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BOSTON MARATHON 2023

Nolan Chao

Bib: 3941•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 9%
Gender (Male)
#0 / 15176
Top 15%
Division (M18-39)
#0 / 5285
Top 33%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
20:52
Rank: #3795
Start → 5K
20:52 | 6:43/mi
10K· 6.21 mi
41:07
Rank: #3281 (+514)
5K → 10K
20:15 | 6:31/mi
15K· 9.32 mi
1:01:15
Rank: #2979 (+302)
10K → 15K
20:08 | 6:29/mi
20K· 12.43 mi
1:21:27
Rank: #2763 (+216)
15K → 20K
20:12 | 6:30/mi
Half· 13.11 mi
1:25:53
Rank: #2758 (+5)
20K → Half
4:26 | 6:30/mi
25K· 15.53 mi
1:41:44
Rank: #2673 (+85)
Half → 25K
15:51 | 6:32/mi
30K· 18.64 mi
2:02:32
Rank: #2596 (+77)
25K → 30K
20:48 | 6:42/mi
20M
2:11:34
Rank: #2532 (+64)
30K → 20M
9:02 | 6:39/mi
21M
2:18:37
Rank: #2493 (+39)
20M → 21M
7:03 | 7:03/mi
35K· 21.75 mi
2:23:24
Rank: #2448 (+45)
21M → 35K
4:47 | 6:24/mi
23M
2:31:44
Rank: #2390 (+58)
35K → 23M
8:20 | 6:39/mi
24M
2:38:21
Rank: #2376 (+14)
23M → 24M
6:37 | 6:37/mi
40K· 24.85 mi
2:44:02
Rank: #2341 (+35)
24M → 40K
5:41 | 6:39/mi
25.2M
2:46:32
Rank: #2332 (+9)
40K → 25.2M
2:30 | 7:15/mi
Finish· 26.22 mi
2:53:12
Rank: #2314 (+18)
25.2M → Finish
6:40 | 6:33/mi

Course Map & Elevation

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:53
Pace6:33 /mi
2nd Half
Distance13.11 mi
Time1:27:19
Pace6:40 /mi
📊Positive Split: 1.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:3220:526:4320:52
6:43
-
10K
6.21 mi10:42:4741:076:3720:15
6:31
-0:12
15K
9.32 mi11:02:551:01:156:3420:08
6:29
-0:02
20K
12.43 mi11:23:071:21:276:3320:12
6:30
+0:01
Half
13.11 mi11:27:331:25:536:334:26
6:30
0:00
25K
15.53 mi11:43:241:41:446:3315:51
6:32
+0:02
30K
18.64 mi12:04:122:02:326:3420:48
6:42
+0:10
20M
20.00 mi12:13:142:11:346:359:02
6:39
-0:03
21M
21.00 mi12:20:172:18:376:367:03
7:03
+0:24
35K
21.75 mi12:25:042:23:246:364:47
6:24
-0:39
23M
23.00 mi12:33:242:31:446:368:20
6:39
+0:15
24M
24.00 mi12:40:012:38:216:366:37
6:37
-0:02
40K
24.85 mi12:45:422:44:026:365:41
6:39
+0:02
25.2M
25.20 mi12:48:122:46:326:372:30
7:15
+0:36
Finish
26.22 mi12:54:522:53:126:376:40
6:33
-0:42

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

6:24 /mi

Average Pace

6:37 /mi

Slowest Pace

7:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:43:39

94% of race

Time at Steady Pace

9:33

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:36 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:22:3220:526:4320:52
6:43
#3795
10K
6.21 mi10:42:4741:076:3720:15
6:31
#3281
15K
9.32 mi11:02:551:01:156:3420:08
6:29
#2979
20K
12.43 mi11:23:071:21:276:3320:12
6:30
#2763
Half
13.11 mi11:27:331:25:536:334:26
6:30
#2758
25K
15.53 mi11:43:241:41:446:3315:51
6:32
#2673
30K
18.64 mi12:04:122:02:326:3420:48
6:42
#2596
20M
20.00 mi12:13:142:11:346:359:02
6:39
#2532
21M
21.00 mi12:20:172:18:376:367:03
7:03
#2493
35K
21.75 mi12:25:042:23:246:364:47
6:24
#2448
23M
23.00 mi12:33:242:31:446:368:20
6:39
#2390
24M
24.00 mi12:40:012:38:216:366:37
6:37
#2376
40K
24.85 mi12:45:422:44:026:365:41
6:39
#2341
25.2M
25.20 mi12:48:122:46:326:372:30
7:15
#2332
Finish
26.22 mi12:54:522:53:126:376:40
6:33
#2314
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3795356635662524(Top 9%)2420(Top 16%)2420(Top 46%)
10K6.21 mi3.10 mi3281+5143110+4563110+4562901(Top 11%)2771(Top 18%)2771(Top 52%)
15K9.32 mi3.11 mi2979+3022841+2692841+2692524(Top 9%)2420(Top 16%)2420(Top 46%)
20K12.43 mi3.11 mi2763+2162641+2002641+2002291(Top 9%)2196(Top 14%)2196(Top 42%)
Half13.11 mi0.68 mi2758+52637+42637+42736(Top 10%)2620(Top 17%)2620(Top 50%)
25K15.53 mi2.42 mi2673+852554+832554+832367(Top 9%)2267(Top 15%)2267(Top 43%)
30K18.64 mi3.11 mi2596+772480+742480+742373(Top 9%)2259(Top 15%)2259(Top 43%)
20M20.00 mi1.36 mi2532+642421+592421+592064(Top 8%)1968(Top 13%)1968(Top 37%)
21M21.00 mi1.00 mi2493+392387+342387+342372(Top 9%)2241(Top 15%)2241(Top 42%)
35K21.75 mi0.75 mi2448+452344+432344+431958(Top 7%)1862(Top 12%)1862(Top 35%)
23M23.00 mi1.25 mi2390+582287+572287+571986(Top 7%)1881(Top 12%)1881(Top 36%)
24M24.00 mi1.00 mi2376+142275+122275+122632(Top 10%)2450(Top 16%)2450(Top 46%)
40K24.85 mi0.85 mi2341+352239+362239+362092(Top 8%)1956(Top 13%)1956(Top 37%)
25.2M25.20 mi0.35 mi2332+92232+72232+72673(Top 10%)2459(Top 16%)2459(Top 47%)
Finish26.22 mi1.02 mi2314+182216+162216+162676(Top 10%)2448(Top 16%)2448(Top 46%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21stories
+97ft-345ft

Overall

2524

Males

2420

M18-39

2420

5K→10K

3.1 - 6.2 mi

Top 11%
×5stories
+79ft-138ft

Overall

2901

Males

2771

M18-39

2771

10K→15K

6.2 - 9.3 mi

Top 9%
×3stories
+67ft-78ft

Overall

2524

Males

2420

M18-39

2420

15K→20K

9.3 - 12.4 mi

Top 9%
×5stories
+106ft-86ft

Overall

2291

Males

2196

M18-39

2196

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2736

Males

2620

M18-39

2620

Half→25K

13.1 - 15.5 mi

Top 9%
×4stories
+66ft-88ft

Overall

2367

Males

2267

M18-39

2267

25K→30K

15.5 - 18.6 mi

Top 9%
×9stories
+181ft-148ft

Overall

2373

Males

2259

M18-39

2259

30K→20M

18.6 - 20.0 mi

Top 8%
×5stories
+64ft-50ft

Overall

2064

Males

1968

M18-39

1968

20M→21M

20.0 - 21.0 mi

Top 9%
×8stories
+106ft-24ft

Overall

2372

Males

2241

M18-39

2241

21M→35K

21.0 - 21.8 mi

Top 7%
×7stories
+17ft-86ft

Overall

1958

Males

1862

M18-39

1862

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

1986

Males

1881

M18-39

1881

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2632

Males

2450

M18-39

2450

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2092

Males

1956

M18-39

1956

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2673

Males

2459

M18-39

2459

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2stories
+22ft-21ft

Overall

2676

Males

2448

M18-39

2448

Passing Analysis

Category:
Athletes Passed
1693
Passed By
212
Net Change
+1481
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3795
5K → 10K54733+514#3795#3281
10K → 15K31513+302#3281#2979
15K → 20K2237+216#2979#2763
20K → Half1914+5#2763#2758
Half → 25K9712+85#2758#2673
25K → 30K11336+77#2673#2596
30K → 20M7612+64#2596#2532
20M → 21M5920+39#2532#2493
21M → 35K505+45#2493#2448
35K → 23M679+58#2448#2390
23M → 24M3016+14#2390#2376
24M → 40K449+35#2376#2341
40K → 25.2M134+9#2341#2332
25.2M → Finish4022+18#2332#2314
TOTALS1693212+1481
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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