Boston Marathon logo
BOSTON MARATHON 2023

Chankyo Park

Bib: 18005•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
Top 44%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:20
Rank: #15095
Start → 5K
25:20 | 8:09/mi
10K· 6.21 mi
49:21
Rank: #13921 (+1174)
5K → 10K
24:01 | 7:44/mi
15K· 9.32 mi
1:13:27
Rank: #13405 (+516)
10K → 15K
24:06 | 7:45/mi
20K· 12.43 mi
1:38:05
Rank: #13249 (+156)
15K → 20K
24:38 | 7:56/mi
Half· 13.11 mi
1:43:23
Rank: #13196 (+53)
20K → Half
5:18 | 7:46/mi
25K· 15.53 mi
2:02:53
Rank: #13139 (+57)
Half → 25K
19:30 | 8:03/mi
30K· 18.64 mi
2:28:44
Rank: #13130 (+9)
25K → 30K
25:51 | 8:19/mi
20M
2:40:19
Rank: #13172 (-42)
30K → 20M
11:35 | 8:31/mi
21M
2:49:28
Rank: #13201 (-29)
20M → 21M
9:09 | 9:09/mi
35K· 21.75 mi
2:55:37
Rank: #13210 (-9)
21M → 35K
6:09 | 8:13/mi
23M
3:06:22
Rank: #13213 (-3)
35K → 23M
10:45 | 8:35/mi
24M
3:14:47
Rank: #13241 (-28)
23M → 24M
8:25 | 8:25/mi
40K· 24.85 mi
3:22:09
Rank: #13247 (-6)
24M → 40K
7:22 | 8:37/mi
25.2M
3:25:23
Rank: #13245 (+2)
40K → 25.2M
3:14 | 9:23/mi
Finish· 26.22 mi
3:33:57
Rank: #13321 (-76)
25.2M → Finish
8:34 | 8:24/mi

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
Time1:43:23
Pace7:53 /mi
2nd Half
Distance13.11 mi
Time1:50:34
Pace8:26 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:1825:208:0925:20
8:09
-
10K
6.21 mi11:40:1949:217:5724:01
7:44
-0:25
15K
9.32 mi12:04:251:13:277:5324:06
7:45
+0:01
20K
12.43 mi12:29:031:38:057:5424:38
7:56
+0:11
Half
13.11 mi12:34:211:43:237:535:18
7:46
-0:10
25K
15.53 mi12:53:512:02:537:5519:30
8:03
+0:17
30K
18.64 mi13:19:422:28:447:5925:51
8:19
+0:16
20M
20.00 mi13:31:172:40:198:0111:35
8:31
+0:12
21M
21.00 mi13:40:262:49:288:049:09
9:09
+0:38
35K
21.75 mi13:46:352:55:378:056:09
8:13
-0:56
23M
23.00 mi13:57:203:06:228:0610:45
8:35
+0:22
24M
24.00 mi14:05:453:14:478:078:25
8:25
-0:10
40K
24.85 mi14:13:073:22:098:087:22
8:37
+0:12
25.2M
25.20 mi14:16:213:25:238:093:14
9:23
+0:46
Finish
26.22 mi14:24:553:33:578:108:34
8:24
-0:59

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

7:44 /mi

Average Pace

8:10 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:37:33

46% of race

Time at Steady Pace

1:25:54

40% of race

Time at Slower Pace

30:30

14% of race

Average Pace: 8:10 /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 mi11:16:1825:208:0925:20
8:09
#15095
10K
6.21 mi11:40:1949:217:5724:01
7:44
#13921
15K
9.32 mi12:04:251:13:277:5324:06
7:45
#13405
20K
12.43 mi12:29:031:38:057:5424:38
7:56
#13249
Half
13.11 mi12:34:211:43:237:535:18
7:46
#13196
25K
15.53 mi12:53:512:02:537:5519:30
8:03
#13139
30K
18.64 mi13:19:422:28:447:5925:51
8:19
#13130
20M
20.00 mi13:31:172:40:198:0111:35
8:31
#13172
21M
21.00 mi13:40:262:49:288:049:09
9:09
#13201
35K
21.75 mi13:46:352:55:378:056:09
8:13
#13210
23M
23.00 mi13:57:203:06:228:0610:45
8:35
#13213
24M
24.00 mi14:05:453:14:478:078:25
8:25
#13241
40K
24.85 mi14:13:073:22:098:087:22
8:37
#13247
25.2M
25.20 mi14:16:213:25:238:093:14
9:23
#13245
Finish
26.22 mi14:24:553:33:578:108:34
8:24
#13321
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi15095103641036412356(Top 46%)9230(Top 61%)9230(Top 649%)
10K6.21 mi3.10 mi13921+11749910+4549910+45412504(Top 47%)9337(Top 62%)9337(Top 657%)
15K9.32 mi3.11 mi13405+5169694+2169694+21612356(Top 46%)9230(Top 61%)9230(Top 649%)
20K12.43 mi3.11 mi13249+1569600+949600+9412854(Top 48%)9369(Top 62%)9369(Top 659%)
Half13.11 mi0.68 mi13196+539575+259575+2512408(Top 47%)9244(Top 61%)9244(Top 650%)
25K15.53 mi2.42 mi13139+579548+279548+2713077(Top 49%)9389(Top 62%)9389(Top 660%)
30K18.64 mi3.11 mi13130+99485+639485+6313135(Top 49%)9287(Top 61%)9287(Top 653%)
20M20.00 mi1.36 mi13172-429489-49489-413757(Top 52%)9464(Top 62%)9464(Top 666%)
21M21.00 mi1.00 mi13201-299495-69495-614184(Top 53%)9580(Top 63%)9580(Top 674%)
35K21.75 mi0.75 mi13210-99474+219474+2113549(Top 51%)9209(Top 61%)9209(Top 648%)
23M23.00 mi1.25 mi13213-39456+189456+1813710(Top 51%)9238(Top 61%)9238(Top 650%)
24M24.00 mi1.00 mi13241-289438+189438+1813948(Top 52%)9284(Top 61%)9284(Top 653%)
40K24.85 mi0.85 mi13247-69424+149424+1414027(Top 53%)9249(Top 61%)9249(Top 650%)
25.2M25.20 mi0.35 mi13245+29405+199405+1914503(Top 54%)9459(Top 62%)9459(Top 665%)
Finish26.22 mi1.02 mi13321-769417-129417-1214755(Top 55%)9606(Top 63%)9606(Top 676%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 46%
×21stories
+97ft-345ft

Overall

12356

Males

9230

M55-59

9230

5K→10K

3.1 - 6.2 mi

Top 47%
×5stories
+79ft-138ft

Overall

12504

Males

9337

M55-59

9337

10K→15K

6.2 - 9.3 mi

Top 46%
×3stories
+67ft-78ft

Overall

12356

Males

9230

M55-59

9230

15K→20K

9.3 - 12.4 mi

Top 48%
×5stories
+106ft-86ft

Overall

12854

Males

9369

M55-59

9369

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

12408

Males

9244

M55-59

9244

Half→25K

13.1 - 15.5 mi

Top 49%
×4stories
+66ft-88ft

Overall

13077

Males

9389

M55-59

9389

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

13135

Males

9287

M55-59

9287

30K→20M

18.6 - 20.0 mi

Top 52%
×5stories
+64ft-50ft

Overall

13757

Males

9464

M55-59

9464

20M→21M

20.0 - 21.0 mi

Top 53%
×8stories
+106ft-24ft

Overall

14184

Males

9580

M55-59

9580

21M→35K

21.0 - 21.8 mi

Top 51%
×7stories
+17ft-86ft

Overall

13549

Males

9209

M55-59

9209

35K→23M

21.8 - 23.0 mi

Top 51%
×5stories
+23ft-63ft

Overall

13710

Males

9238

M55-59

9238

23M→24M

23.0 - 24.0 mi

Top 52%
×6stories
+12ft-82ft

Overall

13948

Males

9284

M55-59

9284

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14027

Males

9249

M55-59

9249

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14503

Males

9459

M55-59

9459

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2stories
+22ft-21ft

Overall

14755

Males

9606

M55-59

9606

Passing Analysis

Category:
Athletes Passed
2951
Passed By
1177
Net Change
+1774
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15095
5K → 10K122248+1174#15095#13921
10K → 15K55337+516#13921#13405
15K → 20K265109+156#13405#13249
20K → Half607+53#13249#13196
Half → 25K165108+57#13196#13139
25K → 30K198189+9#13139#13130
30K → 20M75117-42#13130#13172
20M → 21M78107-29#13172#13201
21M → 35K5867-9#13201#13210
35K → 23M9295-3#13210#13213
23M → 24M5886-28#13213#13241
24M → 40K6167-6#13241#13247
40K → 25.2M3533+2#13247#13245
25.2M → Finish31107-76#13245#13321
TOTALS29511177+1774
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing