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BOSTON MARATHON 2023

Liewei Bao

Bib: 27506•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
8:05/mi
25:08
↑ 97↓ 3451.5%
10K· 6.21 mi
7:56/mi
49:46
↑ 79↓ 1380.4%
15K· 9.32 mi
7:59/mi
1:14:34
↑ 67↓ 78
20K· 12.43 mi
8:04/mi
1:39:38
↑ 106↓ 860.1%
Half· 13.11 mi
7:46/mi
1:44:56
↑ 19↓ 370.5%
25K· 15.53 mi
8:39/mi
2:05:54
↑ 66↓ 880.2%
30K· 18.64 mi
8:35/mi
2:32:33
↑ 181↓ 1480.2%
20M
8:56/mi
2:44:42
↑ 64↓ 500.2%
21M
9:10/mi
2:53:52
↑ 106↓ 241.6%
35K· 21.75 mi
7:55/mi
2:59:47
↑ 17↓ 861.7%
23M
8:11/mi
3:10:02
↑ 23↓ 630.6%
24M
7:57/mi
3:17:59
↓ 821.3%
40K· 24.85 mi
8:07/mi
3:24:55
↓ 200.3%
25.2M
8:45/mi
3:27:56
↑ 13↓ 160.2%
Finish· 26.22 mi
7:44/mi
3:35:49
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:56
Pace8:00 /mi
2nd Half
Distance13.11 mi
Time1:50:53
Pace8:28 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:41:5325:088:0525:08
8:05
-
10K
6.21 mi12:06:3149:468:0124:38
7:56
-0:09
15K
9.32 mi12:31:191:14:348:0024:48
7:59
+0:03
20K
12.43 mi12:56:231:39:388:0125:04
8:04
+0:05
Half
13.11 mi13:01:411:44:568:005:18
7:46
-0:18
25K
15.53 mi13:22:392:05:548:0620:58
8:39
+0:53
30K
18.64 mi13:49:182:32:338:1126:39
8:35
-0:04
20M
20.00 mi14:01:272:44:428:1412:09
8:56
+0:21
21M
21.00 mi14:10:372:53:528:179:10
9:10
+0:14
35K
21.75 mi14:16:322:59:478:165:55
7:55
-1:15
23M
23.00 mi14:26:473:10:028:1610:15
8:11
+0:16
24M
24.00 mi14:34:443:17:598:157:57
7:57
-0:14
40K
24.85 mi14:41:403:24:558:156:56
8:07
+0:10
25.2M
25.20 mi14:44:413:27:568:153:01
8:45
+0:38
Finish
26.22 mi14:52:343:35:498:147:53
7:44
-1:01

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

7:44 /mi

Average Pace

8:14 /mi

Slowest Pace

9:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:23:52

67% of race

Time at Steady Pace

1:02:47

29% of race

Time at Slower Pace

9:10

4% of race

Average Pace: 8:14 /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 mi11:41:5325:088:0525:08
8:05
#14621
10K
6.21 mi12:06:3149:468:0124:38
7:56
#14446
15K
9.32 mi12:31:191:14:348:0024:48
7:59
#14352
20K
12.43 mi12:56:231:39:388:0125:04
8:04
#14227
Half
13.11 mi13:01:411:44:568:005:18
7:46
#14146
25K
15.53 mi13:22:392:05:548:0620:58
8:39
#14679
30K
18.64 mi13:49:182:32:338:1126:39
8:35
#14678
20M
20.00 mi14:01:272:44:428:1412:09
8:56
#14811
21M
21.00 mi14:10:372:53:528:179:10
9:10
#14760
35K
21.75 mi14:16:322:59:478:165:55
7:55
#14617
23M
23.00 mi14:26:473:10:028:1610:15
8:11
#14418
24M
24.00 mi14:34:443:17:598:157:57
7:57
#14235
40K
24.85 mi14:41:403:24:558:156:56
8:07
#14090
25.2M
25.20 mi14:44:413:27:568:153:01
8:45
#14026
Finish
26.22 mi14:52:343:35:498:147:53
7:44
#13856
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi14621101991019914221(Top 53%)9993(Top 66%)9993(Top 487%)
10K6.21 mi3.10 mi14446+17510120+7910120+7914222(Top 53%)10012(Top 66%)10012(Top 488%)
15K9.32 mi3.11 mi14352+9410069+5110069+5114221(Top 53%)9993(Top 66%)9993(Top 487%)
20K12.43 mi3.11 mi14227+1259991+789991+7813975(Top 52%)9863(Top 65%)9863(Top 481%)
Half13.11 mi0.68 mi14146+819960+319960+3112418(Top 47%)9254(Top 61%)9254(Top 451%)
25K15.53 mi2.42 mi14679-53310147-18710147-18717067(Top 64%)10998(Top 72%)10998(Top 536%)
30K18.64 mi3.11 mi14678+110119+2810119+2814771(Top 55%)9956(Top 66%)9956(Top 485%)
20M20.00 mi1.36 mi14811-13310148-2910148-2916204(Top 61%)10488(Top 69%)10488(Top 511%)
21M21.00 mi1.00 mi14760+5110098+5010098+5014284(Top 54%)9617(Top 63%)9617(Top 469%)
35K21.75 mi0.75 mi14617+14310024+7410024+7411447(Top 43%)8337(Top 55%)8337(Top 406%)
23M23.00 mi1.25 mi14418+1999917+1079917+10711100(Top 42%)8031(Top 53%)8031(Top 391%)
24M24.00 mi1.00 mi14235+1839828+899828+8910876(Top 41%)7849(Top 52%)7849(Top 383%)
40K24.85 mi0.85 mi14090+1459745+839745+8310758(Top 40%)7734(Top 51%)7734(Top 377%)
25.2M25.20 mi0.35 mi14026+649713+329713+3210990(Top 41%)7801(Top 51%)7801(Top 380%)
Finish26.22 mi1.02 mi13856+1709634+799634+7910206(Top 38%)7406(Top 49%)7406(Top 361%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

14221

Males

9993

M50-54

9993

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14222

Males

10012

M50-54

10012

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

14221

Males

9993

M50-54

9993

15K→20K

9.3 - 12.4 mi

Top 52%
×5story building
+106ft-86ft

Overall

13975

Males

9863

M50-54

9863

20K→Half

12.4 - 13.1 mi

Top 47%
×2story building
+19ft-37ft

Overall

12418

Males

9254

M50-54

9254

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

17067

Males

10998

M50-54

10998

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

14771

Males

9956

M50-54

9956

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

16204

Males

10488

M50-54

10488

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

14284

Males

9617

M50-54

9617

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

11447

Males

8337

M50-54

8337

35K→23M

21.8 - 23.0 mi

Top 42%
×5story building
+23ft-63ft

Overall

11100

Males

8031

M50-54

8031

23M→24M

23.0 - 24.0 mi

Top 41%
×6story building
+12ft-82ft

Overall

10876

Males

7849

M50-54

7849

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

10758

Males

7734

M50-54

7734

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

10990

Males

7801

M50-54

7801

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2story building
+22ft-21ft

Overall

10206

Males

7406

M50-54

7406

Passing Analysis

Category:
Athletes Passed
2257
Passed By
1492
Net Change
+765
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14621
5K → 10K389214+175#14621#14446
10K → 15K235141+94#14446#14352
15K → 20K232107+125#14352#14227
20K → Half876+81#14227#14146
Half → 25K40573-533#14146#14679
25K → 30K169168+1#14679#14678
30K → 20M45178-133#14678#14811
20M → 21M11059+51#14811#14760
21M → 35K1441+143#14760#14617
35K → 23M2078+199#14617#14418
23M → 24M19411+183#14418#14235
24M → 40K15611+145#14235#14090
40K → 25.2M673+64#14090#14026
25.2M → Finish18212+170#14026#13856
TOTALS22571492+765
📊

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