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BOSTON MARATHON 2023

Liyi Guo

Bib: 18386•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
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
8:36/mi
26:42
↑ 97↓ 3451.5%
10K· 6.21 mi
8:08/mi
51:57
↑ 79↓ 1380.4%
15K· 9.32 mi
8:02/mi
1:16:54
↑ 67↓ 78
20K· 12.43 mi
8:06/mi
1:42:03
↑ 106↓ 860.1%
Half· 13.11 mi
8:01/mi
1:47:31
↑ 19↓ 370.5%
25K· 15.53 mi
8:26/mi
2:07:59
↑ 66↓ 880.2%
30K· 18.64 mi
9:06/mi
2:36:15
↑ 181↓ 1480.2%
20M
8:37/mi
2:47:58
↑ 64↓ 500.2%
21M
8:59/mi
2:56:57
↑ 106↓ 241.6%
35K· 21.75 mi
8:20/mi
3:03:11
↑ 17↓ 861.7%
23M
8:42/mi
3:14:04
↑ 23↓ 630.6%
24M
8:24/mi
3:22:28
↓ 821.3%
40K· 24.85 mi
8:25/mi
3:29:40
↓ 200.3%
25.2M
9:25/mi
3:32:55
↑ 13↓ 160.2%
Finish· 26.22 mi
8:08/mi
3:41:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:31
Pace8:12 /mi
2nd Half
Distance13.11 mi
Time1:53:41
Pace8:40 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:2626:428:3626:42
8:36
-
10K
6.21 mi11:47:4151:578:2225:15
8:08
-0:28
15K
9.32 mi12:12:381:16:548:1524:57
8:02
-0:06
20K
12.43 mi12:37:471:42:038:1325:09
8:06
+0:04
Half
13.11 mi12:43:151:47:318:125:28
8:01
-0:05
25K
15.53 mi13:03:432:07:598:1420:28
8:26
+0:25
30K
18.64 mi13:31:592:36:158:2328:16
9:06
+0:40
20M
20.00 mi13:43:422:47:588:2411:43
8:37
-0:29
21M
21.00 mi13:52:412:56:578:268:59
8:59
+0:22
35K
21.75 mi13:58:553:03:118:256:14
8:20
-0:39
23M
23.00 mi14:09:483:14:048:2610:53
8:42
+0:22
24M
24.00 mi14:18:123:22:288:268:24
8:24
-0:18
40K
24.85 mi14:25:243:29:408:267:12
8:25
+0:01
25.2M
25.20 mi14:28:393:32:558:273:15
9:25
+1:00
Finish
26.22 mi14:36:563:41:128:278:17
8:08
-1:17

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

8:01 /mi

Average Pace

8:27 /mi

Slowest Pace

9:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:00:42

82% of race

Time at Steady Pace

40:30

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:26 /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 mi11:22:2626:428:3626:42
8:36
#18175
10K
6.21 mi11:47:4151:578:2225:15
8:08
#16918
15K
9.32 mi12:12:381:16:548:1524:57
8:02
#16183
20K
12.43 mi12:37:471:42:038:1325:09
8:06
#15651
Half
13.11 mi12:43:151:47:318:125:28
8:01
#15595
25K
15.53 mi13:03:432:07:598:1420:28
8:26
#15610
30K
18.64 mi13:31:592:36:158:2328:16
9:06
#16032
20M
20.00 mi13:43:422:47:588:2411:43
8:37
#15894
21M
21.00 mi13:52:412:56:578:268:59
8:59
#15702
35K
21.75 mi13:58:553:03:118:256:14
8:20
#15636
23M
23.00 mi14:09:483:14:048:2610:53
8:42
#15546
24M
24.00 mi14:18:123:22:288:268:24
8:24
#15462
40K
24.85 mi14:25:243:29:408:267:12
8:25
#15364
25.2M
25.20 mi14:28:393:32:558:273:15
9:25
#15334
Finish
26.22 mi14:36:563:41:128:278:17
8:08
#15234
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi18175114851148514631(Top 55%)10150(Top 67%)10150(Top 714%)
10K6.21 mi3.10 mi16918+125711039+44611039+44615705(Top 59%)10601(Top 70%)10601(Top 745%)
15K9.32 mi3.11 mi16183+73510763+27610763+27614631(Top 55%)10150(Top 67%)10150(Top 714%)
20K12.43 mi3.11 mi15651+53210545+21810545+21814188(Top 53%)9958(Top 66%)9958(Top 700%)
Half13.11 mi0.68 mi15595+5610518+2710518+2714446(Top 54%)10085(Top 66%)10085(Top 709%)
25K15.53 mi2.42 mi15610-1510494+2410494+2415832(Top 59%)10473(Top 69%)10473(Top 736%)
30K18.64 mi3.11 mi16032-42210616-12210616-12217666(Top 66%)11195(Top 74%)11195(Top 787%)
20M20.00 mi1.36 mi15894+13810533+8310533+8314387(Top 54%)9733(Top 64%)9733(Top 684%)
21M21.00 mi1.00 mi15702+19210435+9810435+9813303(Top 50%)9184(Top 61%)9184(Top 646%)
35K21.75 mi0.75 mi15636+6610399+3610399+3614267(Top 54%)9545(Top 63%)9545(Top 671%)
23M23.00 mi1.25 mi15546+9010331+6810331+6814318(Top 54%)9497(Top 63%)9497(Top 668%)
24M24.00 mi1.00 mi15462+8410289+4210289+4213856(Top 52%)9253(Top 61%)9253(Top 651%)
40K24.85 mi0.85 mi15364+9810243+4610243+4612829(Top 48%)8704(Top 57%)8704(Top 612%)
25.2M25.20 mi0.35 mi15334+3010221+2210221+2214769(Top 55%)9573(Top 63%)9573(Top 673%)
Finish26.22 mi1.02 mi15234+10010171+5010171+5012954(Top 49%)8751(Top 58%)8751(Top 615%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

14631

Males

10150

M55-59

10150

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15705

Males

10601

M55-59

10601

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

14631

Males

10150

M55-59

10150

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

14188

Males

9958

M55-59

9958

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

14446

Males

10085

M55-59

10085

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

15832

Males

10473

M55-59

10473

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

17666

Males

11195

M55-59

11195

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

14387

Males

9733

M55-59

9733

20M→21M

20.0 - 21.0 mi

Top 50%
×8story building
+106ft-24ft

Overall

13303

Males

9184

M55-59

9184

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

14267

Males

9545

M55-59

9545

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

14318

Males

9497

M55-59

9497

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

13856

Males

9253

M55-59

9253

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

12829

Males

8704

M55-59

8704

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14769

Males

9573

M55-59

9573

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2story building
+22ft-21ft

Overall

12954

Males

8751

M55-59

8751

Passing Analysis

Category:
Athletes Passed
3859
Passed By
918
Net Change
+2941
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18175
5K → 10K131457+1257#18175#16918
10K → 15K76328+735#16918#16183
15K → 20K54715+532#16183#15651
20K → Half659+56#15651#15595
Half → 25K139154-15#15595#15610
25K → 30K72494-422#15610#16032
30K → 20M16022+138#16032#15894
20M → 21M20412+192#15894#15702
21M → 35K7913+66#15702#15636
35K → 23M13040+90#15636#15546
23M → 24M10319+84#15546#15462
24M → 40K11719+98#15462#15364
40K → 25.2M4313+30#15364#15334
25.2M → Finish12323+100#15334#15234
TOTALS3859918+2941
📊

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