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BOSTON MARATHON 2023

Amy Li

Bib: 23011•F

AB

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
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
8:54/mi
27:38
↑ 97↓ 3451.5%
10K· 6.21 mi
8:50/mi
55:04
↑ 79↓ 1380.4%
15K· 9.32 mi
8:52/mi
1:22:37
↑ 67↓ 78
20K· 12.43 mi
9:06/mi
1:50:52
↑ 106↓ 860.1%
Half· 13.11 mi
8:46/mi
1:56:51
↑ 19↓ 370.5%
25K· 15.53 mi
9:12/mi
2:19:09
↑ 66↓ 880.2%
30K· 18.64 mi
9:27/mi
2:48:31
↑ 181↓ 1480.2%
20M
9:23/mi
3:01:16
↑ 64↓ 500.2%
21M
9:59/mi
3:11:15
↑ 106↓ 241.6%
35K· 21.75 mi
8:56/mi
3:17:56
↑ 17↓ 861.7%
23M
9:02/mi
3:29:15
↑ 23↓ 630.6%
24M
8:32/mi
3:37:47
↓ 821.3%
40K· 24.85 mi
8:30/mi
3:45:03
↓ 200.3%
25.2M
8:59/mi
3:48:09
↑ 13↓ 160.2%
Finish· 26.22 mi
8:11/mi
3:56:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:51
Pace8:55 /mi
2nd Half
Distance13.11 mi
Time1:59:38
Pace9:08 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:5827:388:5427:38
8:54
-
10K
6.21 mi11:52:2455:048:5227:26
8:50
-0:04
15K
9.32 mi12:19:571:22:378:5227:33
8:52
+0:02
20K
12.43 mi12:48:121:50:528:5528:15
9:06
+0:14
Half
13.11 mi12:54:111:56:518:555:59
8:46
-0:20
25K
15.53 mi13:16:292:19:098:5722:18
9:12
+0:26
30K
18.64 mi13:45:512:48:319:0229:22
9:27
+0:15
20M
20.00 mi13:58:363:01:169:0412:45
9:23
-0:04
21M
21.00 mi14:08:353:11:159:069:59
9:59
+0:36
35K
21.75 mi14:15:163:17:569:066:41
8:56
-1:03
23M
23.00 mi14:26:353:29:159:0611:19
9:02
+0:06
24M
24.00 mi14:35:073:37:479:048:32
8:32
-0:30
40K
24.85 mi14:42:233:45:039:037:16
8:30
-0:02
25.2M
25.20 mi14:45:293:48:099:033:06
8:59
+0:29
Finish
26.22 mi14:53:493:56:299:028:20
8:11
-0:48

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

8:11 /mi

Average Pace

9:02 /mi

Slowest Pace

9:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

24:08

10% of race

Time at Steady Pace

2:17:57

58% of race

Time at Slower Pace

1:14:24

31% of race

Average Pace: 9:01 /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 mi11:24:5827:388:5427:38
8:54
#19975
10K
6.21 mi11:52:2455:048:5227:26
8:50
#20003
15K
9.32 mi12:19:571:22:378:5227:33
8:52
#19943
20K
12.43 mi12:48:121:50:528:5528:15
9:06
#19971
Half
13.11 mi12:54:111:56:518:555:59
8:46
#19919
25K
15.53 mi13:16:292:19:098:5722:18
9:12
#19922
30K
18.64 mi13:45:512:48:319:0229:22
9:27
#19777
20M
20.00 mi13:58:363:01:169:0412:45
9:23
#19665
21M
21.00 mi14:08:353:11:159:069:59
9:59
#19538
35K
21.75 mi14:15:163:17:569:066:41
8:56
#19471
23M
23.00 mi14:26:353:29:159:0611:19
9:02
#19285
24M
24.00 mi14:35:073:37:479:048:32
8:32
#19107
40K
24.85 mi14:42:233:45:039:037:16
8:30
#18935
25.2M
25.20 mi14:45:293:48:099:033:06
8:59
#18829
Finish
26.22 mi14:53:493:56:299:028:20
8:11
#18658
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi199757805780519901(Top 75%)7636(Top 67%)7636(Top 633%)
10K6.21 mi3.10 mi20003-287770+357770+3520097(Top 75%)7754(Top 68%)7754(Top 642%)
15K9.32 mi3.11 mi19943+607703+677703+6719901(Top 75%)7636(Top 67%)7636(Top 633%)
20K12.43 mi3.11 mi19971-287712-97712-920122(Top 76%)7742(Top 68%)7742(Top 641%)
Half13.11 mi0.68 mi19919+527679+337679+3319404(Top 73%)7337(Top 64%)7337(Top 608%)
25K15.53 mi2.42 mi19922-37669+107669+1019848(Top 75%)7616(Top 67%)7616(Top 631%)
30K18.64 mi3.11 mi19777+1457602+677602+6719266(Top 72%)7340(Top 64%)7340(Top 608%)
20M20.00 mi1.36 mi19665+1127536+667536+6618418(Top 69%)6986(Top 61%)6986(Top 579%)
21M21.00 mi1.00 mi19538+1277485+517485+5118007(Top 68%)6772(Top 59%)6772(Top 561%)
35K21.75 mi0.75 mi19471+677447+387447+3817685(Top 66%)6670(Top 58%)6670(Top 553%)
23M23.00 mi1.25 mi19285+1867341+1067341+10616285(Top 61%)5911(Top 52%)5911(Top 490%)
24M24.00 mi1.00 mi19107+1787257+847257+8414723(Top 55%)5090(Top 45%)5090(Top 422%)
40K24.85 mi0.85 mi18935+1727163+947163+9413412(Top 50%)4445(Top 39%)4445(Top 368%)
25.2M25.20 mi0.35 mi18829+1067119+447119+4412616(Top 47%)4070(Top 36%)4070(Top 337%)
Finish26.22 mi1.02 mi18658+1717025+947025+9413344(Top 50%)4398(Top 39%)4398(Top 364%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21story building
+97ft-345ft

Overall

19901

Females

7636

F50-54

7636

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

20097

Females

7754

F50-54

7754

10K→15K

6.2 - 9.3 mi

Top 75%
×3story building
+67ft-78ft

Overall

19901

Females

7636

F50-54

7636

15K→20K

9.3 - 12.4 mi

Top 76%
×5story building
+106ft-86ft

Overall

20122

Females

7742

F50-54

7742

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

19404

Females

7337

F50-54

7337

Half→25K

13.1 - 15.5 mi

Top 75%
×4story building
+66ft-88ft

Overall

19848

Females

7616

F50-54

7616

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

19266

Females

7340

F50-54

7340

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

18418

Females

6986

F50-54

6986

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

18007

Females

6772

F50-54

6772

21M→35K

21.0 - 21.8 mi

Top 66%
×7story building
+17ft-86ft

Overall

17685

Females

6670

F50-54

6670

35K→23M

21.8 - 23.0 mi

Top 61%
×5story building
+23ft-63ft

Overall

16285

Females

5911

F50-54

5911

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

14723

Females

5090

F50-54

5090

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

13412

Females

4445

F50-54

4445

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

12616

Females

4070

F50-54

4070

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

13344

Females

4398

F50-54

4398

Passing Analysis

Category:
Athletes Passed
2300
Passed By
983
Net Change
+1317
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19975
5K → 10K287315-28#19975#20003
10K → 15K220160+60#20003#19943
15K → 20K167195-28#19943#19971
20K → Half6311+52#19971#19919
Half → 25K126129-3#19919#19922
25K → 30K24095+145#19922#19777
30K → 20M13927+112#19777#19665
20M → 21M14518+127#19665#19538
21M → 35K8215+67#19538#19471
35K → 23M1937+186#19471#19285
23M → 24M1802+178#19285#19107
24M → 40K1742+172#19107#18935
40K → 25.2M1060+106#18935#18829
25.2M → Finish1787+171#18829#18658
TOTALS2300983+1317
📊

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