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BOSTON MARATHON 2023

Xilan Xu

Bib: 31886 M CN

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

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
9:13/mi
28:39
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
9:18/mi
57:32
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:38/mi
1:27:28
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:55/mi
1:58:17
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
9:39/mi
2:04:52
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
10:14/mi
2:29:40
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
10:41/mi
3:02:50
↑ 181↓ 1480.2%
138 ft elev
20M
11:07/mi
3:17:57
↑ 64↓ 500.2%
148 ft elev
21M
12:16/mi
3:30:13
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
10:22/mi
3:37:58
↑ 17↓ 861.7%
156 ft elev
23M
12:00/mi
3:53:00
↑ 23↓ 630.6%
116 ft elev
24M
11:20/mi
4:04:20
↓ 821.3%
34 ft elev
40K· 24.85 mi
11:00/mi
4:13:44
↓ 200.3%
20 ft elev
25.2M
12:17/mi
4:17:58
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
11:09/mi
4:29:20
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
2:04:529:31 /mi⚡ faster
2nd Half
2:24:2811:01 /mi+15.7%
Positive split — 15.7% slower in the second half
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Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:4828:399:1328:39
9:13
-
10K
6.21 mi12:12:4157:329:1628:53
9:18
+0:05
15K
9.32 mi12:42:371:27:289:2329:56
9:38
+0:20
20K
12.43 mi13:13:261:58:179:3130:49
9:55
+0:17
Half
13.11 mi13:20:012:04:529:316:35
9:39
-0:16
25K
15.53 mi13:44:492:29:409:3824:48
10:14
+0:35
30K
18.64 mi14:17:593:02:509:4833:10
10:41
+0:27
20M
20.00 mi14:33:063:17:579:5415:07
11:07
+0:26
21M
21.00 mi14:45:223:30:1310:0112:16
12:16
+1:09
35K
21.75 mi14:53:073:37:5810:017:45
10:22
-1:54
23M
23.00 mi15:08:093:53:0010:0815:02
12:00
+1:38
24M
24.00 mi15:19:294:04:2010:1111:20
11:20
-0:40
40K
24.85 mi15:28:534:13:4410:139:24
11:00
-0:20
25.2M
25.20 mi15:33:074:17:5810:144:14
12:17
+1:17
Finish
26.22 mi15:44:294:29:2010:1711:22
11:09
-1:08

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

9:13 /mi

Average Pace

10:17 /mi

Slowest Pace

12:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:52

46% of race

Time at Steady Pace

1:41:36

38% of race

Time at Slower Pace

42:52

16% of race

Average Pace: 10:16 /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 mi11:43:4828:399:1328:39
9:13
#21274
10K
6.21 mi12:12:4157:329:1628:53
9:18
#21599
15K
9.32 mi12:42:371:27:289:2329:56
9:38
#21940
20K
12.43 mi13:13:261:58:179:3130:49
9:55
#22166
Half
13.11 mi13:20:012:04:529:316:35
9:39
#22185
25K
15.53 mi13:44:492:29:409:3824:48
10:14
#22305
30K
18.64 mi14:17:593:02:509:4833:10
10:41
#22351
20M
20.00 mi14:33:063:17:579:5415:07
11:07
#22394
21M
21.00 mi14:45:223:30:1310:0112:16
12:16
#22448
35K
21.75 mi14:53:073:37:5810:017:45
10:22
#22427
23M
23.00 mi15:08:093:53:0010:0815:02
12:00
#22547
24M
24.00 mi15:19:294:04:2010:1111:20
11:20
#22599
40K
24.85 mi15:28:534:13:4410:139:24
11:00
#22595
25.2M
25.20 mi15:33:074:17:5810:144:14
12:17
#22596
Finish
26.22 mi15:44:294:29:2010:1711:22
11:09
#22676
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi212741274212742226141345613456
10K6.21 mi3.10 mi21599-32512944-20212944-202219221312013120
15K9.32 mi3.11 mi21940-34113115-17113115-171226141345613456
20K12.43 mi3.11 mi22166-22613227-11213227-112227001348913489
Half13.11 mi0.68 mi22185-1913234-713234-7225091340713407
25K15.53 mi2.42 mi22305-12013278-4413278-44226791345013450
30K18.64 mi3.11 mi22351-4613291-1313291-13225521331713317
20M20.00 mi1.36 mi22394-4313304-1313304-13229041342113421
21M21.00 mi1.00 mi22448-5413312-813312-8231421350213502
35K21.75 mi0.75 mi22427+2113303+913303+9221181297812978
23M23.00 mi1.25 mi22547-12013342-3913342-39240041385313853
24M24.00 mi1.00 mi22599-5213358-1613358-16236361364613646
40K24.85 mi0.85 mi22595+413350+813350+8223331299812998
25.2M25.20 mi0.35 mi22596-113346+413346+4229231328113281
Finish26.22 mi1.02 mi22676-8013377-3113377-31242261394113941

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

22614

Males

13456

M55-59

13456

5K→10K

3.1 - 6.2 mi

Top 82%
×5story building
+79ft-138ft

Overall

21922

Males

13120

M55-59

13120

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

22614

Males

13456

M55-59

13456

15K→20K

9.3 - 12.4 mi

Top 85%
×5story building
+106ft-86ft

Overall

22700

Males

13489

M55-59

13489

20K→Half

12.4 - 13.1 mi

Top 85%
×2story building
+19ft-37ft

Overall

22509

Males

13407

M55-59

13407

Half→25K

13.1 - 15.5 mi

Top 85%
×4story building
+66ft-88ft

Overall

22679

Males

13450

M55-59

13450

25K→30K

15.5 - 18.6 mi

Top 85%
×9story building
+181ft-148ft

Overall

22552

Males

13317

M55-59

13317

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

22904

Males

13421

M55-59

13421

20M→21M

20.0 - 21.0 mi

Top 87%
×8story building
+106ft-24ft

Overall

23142

Males

13502

M55-59

13502

21M→35K

21.0 - 21.8 mi

Top 83%
×7story building
+17ft-86ft

Overall

22118

Males

12978

M55-59

12978

35K→23M

21.8 - 23.0 mi

Top 90%
×5story building
+23ft-63ft

Overall

24004

Males

13853

M55-59

13853

23M→24M

23.0 - 24.0 mi

Top 89%
×6story building
+12ft-82ft

Overall

23636

Males

13646

M55-59

13646

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

22333

Males

12998

M55-59

12998

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

22923

Males

13281

M55-59

13281

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2story building
+22ft-21ft

Overall

24226

Males

13941

M55-59

13941

Passing Analysis

Category:
Athletes Passed
679
Passed By
2081
Net Change
-1402
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21274
5K → 10K139464-325#21274#21599
10K → 15K61402-341#21599#21940
15K → 20K65291-226#21940#22166
20K → Half1938-19#22166#22185
Half → 25K59179-120#22185#22305
25K → 30K108154-46#22305#22351
30K → 20M4184-43#22351#22394
20M → 21M3791-54#22394#22448
21M → 35K4524+21#22448#22427
35K → 23M30150-120#22427#22547
23M → 24M1567-52#22547#22599
24M → 40K2824+4#22599#22595
40K → 25.2M1415-1#22595#22596
25.2M → Finish1898-80#22596#22676
TOTALS6792081-1402

Passing Charts

Category:
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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