Boston Marathon logo
BOSTON MARATHON 2023

Nicholas Chadwick

Bib: 1454•M

ON

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 4%
Gender (Male)
#0 / 15176
Top 6%
Division (M18-39)
#0 / 5285
Top 15%
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
6:05/mi
18:55
↑ 97↓ 3451.5%
10K· 6.21 mi
6:05/mi
37:49
↑ 79↓ 1380.4%
15K· 9.32 mi
6:09/mi
56:54
↑ 67↓ 78
20K· 12.43 mi
6:13/mi
1:16:12
↑ 106↓ 860.1%
Half· 13.11 mi
6:09/mi
1:20:24
↑ 19↓ 370.5%
25K· 15.53 mi
6:18/mi
1:35:41
↑ 66↓ 880.2%
30K· 18.64 mi
6:18/mi
1:55:14
↑ 181↓ 1480.2%
20M
6:19/mi
2:03:49
↑ 64↓ 500.2%
21M
6:39/mi
2:10:28
↑ 106↓ 241.6%
35K· 21.75 mi
6:08/mi
2:15:03
↑ 17↓ 861.7%
23M
6:26/mi
2:23:06
↑ 23↓ 630.6%
24M
6:22/mi
2:29:28
↓ 821.3%
40K· 24.85 mi
6:40/mi
2:35:10
↓ 200.3%
25.2M
7:03/mi
2:37:36
↑ 13↓ 160.2%
Finish· 26.22 mi
6:22/mi
2:44:05
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:20:24
Pace6:08 /mi
2nd Half
Distance13.11 mi
Time1:23:41
Pace6:23 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:1318:556:0518:55
6:05
-
10K
6.21 mi10:38:0737:496:0518:54
6:05
0:00
15K
9.32 mi10:57:1256:546:0619:05
6:09
+0:04
20K
12.43 mi11:16:301:16:126:0819:18
6:13
+0:04
Half
13.11 mi11:20:421:20:246:084:12
6:09
-0:04
25K
15.53 mi11:35:591:35:416:1015:17
6:18
+0:09
30K
18.64 mi11:55:321:55:146:1119:33
6:18
0:00
20M
20.00 mi12:04:072:03:496:118:35
6:19
+0:01
21M
21.00 mi12:10:462:10:286:136:39
6:39
+0:20
35K
21.75 mi12:15:212:15:036:134:35
6:08
-0:31
23M
23.00 mi12:23:242:23:066:138:03
6:26
+0:18
24M
24.00 mi12:29:462:29:286:146:22
6:22
-0:04
40K
24.85 mi12:35:282:35:106:155:42
6:40
+0:18
25.2M
25.20 mi12:37:542:37:366:152:26
7:03
+0:23
Finish
26.22 mi12:44:232:44:056:166:29
6:22
-0:41

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

6:05 /mi

Average Pace

6:16 /mi

Slowest Pace

7:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:41:39

99% of race

Time at Steady Pace

2:26

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:15 /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 mi10:19:1318:556:0518:55
6:05
#870
10K
6.21 mi10:38:0737:496:0518:54
6:05
#936
15K
9.32 mi10:57:1256:546:0619:05
6:09
#979
20K
12.43 mi11:16:301:16:126:0819:18
6:13
#994
Half
13.11 mi11:20:421:20:246:084:12
6:09
#998
25K
15.53 mi11:35:591:35:416:1015:17
6:18
#1016
30K
18.64 mi11:55:321:55:146:1119:33
6:18
#967
20M
20.00 mi12:04:072:03:496:118:35
6:19
#952
21M
21.00 mi12:10:462:10:286:136:39
6:39
#939
35K
21.75 mi12:15:212:15:036:134:35
6:08
#937
23M
23.00 mi12:23:242:23:066:138:03
6:26
#930
24M
24.00 mi12:29:462:29:286:146:22
6:22
#932
40K
24.85 mi12:35:282:35:106:155:42
6:40
#952
25.2M
25.20 mi12:37:542:37:366:152:26
7:03
#959
Finish
26.22 mi12:44:232:44:056:166:29
6:22
#974
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi8708178171076(Top 4%)1023(Top 7%)1023(Top 19%)
10K6.21 mi3.10 mi936-66884-67884-671014(Top 4%)964(Top 6%)964(Top 18%)
15K9.32 mi3.11 mi979-43927-43927-431076(Top 4%)1023(Top 7%)1023(Top 19%)
20K12.43 mi3.11 mi994-15943-16943-161075(Top 4%)1024(Top 7%)1024(Top 19%)
Half13.11 mi0.68 mi998-4948-5948-51173(Top 4%)1122(Top 7%)1122(Top 21%)
25K15.53 mi2.42 mi1016-18965-17965-171340(Top 5%)1280(Top 8%)1280(Top 24%)
30K18.64 mi3.11 mi967+49918+47918+47895(Top 3%)852(Top 6%)852(Top 16%)
20M20.00 mi1.36 mi952+15904+14904+14906(Top 3%)865(Top 6%)865(Top 16%)
21M21.00 mi1.00 mi939+13892+12892+12969(Top 4%)921(Top 6%)921(Top 17%)
35K21.75 mi0.75 mi937+2890+2890+21006(Top 4%)956(Top 6%)956(Top 18%)
23M23.00 mi1.25 mi930+7883+7883+71183(Top 4%)1117(Top 7%)1117(Top 21%)
24M24.00 mi1.00 mi932-2885-2885-21550(Top 6%)1466(Top 10%)1466(Top 28%)
40K24.85 mi0.85 mi952-20905-20905-202157(Top 8%)2008(Top 13%)2008(Top 38%)
25.2M25.20 mi0.35 mi959-7910-5910-51870(Top 7%)1753(Top 12%)1753(Top 33%)
Finish26.22 mi1.02 mi974-15926-16926-161845(Top 7%)1723(Top 11%)1723(Top 33%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21story building
+97ft-345ft

Overall

1076

Males

1023

M18-39

1023

5K→10K

3.1 - 6.2 mi

Top 4%
×5story building
+79ft-138ft

Overall

1014

Males

964

M18-39

964

10K→15K

6.2 - 9.3 mi

Top 4%
×3story building
+67ft-78ft

Overall

1076

Males

1023

M18-39

1023

15K→20K

9.3 - 12.4 mi

Top 4%
×5story building
+106ft-86ft

Overall

1075

Males

1024

M18-39

1024

20K→Half

12.4 - 13.1 mi

Top 4%
×2story building
+19ft-37ft

Overall

1173

Males

1122

M18-39

1122

Half→25K

13.1 - 15.5 mi

Top 5%
×4story building
+66ft-88ft

Overall

1340

Males

1280

M18-39

1280

25K→30K

15.5 - 18.6 mi

Top 3%
×9story building
+181ft-148ft

Overall

895

Males

852

M18-39

852

30K→20M

18.6 - 20.0 mi

Top 3%
×5story building
+64ft-50ft

Overall

906

Males

865

M18-39

865

20M→21M

20.0 - 21.0 mi

Top 4%
×8story building
+106ft-24ft

Overall

969

Males

921

M18-39

921

21M→35K

21.0 - 21.8 mi

Top 4%
×7story building
+17ft-86ft

Overall

1006

Males

956

M18-39

956

35K→23M

21.8 - 23.0 mi

Top 4%
×5story building
+23ft-63ft

Overall

1183

Males

1117

M18-39

1117

23M→24M

23.0 - 24.0 mi

Top 6%
×6story building
+12ft-82ft

Overall

1550

Males

1466

M18-39

1466

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2157

Males

2008

M18-39

2008

40K→25.2M

24.9 - 25.2 mi

Top 7%
×1story
+13ft-16ft

Overall

1870

Males

1753

M18-39

1753

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2story building
+22ft-21ft

Overall

1845

Males

1723

M18-39

1723

Passing Analysis

Category:
Athletes Passed
246
Passed By
350
Net Change
-104
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#870
5K → 10K2086-66#870#936
10K → 15K1558-43#936#979
15K → 20K2136-15#979#994
20K → Half26-4#994#998
Half → 25K1836-18#998#1016
25K → 30K6213+49#1016#967
30K → 20M2510+15#967#952
20M → 21M207+13#952#939
21M → 35K97+2#939#937
35K → 23M1710+7#937#930
23M → 24M1113-2#930#932
24M → 40K727-20#932#952
40K → 25.2M512-7#952#959
25.2M → Finish1429-15#959#974
TOTALS246350-104
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing