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BOSTON MARATHON 2023

Chunjiang Fu

Bib: 29108•M

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:51/mi
27:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:16/mi
53:13
↑ 79↓ 1380.4%
15K· 9.32 mi
8:18/mi
1:19:01
↑ 67↓ 78
20K· 12.43 mi
8:20/mi
1:44:54
↑ 106↓ 860.1%
Half· 13.11 mi
8:11/mi
1:50:29
↑ 19↓ 370.5%
25K· 15.53 mi
8:40/mi
2:11:29
↑ 66↓ 880.2%
30K· 18.64 mi
9:59/mi
2:42:29
↑ 181↓ 1480.2%
20M
9:43/mi
2:55:41
↑ 64↓ 500.2%
21M
11:19/mi
3:07:00
↑ 106↓ 241.6%
35K· 21.75 mi
9:23/mi
3:14:01
↑ 17↓ 861.7%
23M
10:30/mi
3:27:10
↑ 23↓ 630.6%
24M
9:23/mi
3:36:33
↓ 821.3%
40K· 24.85 mi
10:05/mi
3:45:10
↓ 200.3%
25.2M
11:19/mi
3:49:04
↑ 13↓ 160.2%
Finish· 26.22 mi
9:48/mi
3:59:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:29
Pace8:26 /mi
2nd Half
Distance13.11 mi
Time2:08:34
Pace9:48 /mi
📊Positive Split: 16.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:4527:318:5127:31
8:51
-
10K
6.21 mi12:15:2753:138:3425:42
8:16
-0:35
15K
9.32 mi12:41:151:19:018:2925:48
8:18
+0:02
20K
12.43 mi13:07:081:44:548:2625:53
8:20
+0:02
Half
13.11 mi13:12:431:50:298:265:35
8:11
-0:09
25K
15.53 mi13:33:432:11:298:2821:00
8:40
+0:29
30K
18.64 mi14:04:432:42:298:4331:00
9:59
+1:19
20M
20.00 mi14:17:552:55:418:4713:12
9:43
-0:16
21M
21.00 mi14:29:143:07:008:5411:19
11:19
+1:36
35K
21.75 mi14:36:153:14:018:557:01
9:23
-1:56
23M
23.00 mi14:49:243:27:109:0013:09
10:30
+1:07
24M
24.00 mi14:58:473:36:339:019:23
9:23
-1:07
40K
24.85 mi15:07:243:45:109:048:37
10:05
+0:42
25.2M
25.20 mi15:11:183:49:049:053:54
11:19
+1:14
Finish
26.22 mi15:21:173:59:039:079:59
9:48
-1:31

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

8:11 /mi

Average Pace

9:07 /mi

Slowest Pace

11:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:29

55% of race

Time at Steady Pace

39:35

17% of race

Time at Slower Pace

1:07:59

28% of race

Average Pace: 9:07 /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 mi11:49:4527:318:5127:31
8:51
#19766
10K
6.21 mi12:15:2753:138:3425:42
8:16
#18283
15K
9.32 mi12:41:151:19:018:2925:48
8:18
#17703
20K
12.43 mi13:07:081:44:548:2625:53
8:20
#17201
Half
13.11 mi13:12:431:50:298:265:35
8:11
#17139
25K
15.53 mi13:33:432:11:298:2821:00
8:40
#17112
30K
18.64 mi14:04:432:42:298:4331:00
9:59
#18079
20M
20.00 mi14:17:552:55:418:4713:12
9:43
#18237
21M
21.00 mi14:29:143:07:008:5411:19
11:19
#18578
35K
21.75 mi14:36:153:14:018:557:01
9:23
#18603
23M
23.00 mi14:49:243:27:109:0013:09
10:30
#18872
24M
24.00 mi14:58:473:36:339:019:23
9:23
#18865
40K
24.85 mi15:07:243:45:109:048:37
10:05
#18956
25.2M
25.20 mi15:11:183:49:049:053:54
11:19
#19007
Finish
26.22 mi15:21:173:59:039:079:59
9:48
#19144
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi19766120691206916558(Top 62%)10906(Top 72%)10906(Top 484%)
10K6.21 mi3.10 mi18283+148311577+49211577+49216732(Top 63%)11007(Top 73%)11007(Top 489%)
15K9.32 mi3.11 mi17703+58011346+23111346+23116558(Top 62%)10906(Top 72%)10906(Top 484%)
20K12.43 mi3.11 mi17201+50211133+21311133+21315799(Top 59%)10559(Top 70%)10559(Top 469%)
Half13.11 mi0.68 mi17139+6211111+2211111+2215662(Top 59%)10570(Top 70%)10570(Top 469%)
25K15.53 mi2.42 mi17112+2711082+2911082+2917163(Top 64%)11049(Top 73%)11049(Top 491%)
30K18.64 mi3.11 mi18079-96711446-36411446-36420967(Top 79%)12616(Top 83%)12616(Top 560%)
20M20.00 mi1.36 mi18237-15811494-4811494-4819585(Top 74%)11937(Top 79%)11937(Top 530%)
21M21.00 mi1.00 mi18578-34111640-14611640-14621502(Top 81%)12739(Top 84%)12739(Top 566%)
35K21.75 mi0.75 mi18603-2511648-811648-819423(Top 73%)11782(Top 78%)11782(Top 523%)
23M23.00 mi1.25 mi18872-26911735-8711735-8721314(Top 80%)12599(Top 83%)12599(Top 559%)
24M24.00 mi1.00 mi18865+711721+1411721+1418771(Top 71%)11440(Top 75%)11440(Top 508%)
40K24.85 mi0.85 mi18956-9111762-4111762-4120173(Top 76%)12002(Top 79%)12002(Top 533%)
25.2M25.20 mi0.35 mi19007-5111781-1911781-1921114(Top 79%)12434(Top 82%)12434(Top 552%)
Finish26.22 mi1.02 mi19144-13711835-5411835-5421127(Top 79%)12481(Top 82%)12481(Top 554%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21story building
+97ft-345ft

Overall

16558

Males

10906

M45-49

10906

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

16732

Males

11007

M45-49

11007

10K→15K

6.2 - 9.3 mi

Top 62%
×3story building
+67ft-78ft

Overall

16558

Males

10906

M45-49

10906

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

15799

Males

10559

M45-49

10559

20K→Half

12.4 - 13.1 mi

Top 59%
×2story building
+19ft-37ft

Overall

15662

Males

10570

M45-49

10570

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

17163

Males

11049

M45-49

11049

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

20967

Males

12616

M45-49

12616

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

19585

Males

11937

M45-49

11937

20M→21M

20.0 - 21.0 mi

Top 81%
×8story building
+106ft-24ft

Overall

21502

Males

12739

M45-49

12739

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

19423

Males

11782

M45-49

11782

35K→23M

21.8 - 23.0 mi

Top 80%
×5story building
+23ft-63ft

Overall

21314

Males

12599

M45-49

12599

23M→24M

23.0 - 24.0 mi

Top 71%
×6story building
+12ft-82ft

Overall

18771

Males

11440

M45-49

11440

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

20173

Males

12002

M45-49

12002

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

21114

Males

12434

M45-49

12434

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2story building
+22ft-21ft

Overall

21127

Males

12481

M45-49

12481

Passing Analysis

Category:
Athletes Passed
3113
Passed By
2491
Net Change
+622
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19766
5K → 10K151532+1483#19766#18283
10K → 15K61131+580#18283#17703
15K → 20K52119+502#17703#17201
20K → Half653+62#17201#17139
Half → 25K137110+27#17139#17112
25K → 30K31998-967#17112#18079
30K → 20M43201-158#18079#18237
20M → 21M19360-341#18237#18578
21M → 35K3560-25#18578#18603
35K → 23M25294-269#18603#18872
23M → 24M6154+7#18872#18865
24M → 40K24115-91#18865#18956
40K → 25.2M1364-51#18956#19007
25.2M → Finish13150-137#19007#19144
TOTALS31132491+622
📊

Passing Visuals

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