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BOSTON MARATHON 2023

Kun Song

Bib: 10381•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 40%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 44%
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:27
Rank: #10050
Start → 5K
23:27 | 7:33/mi
10K· 6.21 mi
46:43
Rank: #10207 (-157)
5K → 10K
23:16 | 7:29/mi
15K· 9.32 mi
1:09:59
Rank: #10136 (+71)
10K → 15K
23:16 | 7:29/mi
20K· 12.43 mi
1:33:29
Rank: #10027 (+109)
15K → 20K
23:30 | 7:34/mi
Half· 13.11 mi
1:38:34
Rank: #10003 (+24)
20K → Half
5:05 | 7:27/mi
25K· 15.53 mi
1:57:01
Rank: #9913 (+90)
Half → 25K
18:27 | 7:37/mi
30K· 18.64 mi
2:21:44
Rank: #9997 (-84)
25K → 30K
24:43 | 7:57/mi
20M
2:32:47
Rank: #10064 (-67)
30K → 20M
11:03 | 8:08/mi
21M
2:41:40
Rank: #10203 (-139)
20M → 21M
8:53 | 8:53/mi
35K· 21.75 mi
2:47:32
Rank: #10227 (-24)
21M → 35K
5:52 | 7:51/mi
23M
2:57:54
Rank: #10281 (-54)
35K → 23M
10:22 | 8:17/mi
24M
3:06:00
Rank: #10338 (-57)
23M → 24M
8:06 | 8:06/mi
40K· 24.85 mi
3:13:13
Rank: #10428 (-90)
24M → 40K
7:13 | 8:26/mi
25.2M
3:16:21
Rank: #10465 (-37)
40K → 25.2M
3:08 | 9:05/mi
Finish· 26.22 mi
3:24:35
Rank: #10531 (-66)
25.2M → Finish
8:14 | 8:05/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:34
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time1:46:01
Pace8:05 /mi
📊Positive Split: 7.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5723:277:3323:27
7:33
-
10K
6.21 mi11:13:1346:437:3123:16
7:29
-0:04
15K
9.32 mi11:36:291:09:597:3123:16
7:29
0:00
20K
12.43 mi11:59:591:33:297:3123:30
7:34
+0:05
Half
13.11 mi12:05:041:38:347:315:05
7:27
-0:07
25K
15.53 mi12:23:311:57:017:3218:27
7:37
+0:10
30K
18.64 mi12:48:142:21:447:3624:43
7:57
+0:20
20M
20.00 mi12:59:172:32:477:3811:03
8:08
+0:11
21M
21.00 mi13:08:102:41:407:428:53
8:53
+0:45
35K
21.75 mi13:14:022:47:327:425:52
7:51
-1:02
23M
23.00 mi13:24:242:57:547:4410:22
8:17
+0:26
24M
24.00 mi13:32:303:06:007:458:06
8:06
-0:11
40K
24.85 mi13:39:433:13:137:467:13
8:26
+0:20
25.2M
25.20 mi13:42:513:16:217:483:08
9:05
+0:39
Finish
26.22 mi13:51:053:24:357:498:14
8:05
-1:00

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

7:27 /mi

Average Pace

7:49 /mi

Slowest Pace

9:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:01

57% of race

Time at Steady Pace

57:58

28% of race

Time at Slower Pace

29:36

14% of race

Average Pace: 7:48 /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 mi10:49:5723:277:3323:27
7:33
#10050
10K
6.21 mi11:13:1346:437:3123:16
7:29
#10207
15K
9.32 mi11:36:291:09:597:3123:16
7:29
#10136
20K
12.43 mi11:59:591:33:297:3123:30
7:34
#10027
Half
13.11 mi12:05:041:38:347:315:05
7:27
#10003
25K
15.53 mi12:23:311:57:017:3218:27
7:37
#9913
30K
18.64 mi12:48:142:21:447:3624:43
7:57
#9997
20M
20.00 mi12:59:172:32:477:3811:03
8:08
#10064
21M
21.00 mi13:08:102:41:407:428:53
8:53
#10203
35K
21.75 mi13:14:022:47:327:425:52
7:51
#10227
23M
23.00 mi13:24:242:57:547:4410:22
8:17
#10281
24M
24.00 mi13:32:303:06:007:458:06
8:06
#10338
40K
24.85 mi13:39:433:13:137:467:13
8:26
#10428
25.2M
25.20 mi13:42:513:16:217:483:08
9:05
#10465
Finish
26.22 mi13:51:053:24:357:498:14
8:05
#10531
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi100508154815410080(Top 38%)8189(Top 54%)8189(Top 364%)
10K6.21 mi3.10 mi10207-1578263-1098263-10910353(Top 39%)8359(Top 55%)8359(Top 371%)
15K9.32 mi3.11 mi10136+718244+198244+1910080(Top 38%)8189(Top 54%)8189(Top 364%)
20K12.43 mi3.11 mi10027+1098174+708174+709806(Top 37%)7967(Top 52%)7967(Top 354%)
Half13.11 mi0.68 mi10003+248155+198155+199801(Top 37%)7994(Top 53%)7994(Top 355%)
25K15.53 mi2.42 mi9913+908083+728083+729614(Top 36%)7774(Top 51%)7774(Top 345%)
30K18.64 mi3.11 mi9997-848094-118094-1110533(Top 40%)8114(Top 53%)8114(Top 360%)
20M20.00 mi1.36 mi10064-678098-48098-411212(Top 42%)8360(Top 55%)8360(Top 371%)
21M21.00 mi1.00 mi10203-1398144-468144-4612724(Top 48%)8899(Top 59%)8899(Top 395%)
35K21.75 mi0.75 mi10227-248139+58139+510921(Top 41%)8070(Top 53%)8070(Top 358%)
23M23.00 mi1.25 mi10281-548134+58134+511713(Top 44%)8331(Top 55%)8331(Top 370%)
24M24.00 mi1.00 mi10338-578130+48130+411905(Top 45%)8346(Top 55%)8346(Top 371%)
40K24.85 mi0.85 mi10428-908142-128142-1212940(Top 49%)8746(Top 58%)8746(Top 388%)
25.2M25.20 mi0.35 mi10465-378148-68148-612937(Top 49%)8717(Top 57%)8717(Top 387%)
Finish26.22 mi1.02 mi10531-668151-38151-312627(Top 47%)8587(Top 57%)8587(Top 381%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21stories
+97ft-345ft

Overall

10080

Males

8189

M45-49

8189

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

10353

Males

8359

M45-49

8359

10K→15K

6.2 - 9.3 mi

Top 38%
×3stories
+67ft-78ft

Overall

10080

Males

8189

M45-49

8189

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

9806

Males

7967

M45-49

7967

20K→Half

12.4 - 13.1 mi

Top 37%
×2stories
+19ft-37ft

Overall

9801

Males

7994

M45-49

7994

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

9614

Males

7774

M45-49

7774

25K→30K

15.5 - 18.6 mi

Top 40%
×9stories
+181ft-148ft

Overall

10533

Males

8114

M45-49

8114

30K→20M

18.6 - 20.0 mi

Top 42%
×5stories
+64ft-50ft

Overall

11212

Males

8360

M45-49

8360

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

12724

Males

8899

M45-49

8899

21M→35K

21.0 - 21.8 mi

Top 41%
×7stories
+17ft-86ft

Overall

10921

Males

8070

M45-49

8070

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

11713

Males

8331

M45-49

8331

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

11905

Males

8346

M45-49

8346

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

12940

Males

8746

M45-49

8746

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

12937

Males

8717

M45-49

8717

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2stories
+22ft-21ft

Overall

12627

Males

8587

M45-49

8587

Passing Analysis

Category:
Athletes Passed
1393*
Passed By
1873
Net Change
-481
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10050
5K → 10K241398-157#10050#10207
10K → 15K210139+71#10207#10136
15K → 20K226*117+109#10136#10027
20K → Half3814+24#10027#10003
Half → 25K156*66+90#10003#9913
25K → 30K127*211-84#9913#9997
30K → 20M72138-67#9997#10064
20M → 21M46185-139#10064#10203
21M → 35K4165-24#10203#10227
35K → 23M70124-54#10227#10281
23M → 24M43100-57#10281#10338
24M → 40K43133-90#10338#10428
40K → 25.2M2360-37#10428#10465
25.2M → Finish57123-66#10465#10531
TOTALS1393*1873-481

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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