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BOSTON MARATHON 2023

Bo Li

Bib: 21229•F

NJ

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
8:44/mi
27:08
↑ 97↓ 3451.5%
10K· 6.21 mi
8:52/mi
54:41
↑ 79↓ 1380.4%
15K· 9.32 mi
8:41/mi
1:21:39
↑ 67↓ 78
20K· 12.43 mi
9:00/mi
1:49:38
↑ 106↓ 860.1%
Half· 13.11 mi
8:36/mi
1:55:30
↑ 19↓ 370.5%
25K· 15.53 mi
9:00/mi
2:17:20
↑ 66↓ 880.2%
30K· 18.64 mi
9:45/mi
2:47:37
↑ 181↓ 1480.2%
20M
9:35/mi
3:00:39
↑ 64↓ 500.2%
21M
10:03/mi
3:10:42
↑ 106↓ 241.6%
35K· 21.75 mi
8:37/mi
3:17:09
↑ 17↓ 861.7%
23M
9:12/mi
3:28:40
↑ 23↓ 630.6%
24M
9:07/mi
3:37:47
↓ 821.3%
40K· 24.85 mi
9:21/mi
3:45:47
↓ 200.3%
25.2M
10:50/mi
3:49:31
↑ 13↓ 160.2%
Finish· 26.22 mi
9:25/mi
3:59:07
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:30
Pace8:49 /mi
2nd Half
Distance13.11 mi
Time2:03:37
Pace9:26 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:4727:088:4427:08
8:44
-
10K
6.21 mi11:48:2054:418:4827:33
8:52
+0:08
15K
9.32 mi12:15:181:21:398:4626:58
8:41
-0:11
20K
12.43 mi12:43:171:49:388:4927:59
9:00
+0:19
Half
13.11 mi12:49:091:55:308:495:52
8:36
-0:24
25K
15.53 mi13:10:592:17:208:5021:50
9:00
+0:24
30K
18.64 mi13:41:162:47:379:0030:17
9:45
+0:45
20M
20.00 mi13:54:183:00:399:0213:02
9:35
-0:10
21M
21.00 mi14:04:213:10:429:0510:03
10:03
+0:28
35K
21.75 mi14:10:483:17:099:046:27
8:37
-1:26
23M
23.00 mi14:22:193:28:409:0411:31
9:12
+0:35
24M
24.00 mi14:31:263:37:479:049:07
9:07
-0:05
40K
24.85 mi14:39:263:45:479:058:00
9:21
+0:14
25.2M
25.20 mi14:43:103:49:319:063:44
10:50
+1:29
Finish
26.22 mi14:52:463:59:079:089:36
9:25
-1:25

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

9:08 /mi

Slowest Pace

10:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:06:25

28% of race

Time at Steady Pace

1:46:00

44% of race

Time at Slower Pace

1:06:42

28% of race

Average Pace: 9:07 /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 mi11:20:4727:088:4427:08
8:44
#19102
10K
6.21 mi11:48:2054:418:4827:33
8:52
#19684
15K
9.32 mi12:15:181:21:398:4626:58
8:41
#19399
20K
12.43 mi12:43:171:49:388:4927:59
9:00
#19436
Half
13.11 mi12:49:091:55:308:495:52
8:36
#19379
25K
15.53 mi13:10:592:17:208:5021:50
9:00
#19311
30K
18.64 mi13:41:162:47:379:0030:17
9:45
#19558
20M
20.00 mi13:54:183:00:399:0213:02
9:35
#19516
21M
21.00 mi14:04:213:10:429:0510:03
10:03
#19422
35K
21.75 mi14:10:483:17:099:046:27
8:37
#19318
23M
23.00 mi14:22:193:28:409:0411:31
9:12
#19183
24M
24.00 mi14:31:263:37:479:049:07
9:07
#19106
40K
24.85 mi14:39:263:45:479:058:00
9:21
#19058
25.2M
25.20 mi14:43:103:49:319:063:44
10:50
#19097
Finish
26.22 mi14:52:463:59:079:089:36
9:25
#19162
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi191027263726318888(Top 71%)7037(Top 62%)7037(Top 583%)
10K6.21 mi3.10 mi19684-5827577-3147577-31420269(Top 76%)7850(Top 69%)7850(Top 650%)
15K9.32 mi3.11 mi19399+2857390+1877390+18718888(Top 71%)7037(Top 62%)7037(Top 583%)
20K12.43 mi3.11 mi19436-377390739019738(Top 74%)7517(Top 66%)7517(Top 623%)
Half13.11 mi0.68 mi19379+577356+347356+3418381(Top 69%)6716(Top 59%)6716(Top 556%)
25K15.53 mi2.42 mi19311+687313+437313+4318992(Top 71%)7128(Top 62%)7128(Top 591%)
30K18.64 mi3.11 mi19558-2477463-1507463-15020284(Top 76%)7927(Top 69%)7927(Top 657%)
20M20.00 mi1.36 mi19516+427464-17464-119201(Top 72%)7398(Top 65%)7398(Top 613%)
21M21.00 mi1.00 mi19422+947414+507414+5018222(Top 68%)6887(Top 60%)6887(Top 571%)
35K21.75 mi0.75 mi19318+1047359+557359+5516039(Top 60%)5729(Top 50%)5729(Top 475%)
23M23.00 mi1.25 mi19183+1357286+737286+7317076(Top 64%)6338(Top 55%)6338(Top 525%)
24M24.00 mi1.00 mi19106+777256+307256+3017761(Top 67%)6786(Top 59%)6786(Top 562%)
40K24.85 mi0.85 mi19058+487233+237233+2317804(Top 67%)6845(Top 60%)6845(Top 567%)
25.2M25.20 mi0.35 mi19097-397258-257258-2520054(Top 75%)8085(Top 71%)8085(Top 670%)
Finish26.22 mi1.02 mi19162-657300-427300-4219852(Top 75%)7909(Top 69%)7909(Top 655%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

18888

Females

7037

F50-54

7037

5K→10K

3.1 - 6.2 mi

Top 76%
×5story building
+79ft-138ft

Overall

20269

Females

7850

F50-54

7850

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

18888

Females

7037

F50-54

7037

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

19738

Females

7517

F50-54

7517

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

18381

Females

6716

F50-54

6716

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

18992

Females

7128

F50-54

7128

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

20284

Females

7927

F50-54

7927

30K→20M

18.6 - 20.0 mi

Top 72%
×5story building
+64ft-50ft

Overall

19201

Females

7398

F50-54

7398

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

18222

Females

6887

F50-54

6887

21M→35K

21.0 - 21.8 mi

Top 60%
×7story building
+17ft-86ft

Overall

16039

Females

5729

F50-54

5729

35K→23M

21.8 - 23.0 mi

Top 64%
×5story building
+23ft-63ft

Overall

17076

Females

6338

F50-54

6338

23M→24M

23.0 - 24.0 mi

Top 67%
×6story building
+12ft-82ft

Overall

17761

Females

6786

F50-54

6786

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

17804

Females

6845

F50-54

6845

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

20054

Females

8085

F50-54

8085

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

19852

Females

7909

F50-54

7909

Passing Analysis

Category:
Athletes Passed
1637
Passed By
1697
Net Change
-60
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19102
5K → 10K130712-582#19102#19684
10K → 15K36277+285#19684#19399
15K → 20K146183-37#19399#19436
20K → Half658+57#19436#19379
Half → 25K15688+68#19379#19311
25K → 30K89336-247#19311#19558
30K → 20M10361+42#19558#19516
20M → 21M12733+94#19516#19422
21M → 35K1073+104#19422#19318
35K → 23M14914+135#19318#19183
23M → 24M9417+77#19183#19106
24M → 40K7224+48#19106#19058
40K → 25.2M1150-39#19058#19097
25.2M → Finish2691-65#19097#19162
TOTALS16371697-60
📊

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