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BOSTON MARATHON 2023

Qiang Li

Bib: 13465•M

NC

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
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
8:34/mi
26:37
↑ 97↓ 3451.5%
10K· 6.21 mi
8:16/mi
52:17
↑ 79↓ 1380.4%
15K· 9.32 mi
8:16/mi
1:17:59
↑ 67↓ 78
20K· 12.43 mi
8:16/mi
1:43:39
↑ 106↓ 860.1%
Half· 13.11 mi
8:12/mi
1:49:15
↑ 19↓ 370.5%
25K· 15.53 mi
8:31/mi
2:09:53
↑ 66↓ 880.2%
30K· 18.64 mi
8:33/mi
2:36:27
↑ 181↓ 1480.2%
20M
8:42/mi
2:48:16
↑ 64↓ 500.2%
21M
9:19/mi
2:57:35
↑ 106↓ 241.6%
35K· 21.75 mi
8:35/mi
3:04:00
↑ 17↓ 861.7%
23M
8:42/mi
3:14:53
↑ 23↓ 630.6%
24M
8:35/mi
3:23:28
↓ 821.3%
40K· 24.85 mi
8:42/mi
3:30:54
↓ 200.3%
25.2M
9:23/mi
3:34:08
↑ 13↓ 160.2%
Finish· 26.22 mi
8:20/mi
3:42:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:15
Pace8:20 /mi
2nd Half
Distance13.11 mi
Time1:53:23
Pace8:39 /mi
📊Positive Split: 3.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:2026:378:3426:37
8:34
-
10K
6.21 mi11:46:0052:178:2525:40
8:16
-0:18
15K
9.32 mi12:11:421:17:598:2225:42
8:16
0:00
20K
12.43 mi12:37:221:43:398:2025:40
8:16
0:00
Half
13.11 mi12:42:581:49:158:205:36
8:12
-0:04
25K
15.53 mi13:03:362:09:538:2220:38
8:31
+0:19
30K
18.64 mi13:30:102:36:278:2426:34
8:33
+0:02
20M
20.00 mi13:41:592:48:168:2511:49
8:42
+0:09
21M
21.00 mi13:51:182:57:358:279:19
9:19
+0:37
35K
21.75 mi13:57:433:04:008:286:25
8:35
-0:44
23M
23.00 mi14:08:363:14:538:2810:53
8:42
+0:07
24M
24.00 mi14:17:113:23:288:298:35
8:35
-0:07
40K
24.85 mi14:24:373:30:548:297:26
8:42
+0:07
25.2M
25.20 mi14:27:513:34:088:303:14
9:23
+0:41
Finish
26.22 mi14:36:213:42:388:308:30
8:20
-1:03

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

8:12 /mi

Average Pace

8:30 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:30:05

94% of race

Time at Steady Pace

12:33

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:29 /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 mi11:20:2026:378:3426:37
8:34
#18009
10K
6.21 mi11:46:0052:178:2525:40
8:16
#17303
15K
9.32 mi12:11:421:17:598:2225:42
8:16
#16956
20K
12.43 mi12:37:221:43:398:2025:40
8:16
#16546
Half
13.11 mi12:42:581:49:158:205:36
8:12
#16520
25K
15.53 mi13:03:362:09:538:2220:38
8:31
#16480
30K
18.64 mi13:30:102:36:278:2426:34
8:33
#16101
20M
20.00 mi13:41:592:48:168:2511:49
8:42
#15988
21M
21.00 mi13:51:182:57:358:279:19
9:19
#15914
35K
21.75 mi13:57:433:04:008:286:25
8:35
#15862
23M
23.00 mi14:08:363:14:538:2810:53
8:42
#15753
24M
24.00 mi14:17:113:23:288:298:35
8:35
#15725
40K
24.85 mi14:24:373:30:548:297:26
8:42
#15670
25.2M
25.20 mi14:27:513:34:088:303:14
9:23
#15659
Finish
26.22 mi14:36:213:42:388:308:30
8:20
#15602
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi18009114221142216349(Top 61%)10824(Top 71%)10824(Top 481%)
10K6.21 mi3.10 mi17303+70611167+25511167+25516645(Top 63%)10961(Top 72%)10961(Top 487%)
15K9.32 mi3.11 mi16956+34711055+11211055+11216349(Top 61%)10824(Top 71%)10824(Top 481%)
20K12.43 mi3.11 mi16546+41010883+17210883+17215349(Top 58%)10400(Top 69%)10400(Top 462%)
Half13.11 mi0.68 mi16520+2610873+1010873+1015815(Top 59%)10603(Top 70%)10603(Top 471%)
25K15.53 mi2.42 mi16480+4010832+4110832+4116247(Top 61%)10640(Top 70%)10640(Top 472%)
30K18.64 mi3.11 mi16101+37910646+18610646+18614604(Top 55%)9897(Top 65%)9897(Top 439%)
20M20.00 mi1.36 mi15988+11310583+6310583+6314819(Top 56%)9908(Top 65%)9908(Top 440%)
21M21.00 mi1.00 mi15914+7410532+5110532+5115054(Top 57%)9950(Top 66%)9950(Top 442%)
35K21.75 mi0.75 mi15862+5210492+4010492+4015697(Top 59%)10152(Top 67%)10152(Top 451%)
23M23.00 mi1.25 mi15753+10910417+7510417+7514320(Top 54%)9499(Top 63%)9499(Top 422%)
24M24.00 mi1.00 mi15725+2810389+2810389+2814951(Top 56%)9729(Top 64%)9729(Top 432%)
40K24.85 mi0.85 mi15670+5510363+2610363+2614449(Top 54%)9434(Top 62%)9434(Top 419%)
25.2M25.20 mi0.35 mi15659+1110359+410359+414525(Top 55%)9481(Top 62%)9481(Top 421%)
Finish26.22 mi1.02 mi15602+5710318+4110318+4114333(Top 54%)9405(Top 62%)9405(Top 418%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

16349

Males

10824

M45-49

10824

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

16645

Males

10961

M45-49

10961

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

16349

Males

10824

M45-49

10824

15K→20K

9.3 - 12.4 mi

Top 58%
×5story building
+106ft-86ft

Overall

15349

Males

10400

M45-49

10400

20K→Half

12.4 - 13.1 mi

Top 59%
×2story building
+19ft-37ft

Overall

15815

Males

10603

M45-49

10603

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

16247

Males

10640

M45-49

10640

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

14604

Males

9897

M45-49

9897

30K→20M

18.6 - 20.0 mi

Top 56%
×5story building
+64ft-50ft

Overall

14819

Males

9908

M45-49

9908

20M→21M

20.0 - 21.0 mi

Top 57%
×8story building
+106ft-24ft

Overall

15054

Males

9950

M45-49

9950

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

15697

Males

10152

M45-49

10152

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

14320

Males

9499

M45-49

9499

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

14951

Males

9729

M45-49

9729

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14449

Males

9434

M45-49

9434

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14525

Males

9481

M45-49

9481

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

14333

Males

9405

M45-49

9405

Passing Analysis

Category:
Athletes Passed
3048
Passed By
641
Net Change
+2407
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18009
5K → 10K821115+706#18009#17303
10K → 15K41669+347#17303#16956
15K → 20K43828+410#16956#16546
20K → Half4620+26#16546#16520
Half → 25K150110+40#16520#16480
25K → 30K41031+379#16480#16101
30K → 20M13522+113#16101#15988
20M → 21M12349+74#15988#15914
21M → 35K7725+52#15914#15862
35K → 23M13930+109#15862#15753
23M → 24M8456+28#15753#15725
24M → 40K9136+55#15725#15670
40K → 25.2M3120+11#15670#15659
25.2M → Finish8730+57#15659#15602
TOTALS3048641+2407
📊

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