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BOSTON MARATHON 2023

Shifang Sun

Bib: 18314•M

GA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 49%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
Top 43%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:06
Rank: #14538
Start → 5K
25:06 | 8:05/mi
10K· 6.21 mi
49:35
Rank: #14234 (+304)
5K → 10K
24:29 | 7:53/mi
15K· 9.32 mi
1:14:06
Rank: #13968 (+266)
10K → 15K
24:31 | 7:53/mi
20K· 12.43 mi
1:38:52
Rank: #13736 (+232)
15K → 20K
24:46 | 7:58/mi
Half· 13.11 mi
1:44:14
Rank: #13712 (+24)
20K → Half
5:22 | 7:52/mi
25K· 15.53 mi
2:03:52
Rank: #13662 (+50)
Half → 25K
19:38 | 8:06/mi
30K· 18.64 mi
2:29:52
Rank: #13594 (+68)
25K → 30K
26:00 | 8:22/mi
20M
2:41:38
Rank: #13680 (-86)
30K → 20M
11:46 | 8:40/mi
21M
2:51:01
Rank: #13786 (-106)
20M → 21M
9:23 | 9:23/mi
35K· 21.75 mi
2:56:56
Rank: #13680 (+106)
21M → 35K
5:55 | 7:55/mi
23M
3:07:17
Rank: #13539 (+141)
35K → 23M
10:21 | 8:16/mi
24M
3:15:13
Rank: #13363 (+176)
23M → 24M
7:56 | 7:56/mi
40K· 24.85 mi
3:22:16
Rank: #13281 (+82)
24M → 40K
7:03 | 8:15/mi
25.2M
3:25:11
Rank: #13195 (+86)
40K → 25.2M
2:55 | 8:27/mi
Finish· 26.22 mi
3:33:14
Rank: #13118 (+77)
25.2M → Finish
8:03 | 7:54/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:14
Pace7:57 /mi
2nd Half
Distance13.11 mi
Time1:49:00
Pace8:19 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:2925:068:0525:06
8:05
-
10K
6.21 mi11:40:5849:357:5924:29
7:53
-0:12
15K
9.32 mi12:05:291:14:067:5724:31
7:53
0:00
20K
12.43 mi12:30:151:38:527:5724:46
7:58
+0:05
Half
13.11 mi12:35:371:44:147:575:22
7:52
-0:06
25K
15.53 mi12:55:152:03:527:5819:38
8:06
+0:14
30K
18.64 mi13:21:152:29:528:0226:00
8:22
+0:16
20M
20.00 mi13:33:012:41:388:0511:46
8:40
+0:18
21M
21.00 mi13:42:242:51:018:099:23
9:23
+0:43
35K
21.75 mi13:48:192:56:568:085:55
7:55
-1:28
23M
23.00 mi13:58:403:07:178:0910:21
8:16
+0:21
24M
24.00 mi14:06:363:15:138:087:56
7:56
-0:20
40K
24.85 mi14:13:393:22:168:087:03
8:15
+0:19
25.2M
25.20 mi14:16:343:25:118:092:55
8:27
+0:12
Finish
26.22 mi14:24:373:33:148:088:03
7:54
-0:33

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

7:52 /mi

Average Pace

8:08 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:12:05

90% of race

Time at Steady Pace

11:46

6% of race

Time at Slower Pace

9:23

4% of race

Average Pace: 8:08 /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 mi11:16:2925:068:0525:06
8:05
#14538
10K
6.21 mi11:40:5849:357:5924:29
7:53
#14234
15K
9.32 mi12:05:291:14:067:5724:31
7:53
#13968
20K
12.43 mi12:30:151:38:527:5724:46
7:58
#13736
Half
13.11 mi12:35:371:44:147:575:22
7:52
#13712
25K
15.53 mi12:55:152:03:527:5819:38
8:06
#13662
30K
18.64 mi13:21:152:29:528:0226:00
8:22
#13594
20M
20.00 mi13:33:012:41:388:0511:46
8:40
#13680
21M
21.00 mi13:42:242:51:018:099:23
9:23
#13786
35K
21.75 mi13:48:192:56:568:085:55
7:55
#13680
23M
23.00 mi13:58:403:07:178:0910:21
8:16
#13539
24M
24.00 mi14:06:363:15:138:087:56
7:56
#13363
40K
24.85 mi14:13:393:22:168:087:03
8:15
#13281
25.2M
25.20 mi14:16:343:25:118:092:55
8:27
#13195
Finish
26.22 mi14:24:373:33:148:088:03
7:54
#13118
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi14538101661016613438(Top 50%)9675(Top 64%)9675(Top 680%)
10K6.21 mi3.10 mi14234+30410027+13910027+13913800(Top 52%)9858(Top 65%)9858(Top 693%)
15K9.32 mi3.11 mi13968+2669910+1179910+11713438(Top 50%)9675(Top 64%)9675(Top 680%)
20K12.43 mi3.11 mi13736+2329793+1179793+11713189(Top 50%)9524(Top 63%)9524(Top 670%)
Half13.11 mi0.68 mi13712+249782+119782+1113258(Top 50%)9588(Top 63%)9588(Top 674%)
25K15.53 mi2.42 mi13662+509737+459737+4513480(Top 51%)9549(Top 63%)9549(Top 672%)
30K18.64 mi3.11 mi13594+689681+569681+5613457(Top 51%)9435(Top 62%)9435(Top 664%)
20M20.00 mi1.36 mi13680-869695-149695-1414599(Top 55%)9811(Top 65%)9811(Top 690%)
21M21.00 mi1.00 mi13786-1069721-269721-2615378(Top 58%)10085(Top 66%)10085(Top 709%)
35K21.75 mi0.75 mi13680+1069668+539668+5311442(Top 43%)8332(Top 55%)8332(Top 586%)
23M23.00 mi1.25 mi13539+1419582+869582+8611628(Top 44%)8302(Top 55%)8302(Top 584%)
24M24.00 mi1.00 mi13363+1769491+919491+9110768(Top 40%)7791(Top 51%)7791(Top 548%)
40K24.85 mi0.85 mi13281+829436+559436+5511655(Top 44%)8157(Top 54%)8157(Top 574%)
25.2M25.20 mi0.35 mi13195+869382+549382+549248(Top 35%)6908(Top 46%)6908(Top 486%)
Finish26.22 mi1.02 mi13118+779333+499333+4911381(Top 43%)7983(Top 53%)7983(Top 561%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

13438

Males

9675

M55-59

9675

5K→10K

3.1 - 6.2 mi

Top 52%
×5stories
+79ft-138ft

Overall

13800

Males

9858

M55-59

9858

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

13438

Males

9675

M55-59

9675

15K→20K

9.3 - 12.4 mi

Top 50%
×5stories
+106ft-86ft

Overall

13189

Males

9524

M55-59

9524

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

13258

Males

9588

M55-59

9588

Half→25K

13.1 - 15.5 mi

Top 51%
×4stories
+66ft-88ft

Overall

13480

Males

9549

M55-59

9549

25K→30K

15.5 - 18.6 mi

Top 51%
×9stories
+181ft-148ft

Overall

13457

Males

9435

M55-59

9435

30K→20M

18.6 - 20.0 mi

Top 55%
×5stories
+64ft-50ft

Overall

14599

Males

9811

M55-59

9811

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

15378

Males

10085

M55-59

10085

21M→35K

21.0 - 21.8 mi

Top 43%
×7stories
+17ft-86ft

Overall

11442

Males

8332

M55-59

8332

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

11628

Males

8302

M55-59

8302

23M→24M

23.0 - 24.0 mi

Top 40%
×6stories
+12ft-82ft

Overall

10768

Males

7791

M55-59

7791

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

11655

Males

8157

M55-59

8157

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

9248

Males

6908

M55-59

6908

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2stories
+22ft-21ft

Overall

11381

Males

7983

M55-59

7983

Passing Analysis

Category:
Athletes Passed
2417
Passed By
997
Net Change
+1420
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14538
5K → 10K478174+304#14538#14234
10K → 15K34276+266#14234#13968
15K → 20K29664+232#13968#13736
20K → Half4117+24#13736#13712
Half → 25K160110+50#13712#13662
25K → 30K221153+68#13662#13594
30K → 20M70156-86#13594#13680
20M → 21M57163-106#13680#13786
21M → 35K1115+106#13786#13680
35K → 23M16625+141#13680#13539
23M → 24M1826+176#13539#13363
24M → 40K10220+82#13363#13281
40K → 25.2M882+86#13281#13195
25.2M → Finish10326+77#13195#13118
TOTALS2417997+1420
📊

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