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BOSTON MARATHON 2023

Jianyu Liu

Bib: 10913•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 22%
Gender (Male)
#0 / 15176
Top 35%
Masters (Masters Men)
#0 / 9891
Top 21%
Division (M45-49)
#0 / 2252
Top 27%
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
7:11/mi
22:19
↑ 97↓ 3451.5%
10K· 6.21 mi
6:53/mi
43:43
↑ 79↓ 1380.4%
15K· 9.32 mi
6:50/mi
1:04:58
↑ 67↓ 78
20K· 12.43 mi
6:59/mi
1:26:41
↑ 106↓ 860.1%
Half· 13.11 mi
6:56/mi
1:31:25
↑ 19↓ 370.5%
25K· 15.53 mi
7:05/mi
1:48:36
↑ 66↓ 880.2%
30K· 18.64 mi
7:22/mi
2:11:30
↑ 181↓ 1480.2%
20M
7:17/mi
2:21:24
↑ 64↓ 500.2%
21M
7:48/mi
2:29:12
↑ 106↓ 241.6%
35K· 21.75 mi
7:18/mi
2:34:40
↑ 17↓ 861.7%
23M
7:29/mi
2:44:02
↑ 23↓ 630.6%
24M
7:23/mi
2:51:25
↓ 821.3%
40K· 24.85 mi
7:26/mi
2:57:46
↓ 200.3%
25.2M
8:01/mi
3:00:32
↑ 13↓ 160.2%
Finish· 26.22 mi
7:30/mi
3:08:11
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:31:25
Pace6:58 /mi
2nd Half
Distance13.11 mi
Time1:36:46
Pace7:23 /mi
📊Positive Split: 5.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:2922:197:1122:19
7:11
-
10K
6.21 mi11:09:5343:437:0221:24
6:53
-0:18
15K
9.32 mi11:31:081:04:586:5821:15
6:50
-0:03
20K
12.43 mi11:52:511:26:416:5921:43
6:59
+0:09
Half
13.11 mi11:57:351:31:256:584:44
6:56
-0:03
25K
15.53 mi12:14:461:48:366:5917:11
7:05
+0:09
30K
18.64 mi12:37:402:11:307:0322:54
7:22
+0:17
20M
20.00 mi12:47:342:21:247:049:54
7:17
-0:05
21M
21.00 mi12:55:222:29:127:067:48
7:48
+0:31
35K
21.75 mi13:00:502:34:407:075:28
7:18
-0:30
23M
23.00 mi13:10:122:44:027:089:22
7:29
+0:11
24M
24.00 mi13:17:352:51:257:097:23
7:23
-0:06
40K
24.85 mi13:23:562:57:467:096:21
7:26
+0:03
25.2M
25.20 mi13:26:423:00:327:102:46
8:01
+0:35
Finish
26.22 mi13:34:213:08:117:117:39
7:30
-0:31

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

6:50 /mi

Average Pace

7:11 /mi

Slowest Pace

8:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:57:37

94% of race

Time at Steady Pace

10:34

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:11 /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 mi10:48:2922:197:1122:19
7:11
#7385
10K
6.21 mi11:09:5343:437:0221:24
6:53
#6707
15K
9.32 mi11:31:081:04:586:5821:15
6:50
#6315
20K
12.43 mi11:52:511:26:416:5921:43
6:59
#6194
Half
13.11 mi11:57:351:31:256:584:44
6:56
#6197
25K
15.53 mi12:14:461:48:366:5917:11
7:05
#6165
30K
18.64 mi12:37:402:11:307:0322:54
7:22
#6159
20M
20.00 mi12:47:342:21:247:049:54
7:17
#6062
21M
21.00 mi12:55:222:29:127:067:48
7:48
#6029
35K
21.75 mi13:00:502:34:407:075:28
7:18
#6029
23M
23.00 mi13:10:122:44:027:089:22
7:29
#5990
24M
24.00 mi13:17:352:51:257:097:23
7:23
#5984
40K
24.85 mi13:23:562:57:467:096:21
7:26
#5946
25.2M
25.20 mi13:26:423:00:327:102:46
8:01
#5940
Finish
26.22 mi13:34:213:08:117:117:39
7:30
#5985
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi7385656365635481(Top 21%)5050(Top 33%)5050(Top 224%)
10K6.21 mi3.10 mi6707+6786041+5226041+5226033(Top 23%)5488(Top 36%)5488(Top 244%)
15K9.32 mi3.11 mi6315+3925719+3225719+3225481(Top 21%)5050(Top 33%)5050(Top 224%)
20K12.43 mi3.11 mi6194+1215624+955624+955919(Top 22%)5410(Top 36%)5410(Top 240%)
Half13.11 mi0.68 mi6197-35634-105634-106188(Top 23%)5631(Top 37%)5631(Top 250%)
25K15.53 mi2.42 mi6165+325605+295605+296041(Top 23%)5477(Top 36%)5477(Top 243%)
30K18.64 mi3.11 mi6159+65584+215584+216418(Top 24%)5671(Top 37%)5671(Top 252%)
20M20.00 mi1.36 mi6062+975500+845500+845557(Top 21%)4969(Top 33%)4969(Top 221%)
21M21.00 mi1.00 mi6029+335462+385462+386159(Top 23%)5307(Top 35%)5307(Top 236%)
35K21.75 mi0.75 mi60295453+95453+97127(Top 27%)5967(Top 39%)5967(Top 265%)
23M23.00 mi1.25 mi5990+395411+425411+426296(Top 24%)5368(Top 35%)5368(Top 238%)
24M24.00 mi1.00 mi5984+65396+155396+156903(Top 26%)5656(Top 37%)5656(Top 251%)
40K24.85 mi0.85 mi5946+385354+425354+426222(Top 23%)5157(Top 34%)5157(Top 229%)
25.2M25.20 mi0.35 mi5940+65347+75347+76565(Top 25%)5291(Top 35%)5291(Top 235%)
Finish26.22 mi1.02 mi5985-455370-235370-238563(Top 32%)6493(Top 43%)6493(Top 288%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 21%
×21story building
+97ft-345ft

Overall

5481

Males

5050

M45-49

5050

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6033

Males

5488

M45-49

5488

10K→15K

6.2 - 9.3 mi

Top 21%
×3story building
+67ft-78ft

Overall

5481

Males

5050

M45-49

5050

15K→20K

9.3 - 12.4 mi

Top 22%
×5story building
+106ft-86ft

Overall

5919

Males

5410

M45-49

5410

20K→Half

12.4 - 13.1 mi

Top 23%
×2story building
+19ft-37ft

Overall

6188

Males

5631

M45-49

5631

Half→25K

13.1 - 15.5 mi

Top 23%
×4story building
+66ft-88ft

Overall

6041

Males

5477

M45-49

5477

25K→30K

15.5 - 18.6 mi

Top 24%
×9story building
+181ft-148ft

Overall

6418

Males

5671

M45-49

5671

30K→20M

18.6 - 20.0 mi

Top 21%
×5story building
+64ft-50ft

Overall

5557

Males

4969

M45-49

4969

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6159

Males

5307

M45-49

5307

21M→35K

21.0 - 21.8 mi

Top 27%
×7story building
+17ft-86ft

Overall

7127

Males

5967

M45-49

5967

35K→23M

21.8 - 23.0 mi

Top 24%
×5story building
+23ft-63ft

Overall

6296

Males

5368

M45-49

5368

23M→24M

23.0 - 24.0 mi

Top 26%
×6story building
+12ft-82ft

Overall

6903

Males

5656

M45-49

5656

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6222

Males

5157

M45-49

5157

40K→25.2M

24.9 - 25.2 mi

Top 25%
×1story
+13ft-16ft

Overall

6565

Males

5291

M45-49

5291

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

8563

Males

6493

M45-49

6493

Passing Analysis

Category:
Athletes Passed
1999
Passed By
599
Net Change
+1400
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7385
5K → 10K70426+678#7385#6707
10K → 15K3997+392#6707#6315
15K → 20K16544+121#6315#6194
20K → Half2023-3#6194#6197
Half → 25K9361+32#6197#6165
25K → 30K126120+6#6165#6159
30K → 20M11316+97#6159#6062
20M → 21M6835+33#6062#6029
21M → 35K39390#6029#6029
35K → 23M8142+39#6029#5990
23M → 24M5751+6#5990#5984
24M → 40K7032+38#5984#5946
40K → 25.2M2216+6#5946#5940
25.2M → Finish4287-45#5940#5985
TOTALS1999599+1400
📊

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