Boston Marathon logo
BOSTON MARATHON 2023

Kwang-Jae Yi

Bib: 17089•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 46%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Top 16%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:52
Rank: #14034
Start → 5K
24:52 | 8:00/mi
10K· 6.21 mi
49:21
Rank: #13918 (+116)
5K → 10K
24:29 | 7:53/mi
15K· 9.32 mi
1:13:52
Rank: #13770 (+148)
10K → 15K
24:31 | 7:53/mi
20K· 12.43 mi
1:38:57
Rank: #13800 (-30)
15K → 20K
25:05 | 8:04/mi
Half· 13.11 mi
1:44:25
Rank: #13820 (-20)
20K → Half
5:28 | 8:01/mi
25K· 15.53 mi
2:03:53
Rank: #13672 (+148)
Half → 25K
19:28 | 8:02/mi
30K· 18.64 mi
2:29:38
Rank: #13488 (+184)
25K → 30K
25:45 | 8:17/mi
20M
2:40:51
Rank: #13360 (+128)
30K → 20M
11:13 | 8:15/mi
21M
2:49:28
Rank: #13199 (+161)
20M → 21M
8:37 | 8:37/mi
35K· 21.75 mi
2:55:12
Rank: #13058 (+141)
21M → 35K
5:44 | 7:40/mi
23M
3:04:56
Rank: #12756 (+302)
35K → 23M
9:44 | 7:46/mi
24M
3:12:38
Rank: #12581 (+175)
23M → 24M
7:42 | 7:42/mi
40K· 24.85 mi
3:19:19
Rank: #12439 (+142)
24M → 40K
6:41 | 7:49/mi
25.2M
3:22:13
Rank: #12368 (+71)
40K → 25.2M
2:54 | 8:25/mi
Finish· 26.22 mi
3:29:43
Rank: #12166 (+202)
25.2M → Finish
7:30 | 7:22/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 Half⚖️ Balanced
Distance13.11 mi
Time1:44:25
Pace7:58 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:45:18
Pace8:02 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2724:528:0024:52
8:00
-
10K
6.21 mi11:39:5649:217:5724:29
7:53
-0:07
15K
9.32 mi12:04:271:13:527:5624:31
7:53
0:00
20K
12.43 mi12:29:321:38:577:5825:05
8:04
+0:11
Half
13.11 mi12:35:001:44:257:585:28
8:01
-0:03
25K
15.53 mi12:54:282:03:537:5819:28
8:02
+0:01
30K
18.64 mi13:20:132:29:388:0225:45
8:17
+0:15
20M
20.00 mi13:31:262:40:518:0311:13
8:15
-0:02
21M
21.00 mi13:40:032:49:288:048:37
8:37
+0:22
35K
21.75 mi13:45:472:55:128:035:44
7:40
-0:57
23M
23.00 mi13:55:313:04:568:029:44
7:46
+0:06
24M
24.00 mi14:03:133:12:388:027:42
7:42
-0:04
40K
24.85 mi14:09:543:19:198:016:41
7:49
+0:07
25.2M
25.20 mi14:12:483:22:138:012:54
8:25
+0:36
Finish
26.22 mi14:20:183:29:438:007:30
7:22
-1:03

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

7:22 /mi

Average Pace

8:00 /mi

Slowest Pace

8:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:41:14

77% of race

Time at Steady Pace

48:29

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:00 /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 mi11:15:2724:528:0024:52
8:00
#14034
10K
6.21 mi11:39:5649:217:5724:29
7:53
#13918
15K
9.32 mi12:04:271:13:527:5624:31
7:53
#13770
20K
12.43 mi12:29:321:38:577:5825:05
8:04
#13800
Half
13.11 mi12:35:001:44:257:585:28
8:01
#13820
25K
15.53 mi12:54:282:03:537:5819:28
8:02
#13672
30K
18.64 mi13:20:132:29:388:0225:45
8:17
#13488
20M
20.00 mi13:31:262:40:518:0311:13
8:15
#13360
21M
21.00 mi13:40:032:49:288:048:37
8:37
#13199
35K
21.75 mi13:45:472:55:128:035:44
7:40
#13058
23M
23.00 mi13:55:313:04:568:029:44
7:46
#12756
24M
24.00 mi14:03:133:12:388:027:42
7:42
#12581
40K
24.85 mi14:09:543:19:198:016:41
7:49
#12439
25.2M
25.20 mi14:12:483:22:138:012:54
8:25
#12368
Finish
26.22 mi14:20:183:29:438:007:30
7:22
#12166
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi140349959995913431(Top 50%)9668(Top 64%)9668(Top 871%)
10K6.21 mi3.10 mi13918+1169907+529907+5213798(Top 52%)9856(Top 65%)9856(Top 888%)
15K9.32 mi3.11 mi13770+1489827+809827+8013431(Top 50%)9668(Top 64%)9668(Top 871%)
20K12.43 mi3.11 mi13800-309820+79820+714026(Top 53%)9881(Top 65%)9881(Top 890%)
Half13.11 mi0.68 mi13820-209827-79827-714404(Top 54%)10043(Top 66%)10043(Top 905%)
25K15.53 mi2.42 mi13672+1489741+869741+8612962(Top 49%)9333(Top 61%)9333(Top 841%)
30K18.64 mi3.11 mi13488+1849637+1049637+10412943(Top 49%)9204(Top 61%)9204(Top 829%)
20M20.00 mi1.36 mi13360+1289569+689569+6812029(Top 45%)8719(Top 57%)8719(Top 785%)
21M21.00 mi1.00 mi13199+1619493+769493+7611142(Top 42%)8191(Top 54%)8191(Top 738%)
35K21.75 mi0.75 mi13058+1419410+839410+839709(Top 36%)7481(Top 49%)7481(Top 674%)
23M23.00 mi1.25 mi12756+3029254+1569254+1568239(Top 31%)6557(Top 43%)6557(Top 591%)
24M24.00 mi1.00 mi12581+1759165+899165+899085(Top 34%)6941(Top 46%)6941(Top 625%)
40K24.85 mi0.85 mi12439+1429087+789087+788787(Top 33%)6711(Top 44%)6711(Top 605%)
25.2M25.20 mi0.35 mi12368+719044+439044+438969(Top 34%)6742(Top 44%)6742(Top 607%)
Finish26.22 mi1.02 mi12166+2028934+1108934+1107511(Top 28%)5878(Top 39%)5878(Top 530%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

13431

Males

9668

M60-64

9668

5K→10K

3.1 - 6.2 mi

Top 52%
×5stories
+79ft-138ft

Overall

13798

Males

9856

M60-64

9856

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

13431

Males

9668

M60-64

9668

15K→20K

9.3 - 12.4 mi

Top 53%
×5stories
+106ft-86ft

Overall

14026

Males

9881

M60-64

9881

20K→Half

12.4 - 13.1 mi

Top 54%
×2stories
+19ft-37ft

Overall

14404

Males

10043

M60-64

10043

Half→25K

13.1 - 15.5 mi

Top 49%
×4stories
+66ft-88ft

Overall

12962

Males

9333

M60-64

9333

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

12943

Males

9204

M60-64

9204

30K→20M

18.6 - 20.0 mi

Top 45%
×5stories
+64ft-50ft

Overall

12029

Males

8719

M60-64

8719

20M→21M

20.0 - 21.0 mi

Top 42%
×8stories
+106ft-24ft

Overall

11142

Males

8191

M60-64

8191

21M→35K

21.0 - 21.8 mi

Top 36%
×7stories
+17ft-86ft

Overall

9709

Males

7481

M60-64

7481

35K→23M

21.8 - 23.0 mi

Top 31%
×5stories
+23ft-63ft

Overall

8239

Males

6557

M60-64

6557

23M→24M

23.0 - 24.0 mi

Top 34%
×6stories
+12ft-82ft

Overall

9085

Males

6941

M60-64

6941

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8787

Males

6711

M60-64

6711

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

8969

Males

6742

M60-64

6742

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2stories
+22ft-21ft

Overall

7511

Males

5878

M60-64

5878

Passing Analysis

Category:
Athletes Passed
2703
Passed By
835
Net Change
+1868
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14034
5K → 10K356240+116#14034#13918
10K → 15K265117+148#13918#13770
15K → 20K162192-30#13770#13800
20K → Half2444-20#13800#13820
Half → 25K20860+148#13820#13672
25K → 30K284100+184#13672#13488
30K → 20M15123+128#13488#13360
20M → 21M17817+161#13360#13199
21M → 35K1509+141#13199#13058
35K → 23M3042+302#13058#12756
23M → 24M18510+175#12756#12581
24M → 40K1453+142#12581#12439
40K → 25.2M776+71#12439#12368
25.2M → Finish21412+202#12368#12166
TOTALS2703835+1868
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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