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BOSTON MARATHON 2023

Guangzhen Xing

Bib: 18203•M

GA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:43
Rank: #15987
Start → 5K
25:43 | 8:17/mi
10K· 6.21 mi
51:17
Rank: #16188 (-201)
5K → 10K
25:34 | 8:14/mi
15K· 9.32 mi
1:16:54
Rank: #16184 (+4)
10K → 15K
25:37 | 8:15/mi
20K· 12.43 mi
1:42:37
Rank: #15961 (+223)
15K → 20K
25:43 | 8:17/mi
Half· 13.11 mi
1:48:13
Rank: #15944 (+17)
20K → Half
5:36 | 8:12/mi
25K· 15.53 mi
2:08:31
Rank: #15843 (+101)
Half → 25K
20:18 | 8:22/mi
30K· 18.64 mi
2:35:29
Rank: #15755 (+88)
25K → 30K
26:58 | 8:41/mi
20M
2:47:20
Rank: #15655 (+100)
30K → 20M
11:51 | 8:43/mi
21M
2:57:00
Rank: #15711 (-56)
20M → 21M
9:40 | 9:40/mi
35K· 21.75 mi
3:03:33
Rank: #15745 (-34)
21M → 35K
6:33 | 8:45/mi
23M
3:14:55
Rank: #15764 (-19)
35K → 23M
11:22 | 9:05/mi
24M
3:23:51
Rank: #15840 (-76)
23M → 24M
8:56 | 8:56/mi
40K· 24.85 mi
3:31:57
Rank: #15940 (-100)
24M → 40K
8:06 | 9:28/mi
25.2M
3:35:35
Rank: #16015 (-75)
40K → 25.2M
3:38 | 10:32/mi
Finish· 26.22 mi
3:44:31
Rank: #16053 (-38)
25.2M → Finish
8:56 | 8:46/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:13
Pace8:15 /mi
2nd Half
Distance13.11 mi
Time1:56:18
Pace8:52 /mi
📊Positive Split: 7.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:3525:438:1725:43
8:17
-
10K
6.21 mi11:49:0951:178:1525:34
8:14
-0:03
15K
9.32 mi12:14:461:16:548:1525:37
8:15
+0:01
20K
12.43 mi12:40:291:42:378:1525:43
8:17
+0:02
Half
13.11 mi12:46:051:48:138:155:36
8:12
-0:05
25K
15.53 mi13:06:232:08:318:1620:18
8:22
+0:10
30K
18.64 mi13:33:212:35:298:2026:58
8:41
+0:19
20M
20.00 mi13:45:122:47:208:2211:51
8:43
+0:02
21M
21.00 mi13:54:522:57:008:269:40
9:40
+0:57
35K
21.75 mi14:01:253:03:338:266:33
8:45
-0:55
23M
23.00 mi14:12:473:14:558:2811:22
9:05
+0:20
24M
24.00 mi14:21:433:23:518:308:56
8:56
-0:09
40K
24.85 mi14:29:493:31:578:328:06
9:28
+0:32
25.2M
25.20 mi14:33:273:35:358:333:38
10:32
+1:04
Finish
26.22 mi14:42:233:44:318:348:56
8:46
-1:46

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

8:12 /mi

Average Pace

8:34 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:08:31

57% of race

Time at Steady Pace

1:03:14

28% of race

Time at Slower Pace

32:46

15% of race

Average Pace: 8:34 /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 mi11:23:3525:438:1725:43
8:17
#15987
10K
6.21 mi11:49:0951:178:1525:34
8:14
#16188
15K
9.32 mi12:14:461:16:548:1525:37
8:15
#16184
20K
12.43 mi12:40:291:42:378:1525:43
8:17
#15961
Half
13.11 mi12:46:051:48:138:155:36
8:12
#15944
25K
15.53 mi13:06:232:08:318:1620:18
8:22
#15843
30K
18.64 mi13:33:212:35:298:2026:58
8:41
#15755
20M
20.00 mi13:45:122:47:208:2211:51
8:43
#15655
21M
21.00 mi13:54:522:57:008:269:40
9:40
#15711
35K
21.75 mi14:01:253:03:338:266:33
8:45
#15745
23M
23.00 mi14:12:473:14:558:2811:22
9:05
#15764
24M
24.00 mi14:21:433:23:518:308:56
8:56
#15840
40K
24.85 mi14:29:493:31:578:328:06
9:28
#15940
25.2M
25.20 mi14:33:273:35:358:333:38
10:32
#16015
Finish
26.22 mi14:42:233:44:318:348:56
8:46
#16053
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi15987106941069416172(Top 61%)10757(Top 71%)10757(Top 756%)
10K6.21 mi3.10 mi16188-20110780-8610780-8616447(Top 62%)10885(Top 72%)10885(Top 765%)
15K9.32 mi3.11 mi16184+410764+1610764+1616172(Top 61%)10757(Top 71%)10757(Top 756%)
20K12.43 mi3.11 mi15961+22310660+10410660+10415462(Top 58%)10442(Top 69%)10442(Top 734%)
Half13.11 mi0.68 mi15944+1710650+1010650+1015826(Top 59%)10614(Top 70%)10614(Top 746%)
25K15.53 mi2.42 mi15843+10110584+6610584+6615409(Top 58%)10305(Top 68%)10305(Top 725%)
30K18.64 mi3.11 mi15755+8810506+7810506+7815386(Top 58%)10208(Top 67%)10208(Top 718%)
20M20.00 mi1.36 mi15655+10010451+5510451+5514974(Top 56%)9984(Top 66%)9984(Top 702%)
21M21.00 mi1.00 mi15711-5610439+1210439+1216692(Top 63%)10662(Top 70%)10662(Top 750%)
35K21.75 mi0.75 mi15745-3410443-410443-416676(Top 63%)10562(Top 70%)10562(Top 743%)
23M23.00 mi1.25 mi15764-1910425+1810425+1816424(Top 62%)10420(Top 69%)10420(Top 733%)
24M24.00 mi1.00 mi15840-7610439-1410439-1416906(Top 64%)10583(Top 70%)10583(Top 744%)
40K24.85 mi0.85 mi15940-10010474-3510474-3518227(Top 68%)11138(Top 73%)11138(Top 783%)
25.2M25.20 mi0.35 mi16015-7510506-3210506-3219165(Top 72%)11537(Top 76%)11537(Top 811%)
Finish26.22 mi1.02 mi16053-3810512-610512-616829(Top 63%)10530(Top 69%)10530(Top 741%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21stories
+97ft-345ft

Overall

16172

Males

10757

M55-59

10757

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

16447

Males

10885

M55-59

10885

10K→15K

6.2 - 9.3 mi

Top 61%
×3stories
+67ft-78ft

Overall

16172

Males

10757

M55-59

10757

15K→20K

9.3 - 12.4 mi

Top 58%
×5stories
+106ft-86ft

Overall

15462

Males

10442

M55-59

10442

20K→Half

12.4 - 13.1 mi

Top 59%
×2stories
+19ft-37ft

Overall

15826

Males

10614

M55-59

10614

Half→25K

13.1 - 15.5 mi

Top 58%
×4stories
+66ft-88ft

Overall

15409

Males

10305

M55-59

10305

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

15386

Males

10208

M55-59

10208

30K→20M

18.6 - 20.0 mi

Top 56%
×5stories
+64ft-50ft

Overall

14974

Males

9984

M55-59

9984

20M→21M

20.0 - 21.0 mi

Top 63%
×8stories
+106ft-24ft

Overall

16692

Males

10662

M55-59

10662

21M→35K

21.0 - 21.8 mi

Top 63%
×7stories
+17ft-86ft

Overall

16676

Males

10562

M55-59

10562

35K→23M

21.8 - 23.0 mi

Top 62%
×5stories
+23ft-63ft

Overall

16424

Males

10420

M55-59

10420

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

16906

Males

10583

M55-59

10583

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

18227

Males

11138

M55-59

11138

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

19165

Males

11537

M55-59

11537

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2stories
+22ft-21ft

Overall

16829

Males

10530

M55-59

10530

Passing Analysis

Category:
Athletes Passed
1600
Passed By
1666
Net Change
-66
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15987
5K → 10K212413-201#15987#16188
10K → 15K194190+4#16188#16184
15K → 20K28764+223#16184#15961
20K → Half3922+17#15961#15944
Half → 25K18685+101#15944#15843
25K → 30K223135+88#15843#15755
30K → 20M13333+100#15755#15655
20M → 21M72128-56#15655#15711
21M → 35K3670-34#15711#15745
35K → 23M7190-19#15745#15764
23M → 24M52128-76#15764#15840
24M → 40K36136-100#15840#15940
40K → 25.2M1388-75#15940#16015
25.2M → Finish4684-38#16015#16053
TOTALS16001666-66
📊

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