Boston Marathon logo
BOSTON MARATHON 2023

John Park

Bib: 10162•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 39%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 42%
Division (M50-54)
#0 / 2052
Top 43%
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
7:37/mi
23:40
↑ 97↓ 3451.5%
10K· 6.21 mi
7:36/mi
47:17
↑ 79↓ 1380.4%
15K· 9.32 mi
7:32/mi
1:10:42
↑ 67↓ 78
20K· 12.43 mi
7:37/mi
1:34:21
↑ 106↓ 860.1%
Half· 13.11 mi
7:33/mi
1:39:30
↑ 19↓ 370.5%
25K· 15.53 mi
7:42/mi
1:58:10
↑ 66↓ 880.2%
30K· 18.64 mi
8:00/mi
2:23:00
↑ 181↓ 1480.2%
20M
8:06/mi
2:34:00
↑ 64↓ 500.2%
21M
8:26/mi
2:42:26
↑ 106↓ 241.6%
35K· 21.75 mi
7:38/mi
2:48:09
↑ 17↓ 861.7%
23M
7:58/mi
2:58:07
↑ 23↓ 630.6%
24M
7:40/mi
3:05:47
↓ 821.3%
40K· 24.85 mi
8:03/mi
3:12:40
↓ 200.3%
25.2M
8:33/mi
3:15:37
↑ 13↓ 160.2%
Finish· 26.22 mi
7:53/mi
3:23:39
↑ 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
Time1:39:30
Pace7:35 /mi
2nd Half
Distance13.11 mi
Time1:44:09
Pace7:57 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:4923:407:3723:40
7:37
-
10K
6.21 mi11:13:2647:177:3723:37
7:36
-0:01
15K
9.32 mi11:36:511:10:427:3523:25
7:32
-0:04
20K
12.43 mi12:00:301:34:217:3623:39
7:37
+0:05
Half
13.11 mi12:05:391:39:307:355:09
7:33
-0:04
25K
15.53 mi12:24:191:58:107:3618:40
7:42
+0:09
30K
18.64 mi12:49:092:23:007:4024:50
8:00
+0:18
20M
20.00 mi13:00:092:34:007:4211:00
8:06
+0:06
21M
21.00 mi13:08:352:42:267:448:26
8:26
+0:20
35K
21.75 mi13:14:182:48:097:445:43
7:38
-0:48
23M
23.00 mi13:24:162:58:077:459:58
7:58
+0:20
24M
24.00 mi13:31:563:05:477:447:40
7:40
-0:18
40K
24.85 mi13:38:493:12:407:456:53
8:03
+0:23
25.2M
25.20 mi13:41:463:15:377:462:57
8:33
+0:30
Finish
26.22 mi13:49:483:23:397:468:02
7:53
-0:40

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

7:32 /mi

Average Pace

7:46 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:12:16

94% of race

Time at Steady Pace

11:23

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:46 /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 mi10:49:4923:407:3723:40
7:37
#10684
10K
6.21 mi11:13:2647:177:3723:37
7:36
#10986
15K
9.32 mi11:36:511:10:427:3523:25
7:32
#10797
20K
12.43 mi12:00:301:34:217:3623:39
7:37
#10635
Half
13.11 mi12:05:391:39:307:355:09
7:33
#10633
25K
15.53 mi12:24:191:58:107:3618:40
7:42
#10537
30K
18.64 mi12:49:092:23:007:4024:50
8:00
#10534
20M
20.00 mi13:00:092:34:007:4211:00
8:06
#10547
21M
21.00 mi13:08:352:42:267:448:26
8:26
#10493
35K
21.75 mi13:14:182:48:097:445:43
7:38
#10439
23M
23.00 mi13:24:162:58:077:459:58
7:58
#10348
24M
24.00 mi13:31:563:05:477:447:40
7:40
#10269
40K
24.85 mi13:38:493:12:407:456:53
8:03
#10237
25.2M
25.20 mi13:41:463:15:377:462:57
8:33
#10225
Finish
26.22 mi13:49:483:23:397:468:02
7:53
#10250
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi106848496849610467(Top 39%)8391(Top 55%)8391(Top 409%)
10K6.21 mi3.10 mi10986-3028653-1578653-15711335(Top 43%)8803(Top 58%)8803(Top 429%)
15K9.32 mi3.11 mi10797+1898551+1028551+10210467(Top 39%)8391(Top 55%)8391(Top 409%)
20K12.43 mi3.11 mi10635+1628474+778474+7710163(Top 38%)8161(Top 54%)8161(Top 398%)
Half13.11 mi0.68 mi10633+28475-18475-110557(Top 40%)8379(Top 55%)8379(Top 408%)
25K15.53 mi2.42 mi10537+968412+638412+6310273(Top 39%)8136(Top 54%)8136(Top 396%)
30K18.64 mi3.11 mi10534+38349+638349+6310829(Top 41%)8255(Top 54%)8255(Top 402%)
20M20.00 mi1.36 mi10547-138336+138336+1310959(Top 41%)8231(Top 54%)8231(Top 401%)
21M21.00 mi1.00 mi10493+548275+618275+6110055(Top 38%)7634(Top 50%)7634(Top 372%)
35K21.75 mi0.75 mi10439+548236+398236+399541(Top 36%)7378(Top 49%)7378(Top 360%)
23M23.00 mi1.25 mi10348+918161+758161+759469(Top 36%)7215(Top 48%)7215(Top 352%)
24M24.00 mi1.00 mi10269+798099+628099+628846(Top 33%)6815(Top 45%)6815(Top 332%)
40K24.85 mi0.85 mi10237+328056+438056+4310349(Top 39%)7516(Top 50%)7516(Top 366%)
25.2M25.20 mi0.35 mi10225+128036+208036+209822(Top 37%)7208(Top 47%)7208(Top 351%)
Finish26.22 mi1.02 mi10250-258014+228014+2211261(Top 42%)7918(Top 52%)7918(Top 386%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21story building
+97ft-345ft

Overall

10467

Males

8391

M50-54

8391

5K→10K

3.1 - 6.2 mi

Top 43%
×5story building
+79ft-138ft

Overall

11335

Males

8803

M50-54

8803

10K→15K

6.2 - 9.3 mi

Top 39%
×3story building
+67ft-78ft

Overall

10467

Males

8391

M50-54

8391

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10163

Males

8161

M50-54

8161

20K→Half

12.4 - 13.1 mi

Top 40%
×2story building
+19ft-37ft

Overall

10557

Males

8379

M50-54

8379

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

10273

Males

8136

M50-54

8136

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

10829

Males

8255

M50-54

8255

30K→20M

18.6 - 20.0 mi

Top 41%
×5story building
+64ft-50ft

Overall

10959

Males

8231

M50-54

8231

20M→21M

20.0 - 21.0 mi

Top 38%
×8story building
+106ft-24ft

Overall

10055

Males

7634

M50-54

7634

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9541

Males

7378

M50-54

7378

35K→23M

21.8 - 23.0 mi

Top 36%
×5story building
+23ft-63ft

Overall

9469

Males

7215

M50-54

7215

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8846

Males

6815

M50-54

6815

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

10349

Males

7516

M50-54

7516

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

9822

Males

7208

M50-54

7208

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

11261

Males

7918

M50-54

7918

Passing Analysis

Category:
Athletes Passed
1763*
Passed By
1329
Net Change
+434
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10684
5K → 10K174476-302#10684#10986
10K → 15K28697+189#10986#10797
15K → 20K24987+162#10797#10635
20K → Half3230+2#10635#10633
Half → 25K16771+96#10633#10537
25K → 30K178175+3#10537#10534
30K → 20M78*91-13#10534#10547
20M → 21M10854+54#10547#10493
21M → 35K7622+54#10493#10439
35K → 23M12433+91#10439#10348
23M → 24M10122+79#10348#10269
24M → 40K8856+32#10269#10237
40K → 25.2M42*30+12#10237#10225
25.2M → Finish6085-25#10225#10250
TOTALS1763*1329+434

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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