0027:358:5327:35
8:53
#19894
10K
6.21 mi11:46:5954:348:4726:59
8:41
#19590
15K
9.32 mi12:13:581:21:338:4526:59
8:41
#19338
20K
12.43 mi12:40:571:48:328:4426:59
8:41
#18986
Half
13.11 mi12:46:491:54:248:445:52
8:36
#18953
25K
15.53 mi13:08:512:16:268:4722:02
9:05
#19003
30K
18.64 mi13:40:532:48:289:0232:02
10:19
#19770
20M
20.00 mi13:53:583:01:339:0513:05
9:37
#19713
21M
21.00 mi14:03:353:11:109:069:37
9:37
#19525
35K
21.75 mi14:10:103:17:459:066:35
8:48
#19432
23M
23.00 mi14:21:523:29:279:0611:42
9:21
#19332
24M
24.00 mi14:30:433:38:189:068:51
8:51
#19221
40K
24.85 mi14:38:533:46:289:078:10
9:33
#19197
25.2M
25.20 mi14:42:313:50:069:083:38
10:32
#19192
Finish
26.22 mi14:52:073:59:429:099:36
9:25
#19261
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi198947740774018909(Top 71%)7049(Top 62%)7049(Top 388%)
10K6.21 mi3.10 mi19590+3047525+2157525+21519347(Top 73%)7293(Top 64%)7293(Top 401%)
15K9.32 mi3.11 mi19338+2527343+1827343+18218909(Top 71%)7049(Top 62%)7049(Top 388%)
20K12.43 mi3.11 mi18986+3527114+2297114+22918040(Top 68%)6536(Top 57%)6536(Top 360%)
Half13.11 mi0.68 mi18953+337094+207094+2018384(Top 69%)6719(Top 59%)6719(Top 370%)
25K15.53 mi2.42 mi19003-507123-297123-2919372(Top 73%)7351(Top 64%)7351(Top 405%)
30K18.64 mi3.11 mi19770-7677598-4757598-47521802(Top 82%)8791(Top 77%)8791(Top 484%)
20M20.00 mi1.36 mi19713+577565+337565+3319304(Top 73%)7463(Top 65%)7463(Top 411%)
21M21.00 mi1.00 mi19525+1887474+917474+9116546(Top 62%)5949(Top 52%)5949(Top 327%)
35K21.75 mi0.75 mi19432+937422+527422+5216989(Top 64%)6283(Top 55%)6283(Top 346%)
23M23.00 mi1.25 mi19332+1007373+497373+4917730(Top 67%)6711(Top 59%)6711(Top 369%)
24M24.00 mi1.00 mi19221+1117317+567317+5616526(Top 62%)6102(Top 53%)6102(Top 336%)
40K24.85 mi0.85 mi19197+247312+57312+518533(Top 70%)7237(Top 63%)7237(Top 398%)
25.2M25.20 mi0.35 mi19192+57311+17311+119239(Top 72%)7634(Top 67%)7634(Top 420%)
Finish26.22 mi1.02 mi19261-697361-507361-5019853(Top 75%)7910(Top 69%)7910(Top 435%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

18909

Females

7049

F45-49

7049

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19347

Females

7293

F45-49

7293

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

18909

Females

7049

F45-49

7049

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

18040

Females

6536

F45-49

6536

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

18384

Females

6719

F45-49

6719

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

19372

Females

7351

F45-49

7351

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

21802

Females

8791

F45-49

8791

30K→20M

18.6 - 20.0 mi

Top 73%
×5story building
+64ft-50ft

Overall

19304

Females

7463

F45-49

7463

20M→21M

20.0 - 21.0 mi

Top 62%
×8story building
+106ft-24ft

Overall

16546

Females

5949

F45-49

5949

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

16989

Females

6283

F45-49

6283

35K→23M

21.8 - 23.0 mi

Top 67%
×5story building
+23ft-63ft

Overall

17730

Females

6711

F45-49

6711

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

16526

Females

6102

F45-49

6102

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

18533

Females

7237

F45-49

7237

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

19239

Females

7634

F45-49

7634

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

19853

Females

7910

F45-49

7910

Passing Analysis

Category:
Athletes Passed
2193
Passed By
1560
Net Change
+633
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19894
5K → 10K483179+304#19894#19590
10K → 15K34795+252#19590#19338
15K → 20K39139+352#19338#18986
20K → Half4916+33#18986#18953
Half → 25K112162-50#18953#19003
25K → 30K35802-767#19003#19770
30K → 20M10649+57#19770#19713
20M → 21M1968+188#19713#19525
21M → 35K1029+93#19525#19432
35K → 23M12828+100#19432#19332
23M → 24M12211+111#19332#19221
24M → 40K6541+24#19221#19197
40K → 25.2M2318+5#19197#19192
25.2M → Finish34103-69#19192#19261
TOTALS21931560+633
📊

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