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BOSTON MARATHON 2023

Carlos Chiu

Bib: 21893•M

BC

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M65-69)
#0 / 549
Top 19%
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
8:33/mi
26:33
↑ 97↓ 3451.5%
10K· 6.21 mi
8:20/mi
52:27
↑ 79↓ 1380.4%
15K· 9.32 mi
8:22/mi
1:18:27
↑ 67↓ 78
20K· 12.43 mi
8:45/mi
1:45:39
↑ 106↓ 860.1%
Half· 13.11 mi
8:17/mi
1:51:18
↑ 19↓ 370.5%
25K· 15.53 mi
8:20/mi
2:11:30
↑ 66↓ 880.2%
30K· 18.64 mi
8:45/mi
2:38:41
↑ 181↓ 1480.2%
20M
8:49/mi
2:50:40
↑ 64↓ 500.2%
21M
9:26/mi
3:00:06
↑ 106↓ 241.6%
35K· 21.75 mi
8:15/mi
3:06:16
↑ 17↓ 861.7%
23M
8:46/mi
3:17:15
↑ 23↓ 630.6%
24M
8:23/mi
3:25:38
↓ 821.3%
40K· 24.85 mi
8:35/mi
3:32:58
↓ 200.3%
25.2M
9:14/mi
3:36:09
↑ 13↓ 160.2%
Finish· 26.22 mi
8:18/mi
3:44:36
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:18
Pace8:29 /mi
2nd Half
Distance13.11 mi
Time1:53:18
Pace8:39 /mi
📊Positive Split: 1.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:2626:338:3326:33
8:33
-
10K
6.21 mi11:45:2052:278:2625:54
8:20
-0:13
15K
9.32 mi12:11:201:18:278:2526:00
8:22
+0:02
20K
12.43 mi12:38:321:45:398:3027:12
8:45
+0:23
Half
13.11 mi12:44:111:51:188:295:39
8:17
-0:28
25K
15.53 mi13:04:232:11:308:2820:12
8:20
+0:03
30K
18.64 mi13:31:342:38:418:3127:11
8:45
+0:25
20M
20.00 mi13:43:332:50:408:3211:59
8:49
+0:04
21M
21.00 mi13:52:593:00:068:359:26
9:26
+0:37
35K
21.75 mi13:59:093:06:168:346:10
8:15
-1:11
23M
23.00 mi14:10:083:17:158:3510:59
8:46
+0:31
24M
24.00 mi14:18:313:25:388:348:23
8:23
-0:23
40K
24.85 mi14:25:513:32:588:347:20
8:35
+0:12
25.2M
25.20 mi14:29:023:36:098:353:11
9:14
+0:39
Finish
26.22 mi14:37:293:44:368:348:27
8:18
-0:56

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

8:15 /mi

Average Pace

8:34 /mi

Slowest Pace

9:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:31:59

94% of race

Time at Steady Pace

12:37

6% of race

Time at Slower Pace

0:00

0% 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 mi11:19:2626:338:3326:33
8:33
#17869
10K
6.21 mi11:45:2052:278:2625:54
8:20
#17471
15K
9.32 mi12:11:201:18:278:2526:00
8:22
#17303
20K
12.43 mi12:38:321:45:398:3027:12
8:45
#17568
Half
13.11 mi12:44:111:51:188:295:39
8:17
#17491
25K
15.53 mi13:04:232:11:308:2820:12
8:20
#17117
30K
18.64 mi13:31:342:38:418:3127:11
8:45
#16844
20M
20.00 mi13:43:332:50:408:3211:59
8:49
#16736
21M
21.00 mi13:52:593:00:068:359:26
9:26
#16672
35K
21.75 mi13:59:093:06:168:346:10
8:15
#16545
23M
23.00 mi14:10:083:17:158:3510:59
8:46
#16428
24M
24.00 mi14:18:313:25:388:348:23
8:23
#16293
40K
24.85 mi14:25:513:32:588:347:20
8:35
#16187
25.2M
25.20 mi14:29:023:36:098:353:11
9:14
#16152
Finish
26.22 mi14:37:293:44:368:348:27
8:18
#16075
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi17869113791137916956(Top 64%)11052(Top 73%)11052(Top 2013%)
10K6.21 mi3.10 mi17471+39811240+13911240+13917154(Top 64%)11168(Top 74%)11168(Top 2034%)
15K9.32 mi3.11 mi17303+16811184+5611184+5616956(Top 64%)11052(Top 73%)11052(Top 2013%)
20K12.43 mi3.11 mi17568-26511288-10411288-10418428(Top 69%)11655(Top 77%)11655(Top 2123%)
Half13.11 mi0.68 mi17491+7711251+3711251+3716322(Top 61%)10808(Top 71%)10808(Top 1969%)
25K15.53 mi2.42 mi17117+37411083+16811083+16815133(Top 57%)10186(Top 67%)10186(Top 1855%)
30K18.64 mi3.11 mi16844+27310956+12710956+12715770(Top 59%)10386(Top 68%)10386(Top 1892%)
20M20.00 mi1.36 mi16736+10810885+7110885+7115516(Top 58%)10215(Top 67%)10215(Top 1861%)
21M21.00 mi1.00 mi16672+6410848+3710848+3715631(Top 59%)10192(Top 67%)10192(Top 1856%)
35K21.75 mi0.75 mi16545+12710783+6510783+6513739(Top 52%)9312(Top 61%)9312(Top 1696%)
23M23.00 mi1.25 mi16428+11710719+6410719+6414822(Top 56%)9730(Top 64%)9730(Top 1772%)
24M24.00 mi1.00 mi16293+13510644+7510644+7513753(Top 52%)9212(Top 61%)9212(Top 1678%)
40K24.85 mi0.85 mi16187+10610580+6410580+6413809(Top 52%)9162(Top 60%)9162(Top 1669%)
25.2M25.20 mi0.35 mi16152+3510565+1510565+1513770(Top 52%)9138(Top 60%)9138(Top 1664%)
Finish26.22 mi1.02 mi16075+7710524+4110524+4114053(Top 53%)9272(Top 61%)9272(Top 1689%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

16956

Males

11052

M65-69

11052

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

17154

Males

11168

M65-69

11168

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

16956

Males

11052

M65-69

11052

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

18428

Males

11655

M65-69

11655

20K→Half

12.4 - 13.1 mi

Top 61%
×2story building
+19ft-37ft

Overall

16322

Males

10808

M65-69

10808

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

15133

Males

10186

M65-69

10186

25K→30K

15.5 - 18.6 mi

Top 59%
×9story building
+181ft-148ft

Overall

15770

Males

10386

M65-69

10386

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

15516

Males

10215

M65-69

10215

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

15631

Males

10192

M65-69

10192

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

13739

Males

9312

M65-69

9312

35K→23M

21.8 - 23.0 mi

Top 56%
×5story building
+23ft-63ft

Overall

14822

Males

9730

M65-69

9730

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

13753

Males

9212

M65-69

9212

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13809

Males

9162

M65-69

9162

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

13770

Males

9138

M65-69

9138

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2story building
+22ft-21ft

Overall

14053

Males

9272

M65-69

9272

Passing Analysis

Category:
Athletes Passed
2696
Passed By
902
Net Change
+1794
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17869
5K → 10K572174+398#17869#17471
10K → 15K286118+168#17471#17303
15K → 20K100365-265#17303#17568
20K → Half9013+77#17568#17491
Half → 25K3817+374#17491#17117
25K → 30K31845+273#17117#16844
30K → 20M13830+108#16844#16736
20M → 21M11450+64#16736#16672
21M → 35K1336+127#16672#16545
35K → 23M14326+117#16545#16428
23M → 24M14813+135#16428#16293
24M → 40K11913+106#16293#16187
40K → 25.2M449+35#16187#16152
25.2M → Finish11033+77#16152#16075
TOTALS2696902+1794
📊

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