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BOSTON MARATHON 2023

Yanlai Chen

Bib: 9073•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 19%
Gender (Male)
#0 / 15176
Top 31%
Masters (Masters Men)
#0 / 9891
Top 17%
Division (M40-44)
#0 / 2241
Top 41%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:51
Rank: #6445
Start → 5K
21:51 | 7:02/mi
10K· 6.21 mi
42:26
Rank: #5208 (+1237)
5K → 10K
20:35 | 6:38/mi
15K· 9.32 mi
1:03:23
Rank: #5007 (+201)
10K → 15K
20:57 | 6:45/mi
20K· 12.43 mi
1:24:50
Rank: #5094 (-87)
15K → 20K
21:27 | 6:54/mi
Half· 13.11 mi
1:29:19
Rank: #4975 (+119)
20K → Half
4:29 | 6:34/mi
25K· 15.53 mi
1:46:13
Rank: #5073 (-98)
Half → 25K
16:54 | 6:58/mi
30K· 18.64 mi
2:08:23
Rank: #5061 (+12)
25K → 30K
22:10 | 7:08/mi
20M
2:18:27
Rank: #5172 (-111)
30K → 20M
10:04 | 7:24/mi
21M
2:26:24
Rank: #5226 (-54)
20M → 21M
7:57 | 7:57/mi
35K· 21.75 mi
2:31:32
Rank: #5175 (+51)
21M → 35K
5:08 | 6:52/mi
23M
2:40:55
Rank: #5207 (-32)
35K → 23M
9:23 | 7:30/mi
24M
2:48:03
Rank: #5154 (+53)
23M → 24M
7:08 | 7:08/mi
40K· 24.85 mi
2:54:20
Rank: #5138 (+16)
24M → 40K
6:17 | 7:21/mi
25.2M
2:57:09
Rank: #5139 (-1)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:04:41
Rank: #5184 (-45)
25.2M → Finish
7:32 | 7:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:19
Pace6:49 /mi
2nd Half
Distance13.11 mi
Time1:35:22
Pace7:16 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:0121:517:0221:51
7:02
-
10K
6.21 mi11:08:3642:266:5020:35
6:38
-0:24
15K
9.32 mi11:29:331:03:236:4820:57
6:45
+0:07
20K
12.43 mi11:51:001:24:506:5021:27
6:54
+0:09
Half
13.11 mi11:55:291:29:196:494:29
6:34
-0:20
25K
15.53 mi12:12:231:46:136:5016:54
6:58
+0:24
30K
18.64 mi12:34:332:08:236:5322:10
7:08
+0:10
20M
20.00 mi12:44:372:18:276:5510:04
7:24
+0:16
21M
21.00 mi12:52:342:26:246:587:57
7:57
+0:33
35K
21.75 mi12:57:422:31:326:585:08
6:52
-1:05
23M
23.00 mi13:07:052:40:557:009:23
7:30
+0:38
24M
24.00 mi13:14:132:48:037:007:08
7:08
-0:22
40K
24.85 mi13:20:302:54:207:016:17
7:21
+0:13
25.2M
25.20 mi13:23:192:57:097:022:49
8:10
+0:49
Finish
26.22 mi13:30:513:04:417:037:32
7:24
-0:46

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

6:34 /mi

Average Pace

7:03 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:12:36

39% of race

Time at Steady Pace

1:14:20

40% of race

Time at Slower Pace

37:45

20% of race

Average Pace: 7:03 /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 mi10:48:0121:517:0221:51
7:02
#6445
10K
6.21 mi11:08:3642:266:5020:35
6:38
#5208
15K
9.32 mi11:29:331:03:236:4820:57
6:45
#5007
20K
12.43 mi11:51:001:24:506:5021:27
6:54
#5094
Half
13.11 mi11:55:291:29:196:494:29
6:34
#4975
25K
15.53 mi12:12:231:46:136:5016:54
6:58
#5073
30K
18.64 mi12:34:332:08:236:5322:10
7:08
#5061
20M
20.00 mi12:44:372:18:276:5510:04
7:24
#5172
21M
21.00 mi12:52:342:26:246:587:57
7:57
#5226
35K
21.75 mi12:57:422:31:326:585:08
6:52
#5175
23M
23.00 mi13:07:052:40:557:009:23
7:30
#5207
24M
24.00 mi13:14:132:48:037:007:08
7:08
#5154
40K
24.85 mi13:20:302:54:207:016:17
7:21
#5138
25.2M
25.20 mi13:23:192:57:097:022:49
8:10
#5139
Finish
26.22 mi13:30:513:04:417:037:32
7:24
#5184
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi6445584358434551(Top 17%)4250(Top 28%)4250(Top 190%)
10K6.21 mi3.10 mi5208+12374823+10204823+10203692(Top 14%)3488(Top 23%)3488(Top 156%)
15K9.32 mi3.11 mi5007+2014649+1744649+1744551(Top 17%)4250(Top 28%)4250(Top 190%)
20K12.43 mi3.11 mi5094-874727-784727-785375(Top 20%)4963(Top 33%)4963(Top 221%)
Half13.11 mi0.68 mi4975+1194627+1004627+1003282(Top 12%)3132(Top 21%)3132(Top 140%)
25K15.53 mi2.42 mi5073-984708-814708-815406(Top 20%)4981(Top 33%)4981(Top 222%)
30K18.64 mi3.11 mi5061+124693+154693+155113(Top 19%)4692(Top 31%)4692(Top 209%)
20M20.00 mi1.36 mi5172-1114783-904783-906193(Top 23%)5434(Top 36%)5434(Top 242%)
21M21.00 mi1.00 mi5226-544822-394822-396994(Top 26%)5850(Top 39%)5850(Top 261%)
35K21.75 mi0.75 mi5175+514770+524770+524583(Top 17%)4174(Top 28%)4174(Top 186%)
23M23.00 mi1.25 mi5207-324786-164786-166360(Top 24%)5410(Top 36%)5410(Top 241%)
24M24.00 mi1.00 mi5154+534735+514735+515359(Top 20%)4684(Top 31%)4684(Top 209%)
40K24.85 mi0.85 mi5138+164718+174718+175723(Top 21%)4839(Top 32%)4839(Top 216%)
25.2M25.20 mi0.35 mi5139-14716+24716+27401(Top 28%)5801(Top 38%)5801(Top 259%)
Finish26.22 mi1.02 mi5184-454748-324748-327697(Top 29%)5983(Top 39%)5983(Top 267%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21stories
+97ft-345ft

Overall

4551

Males

4250

M40-44

4250

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3692

Males

3488

M40-44

3488

10K→15K

6.2 - 9.3 mi

Top 17%
×3stories
+67ft-78ft

Overall

4551

Males

4250

M40-44

4250

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5375

Males

4963

M40-44

4963

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3282

Males

3132

M40-44

3132

Half→25K

13.1 - 15.5 mi

Top 20%
×4stories
+66ft-88ft

Overall

5406

Males

4981

M40-44

4981

25K→30K

15.5 - 18.6 mi

Top 19%
×9stories
+181ft-148ft

Overall

5113

Males

4692

M40-44

4692

30K→20M

18.6 - 20.0 mi

Top 23%
×5stories
+64ft-50ft

Overall

6193

Males

5434

M40-44

5434

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

6994

Males

5850

M40-44

5850

21M→35K

21.0 - 21.8 mi

Top 17%
×7stories
+17ft-86ft

Overall

4583

Males

4174

M40-44

4174

35K→23M

21.8 - 23.0 mi

Top 24%
×5stories
+23ft-63ft

Overall

6360

Males

5410

M40-44

5410

23M→24M

23.0 - 24.0 mi

Top 20%
×6stories
+12ft-82ft

Overall

5359

Males

4684

M40-44

4684

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5723

Males

4839

M40-44

4839

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7401

Males

5801

M40-44

5801

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2stories
+22ft-21ft

Overall

7697

Males

5983

M40-44

5983

Passing Analysis

Category:
Athletes Passed
2273
Passed By
1012
Net Change
+1261
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6445
5K → 10K12447+1237#6445#5208
10K → 15K23635+201#5208#5007
15K → 20K85172-87#5007#5094
20K → Half1201+119#5094#4975
Half → 25K76174-98#4975#5073
25K → 30K139127+12#5073#5061
30K → 20M42153-111#5061#5172
20M → 21M4195-54#5172#5226
21M → 35K598+51#5226#5175
35K → 23M5183-32#5175#5207
23M → 24M7926+53#5207#5154
24M → 40K5539+16#5154#5138
40K → 25.2M2122-1#5138#5139
25.2M → Finish2570-45#5139#5184
TOTALS22731012+1261
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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