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BOSTON MARATHON 2023

Yefeng Shen

Bib: 4575•M

OR

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 23%
Gender (Male)
#0 / 15176
Top 36%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:36
Rank: #7947
Start → 5K
22:36 | 7:16/mi
10K· 6.21 mi
44:46
Rank: #7792 (+155)
5K → 10K
22:10 | 7:08/mi
15K· 9.32 mi
1:06:44
Rank: #7479 (+313)
10K → 15K
21:58 | 7:04/mi
20K· 12.43 mi
1:29:07
Rank: #7350 (+129)
15K → 20K
22:23 | 7:12/mi
Half· 13.11 mi
1:33:45
Rank: #7239 (+111)
20K → Half
4:38 | 6:47/mi
25K· 15.53 mi
1:51:15
Rank: #7132 (+107)
Half → 25K
17:30 | 7:13/mi
30K· 18.64 mi
2:14:48
Rank: #7166 (-34)
25K → 30K
23:33 | 7:35/mi
20M
2:24:33
Rank: #6987 (+179)
30K → 20M
9:45 | 7:10/mi
21M
2:32:07
Rank: #6839 (+148)
20M → 21M
7:34 | 7:34/mi
35K· 21.75 mi
2:37:13
Rank: #6718 (+121)
21M → 35K
5:06 | 6:49/mi
23M
2:46:04
Rank: #6532 (+186)
35K → 23M
8:51 | 7:04/mi
24M
2:53:08
Rank: #6413 (+119)
23M → 24M
7:04 | 7:04/mi
40K· 24.85 mi
2:59:22
Rank: #6335 (+78)
24M → 40K
6:14 | 7:17/mi
25.2M
3:01:56
Rank: #6276 (+59)
40K → 25.2M
2:34 | 7:27/mi
Finish· 26.22 mi
3:08:53
Rank: #6155 (+121)
25.2M → Finish
6:57 | 6:49/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:45
Pace7:09 /mi
2nd Half
Distance13.11 mi
Time1:35:08
Pace7:15 /mi
📊Positive Split: 1.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:4322:367:1622:36
7:16
-
10K
6.21 mi10:46:5344:467:1222:10
7:08
-0:08
15K
9.32 mi11:08:511:06:447:1021:58
7:04
-0:04
20K
12.43 mi11:31:141:29:077:1022:23
7:12
+0:08
Half
13.11 mi11:35:521:33:457:094:38
6:47
-0:25
25K
15.53 mi11:53:221:51:157:1017:30
7:13
+0:26
30K
18.64 mi12:16:552:14:487:1423:33
7:35
+0:22
20M
20.00 mi12:26:402:24:337:149:45
7:10
-0:25
21M
21.00 mi12:34:142:32:077:157:34
7:34
+0:24
35K
21.75 mi12:39:202:37:137:145:06
6:49
-0:45
23M
23.00 mi12:48:112:46:047:138:51
7:04
+0:15
24M
24.00 mi12:55:152:53:087:137:04
7:04
0:00
40K
24.85 mi13:01:292:59:227:136:14
7:17
+0:13
25.2M
25.20 mi13:04:033:01:567:132:34
7:27
+0:10
Finish
26.22 mi13:11:003:08:537:136:57
6:49
-0:38

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

6:47 /mi

Average Pace

7:13 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:37:46

84% of race

Time at Steady Pace

31:07

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:12 /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 mi10:24:4322:367:1622:36
7:16
#7947
10K
6.21 mi10:46:5344:467:1222:10
7:08
#7792
15K
9.32 mi11:08:511:06:447:1021:58
7:04
#7479
20K
12.43 mi11:31:141:29:077:1022:23
7:12
#7350
Half
13.11 mi11:35:521:33:457:094:38
6:47
#7239
25K
15.53 mi11:53:221:51:157:1017:30
7:13
#7132
30K
18.64 mi12:16:552:14:487:1423:33
7:35
#7166
20M
20.00 mi12:26:402:24:337:149:45
7:10
#6987
21M
21.00 mi12:34:142:32:077:157:34
7:34
#6839
35K
21.75 mi12:39:202:37:137:145:06
6:49
#6718
23M
23.00 mi12:48:112:46:047:138:51
7:04
#6532
24M
24.00 mi12:55:152:53:087:137:04
7:04
#6413
40K
24.85 mi13:01:292:59:227:136:14
7:17
#6335
25.2M
25.20 mi13:04:033:01:567:132:34
7:27
#6276
Finish
26.22 mi13:11:003:08:537:136:57
6:49
#6155
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi7947693969396963(Top 26%)6219(Top 41%)6219(Top 118%)
10K6.21 mi3.10 mi7792+1556834+1056834+1057646(Top 29%)6697(Top 44%)6697(Top 127%)
15K9.32 mi3.11 mi7479+3136606+2286606+2286963(Top 26%)6219(Top 41%)6219(Top 118%)
20K12.43 mi3.11 mi7350+1296504+1026504+1027116(Top 27%)6294(Top 41%)6294(Top 119%)
Half13.11 mi0.68 mi7239+1116421+836421+835227(Top 20%)4837(Top 32%)4837(Top 92%)
25K15.53 mi2.42 mi7132+1076328+936328+936757(Top 25%)5974(Top 39%)5974(Top 113%)
30K18.64 mi3.11 mi7166-346342-146342-147782(Top 29%)6556(Top 43%)6556(Top 124%)
20M20.00 mi1.36 mi6987+1796199+1436199+1435001(Top 19%)4547(Top 30%)4547(Top 86%)
21M21.00 mi1.00 mi6839+1486076+1236076+1234920(Top 18%)4423(Top 29%)4423(Top 84%)
35K21.75 mi0.75 mi6718+1215972+1045972+1044345(Top 16%)3980(Top 26%)3980(Top 75%)
23M23.00 mi1.25 mi6532+1865820+1525820+1524155(Top 16%)3811(Top 25%)3811(Top 72%)
24M24.00 mi1.00 mi6413+1195718+1025718+1025023(Top 19%)4441(Top 29%)4441(Top 84%)
40K24.85 mi0.85 mi6335+785652+665652+665383(Top 20%)4613(Top 30%)4613(Top 87%)
25.2M25.20 mi0.35 mi6276+595599+535599+533680(Top 14%)3308(Top 22%)3308(Top 63%)
Finish26.22 mi1.02 mi6155+1215496+1035496+1034198(Top 16%)3702(Top 24%)3702(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21stories
+97ft-345ft

Overall

6963

Males

6219

M18-39

6219

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

7646

Males

6697

M18-39

6697

10K→15K

6.2 - 9.3 mi

Top 26%
×3stories
+67ft-78ft

Overall

6963

Males

6219

M18-39

6219

15K→20K

9.3 - 12.4 mi

Top 27%
×5stories
+106ft-86ft

Overall

7116

Males

6294

M18-39

6294

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5227

Males

4837

M18-39

4837

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

6757

Males

5974

M18-39

5974

25K→30K

15.5 - 18.6 mi

Top 29%
×9stories
+181ft-148ft

Overall

7782

Males

6556

M18-39

6556

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5001

Males

4547

M18-39

4547

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

4920

Males

4423

M18-39

4423

21M→35K

21.0 - 21.8 mi

Top 16%
×7stories
+17ft-86ft

Overall

4345

Males

3980

M18-39

3980

35K→23M

21.8 - 23.0 mi

Top 16%
×5stories
+23ft-63ft

Overall

4155

Males

3811

M18-39

3811

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5023

Males

4441

M18-39

4441

24M→40K

24.0 - 24.9 mi

Top 20%
×1story
+6ft-20ft

Overall

5383

Males

4613

M18-39

4613

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

3680

Males

3308

M18-39

3308

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4198

Males

3702

M18-39

3702

Passing Analysis

Category:
Athletes Passed
2269
Passed By
477
Net Change
+1792
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7947
5K → 10K321166+155#7947#7792
10K → 15K34330+313#7792#7479
15K → 20K18253+129#7479#7350
20K → Half1110+111#7350#7239
Half → 25K14437+107#7239#7132
25K → 30K111145-34#7132#7166
30K → 20M1823+179#7166#6987
20M → 21M1502+148#6987#6839
21M → 35K1221+121#6839#6718
35K → 23M1904+186#6718#6532
23M → 24M1245+119#6532#6413
24M → 40K9820+78#6413#6335
40K → 25.2M623+59#6335#6276
25.2M → Finish1298+121#6276#6155
TOTALS2269477+1792
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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