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BOSTON MARATHON 2023

Chang Zuo

Bib: 12448•M

NC

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 31%
Gender (Male)
#0 / 15176
Top 45%
Masters (Masters Men)
#0 / 9891
Top 33%
Division (M45-49)
#0 / 2252
Top 45%
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
7:23/mi
22:55
↑ 97↓ 3451.5%
10K· 6.21 mi
7:13/mi
45:21
↑ 79↓ 1380.4%
15K· 9.32 mi
7:19/mi
1:08:05
↑ 67↓ 78
20K· 12.43 mi
7:20/mi
1:30:53
↑ 106↓ 860.1%
Half· 13.11 mi
7:17/mi
1:35:51
↑ 19↓ 370.5%
25K· 15.53 mi
7:23/mi
1:53:44
↑ 66↓ 880.2%
30K· 18.64 mi
7:38/mi
2:17:27
↑ 181↓ 1480.2%
20M
7:48/mi
2:28:03
↑ 64↓ 500.2%
21M
8:11/mi
2:36:14
↑ 106↓ 241.6%
35K· 21.75 mi
7:33/mi
2:41:53
↑ 17↓ 861.7%
23M
7:52/mi
2:51:44
↑ 23↓ 630.6%
24M
7:39/mi
2:59:23
↓ 821.3%
40K· 24.85 mi
7:51/mi
3:06:06
↓ 200.3%
25.2M
8:25/mi
3:09:00
↑ 13↓ 160.2%
Finish· 26.22 mi
7:46/mi
3:16:55
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:51
Pace7:19 /mi
2nd Half
Distance13.11 mi
Time1:41:04
Pace7:43 /mi
📊Positive Split: 5.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:4922:557:2322:55
7:23
-
10K
6.21 mi11:13:1545:217:1822:26
7:13
-0:10
15K
9.32 mi11:35:591:08:057:1822:44
7:19
+0:06
20K
12.43 mi11:58:471:30:537:1922:48
7:20
+0:01
Half
13.11 mi12:03:451:35:517:194:58
7:17
-0:03
25K
15.53 mi12:21:381:53:447:1917:53
7:23
+0:06
30K
18.64 mi12:45:212:17:277:2223:43
7:38
+0:15
20M
20.00 mi12:55:572:28:037:2410:36
7:48
+0:10
21M
21.00 mi13:04:082:36:147:268:11
8:11
+0:23
35K
21.75 mi13:09:472:41:537:275:39
7:33
-0:38
23M
23.00 mi13:19:382:51:447:289:51
7:52
+0:19
24M
24.00 mi13:27:172:59:237:287:39
7:39
-0:13
40K
24.85 mi13:34:003:06:067:296:43
7:51
+0:12
25.2M
25.20 mi13:36:543:09:007:302:54
8:25
+0:34
Finish
26.22 mi13:44:493:16:557:317:55
7:46
-0:39

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

7:13 /mi

Average Pace

7:31 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:05:50

94% of race

Time at Steady Pace

11:05

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:31 /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 mi10:50:4922:557:2322:55
7:23
#8631
10K
6.21 mi11:13:1545:217:1822:26
7:13
#8427
15K
9.32 mi11:35:591:08:057:1822:44
7:19
#8490
20K
12.43 mi11:58:471:30:537:1922:48
7:20
#8340
Half
13.11 mi12:03:451:35:517:194:58
7:17
#8347
25K
15.53 mi12:21:381:53:447:1917:53
7:23
#8229
30K
18.64 mi12:45:212:17:277:2223:43
7:38
#8180
20M
20.00 mi12:55:572:28:037:2410:36
7:48
#8194
21M
21.00 mi13:04:082:36:147:268:11
8:11
#8190
35K
21.75 mi13:09:472:41:537:275:39
7:33
#8197
23M
23.00 mi13:19:382:51:447:289:51
7:52
#8193
24M
24.00 mi13:27:172:59:237:287:39
7:39
#8194
40K
24.85 mi13:34:003:06:067:296:43
7:51
#8217
25.2M
25.20 mi13:36:543:09:007:302:54
8:25
#8216
Finish
26.22 mi13:44:493:16:557:317:55
7:46
#8269
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi8631737273728692(Top 33%)7362(Top 49%)7362(Top 327%)
10K6.21 mi3.10 mi8427+2047225+1477225+1478247(Top 31%)7115(Top 47%)7115(Top 316%)
15K9.32 mi3.11 mi8490-637263-387263-388692(Top 33%)7362(Top 49%)7362(Top 327%)
20K12.43 mi3.11 mi8340+1507159+1047159+1048070(Top 30%)6934(Top 46%)6934(Top 308%)
Half13.11 mi0.68 mi8347-77157+27157+28409(Top 32%)7148(Top 47%)7148(Top 317%)
25K15.53 mi2.42 mi8229+1187060+977060+977804(Top 29%)6674(Top 44%)6674(Top 296%)
30K18.64 mi3.11 mi8180+496986+746986+748179(Top 31%)6794(Top 45%)6794(Top 302%)
20M20.00 mi1.36 mi8194-146977+96977+98832(Top 33%)7091(Top 47%)7091(Top 315%)
21M21.00 mi1.00 mi8190+46956+216956+218505(Top 32%)6772(Top 45%)6772(Top 301%)
35K21.75 mi0.75 mi8197-76949+76949+78872(Top 33%)6996(Top 46%)6996(Top 311%)
23M23.00 mi1.25 mi8193+46926+236926+238835(Top 33%)6878(Top 45%)6878(Top 305%)
24M24.00 mi1.00 mi8194-16910+166910+168716(Top 33%)6734(Top 44%)6734(Top 299%)
40K24.85 mi0.85 mi8217-236900+106900+108991(Top 34%)6801(Top 45%)6801(Top 302%)
25.2M25.20 mi0.35 mi8216+16888+126888+128902(Top 33%)6675(Top 44%)6675(Top 296%)
Finish26.22 mi1.02 mi8269-536899-116899-1110408(Top 39%)7492(Top 49%)7492(Top 333%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

8692

Males

7362

M45-49

7362

5K→10K

3.1 - 6.2 mi

Top 31%
×5story building
+79ft-138ft

Overall

8247

Males

7115

M45-49

7115

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

8692

Males

7362

M45-49

7362

15K→20K

9.3 - 12.4 mi

Top 30%
×5story building
+106ft-86ft

Overall

8070

Males

6934

M45-49

6934

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

8409

Males

7148

M45-49

7148

Half→25K

13.1 - 15.5 mi

Top 29%
×4story building
+66ft-88ft

Overall

7804

Males

6674

M45-49

6674

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8179

Males

6794

M45-49

6794

30K→20M

18.6 - 20.0 mi

Top 33%
×5story building
+64ft-50ft

Overall

8832

Males

7091

M45-49

7091

20M→21M

20.0 - 21.0 mi

Top 32%
×8story building
+106ft-24ft

Overall

8505

Males

6772

M45-49

6772

21M→35K

21.0 - 21.8 mi

Top 33%
×7story building
+17ft-86ft

Overall

8872

Males

6996

M45-49

6996

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

8835

Males

6878

M45-49

6878

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8716

Males

6734

M45-49

6734

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

8991

Males

6801

M45-49

6801

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

8902

Males

6675

M45-49

6675

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2story building
+22ft-21ft

Overall

10408

Males

7492

M45-49

7492

Passing Analysis

Category:
Athletes Passed
1477
Passed By
1115
Net Change
+362
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8631
5K → 10K348144+204#8631#8427
10K → 15K120183-63#8427#8490
15K → 20K20454+150#8490#8340
20K → Half1522-7#8340#8347
Half → 25K17052+118#8347#8229
25K → 30K155106+49#8229#8180
30K → 20M7690-14#8180#8194
20M → 21M7672+4#8194#8190
21M → 35K3946-7#8190#8197
35K → 23M8682+4#8197#8193
23M → 24M6364-1#8193#8194
24M → 40K5881-23#8194#8217
40K → 25.2M2322+1#8217#8216
25.2M → Finish4497-53#8216#8269
TOTALS14771115+362
📊

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