Boston Marathon logo
BOSTON MARATHON 2023

Bokun Kim

Bib: 32118•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 2%
Gender (Male)
#0 / 15176
Top 3%
Division (M18-39)
#0 / 5285
Top 8%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:21
Rank: #537
Start → 5K
5:54/mi
18:21 split
10K· 6.21 mi
36:14
Rank: #441 (+96)
5K → 10K
5:45/mi
17:53 split
15K· 9.32 mi
54:41
Rank: #478 (-37)
10K → 15K
5:56/mi
18:27 split
20K· 12.43 mi
1:15:42
Rank: #881 (-403)
15K → 20K
6:46/mi
21:01 split
Half· 13.11 mi
1:19:45
Rank: #862 (+19)
20K → Half
5:56/mi
4:03 split
25K· 15.53 mi
1:34:16
Rank: #771 (+91)
Half → 25K
5:59/mi
14:31 split
30K· 18.64 mi
1:53:12
Rank: #716 (+55)
25K → 30K
6:06/mi
18:56 split
20M
2:01:26
Rank: #682 (+34)
30K → 20M
6:04/mi
8:14 split
21M
2:07:49
Rank: #656 (+26)
20M → 21M
6:23/mi
6:23 split
35K· 21.75 mi
2:12:13
Rank: #648 (+8)
21M → 35K
5:53/mi
4:24 split
23M
2:19:49
Rank: #617 (+31)
35K → 23M
6:04/mi
7:36 split
24M
2:25:40
Rank: #609 (+8)
23M → 24M
5:51/mi
5:51 split
40K· 24.85 mi
2:30:44
Rank: #585 (+24)
24M → 40K
5:56/mi
5:04 split
25.2M
2:32:54
Rank: #572 (+13)
40K → 25.2M
6:17/mi
2:10 split
Finish· 26.22 mi
2:38:45
Rank: #551 (+21)
25.2M → Finish
5:44/mi
5:51 split

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
Time1:19:45
Pace6:05 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:19:00
Pace6:02 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:38:0518:215:5418:21
5:54
-
10K
6.21 mi11:55:5836:145:5017:53
5:45
-0:09
15K
9.32 mi12:14:2554:415:5218:27
5:56
+0:11
20K
12.43 mi12:35:261:15:426:0521:01
6:46
+0:50
Half
13.11 mi12:39:291:19:456:054:03
5:56
-0:50
25K
15.53 mi12:54:001:34:166:0414:31
5:59
+0:03
30K
18.64 mi13:12:561:53:126:0418:56
6:06
+0:07
20M
20.00 mi13:21:102:01:266:048:14
6:04
-0:02
21M
21.00 mi13:27:332:07:496:056:23
6:23
+0:19
35K
21.75 mi13:31:572:12:136:054:24
5:53
-0:30
23M
23.00 mi13:39:332:19:496:057:36
6:04
+0:11
24M
24.00 mi13:45:242:25:406:045:51
5:51
-0:13
40K
24.85 mi13:50:282:30:446:045:04
5:56
+0:05
25.2M
25.20 mi13:52:382:32:546:042:10
6:17
+0:21
Finish
26.22 mi13:58:292:38:456:045:51
5:44
-0:33

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

5:44 /mi

Average Pace

6:04 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:21

83% of race

Time at Steady Pace

6:23

4% of race

Time at Slower Pace

21:01

13% of race

Average Pace: 6:03 /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 mi11:38:0518:215:5418:21
5:54
#537
10K
6.21 mi11:55:5836:145:5017:53
5:45
#441
15K
9.32 mi12:14:2554:415:5218:27
5:56
#478
20K
12.43 mi12:35:261:15:426:0521:01
6:46
#881
Half
13.11 mi12:39:291:19:456:054:03
5:56
#862
25K
15.53 mi12:54:001:34:166:0414:31
5:59
#771
30K
18.64 mi13:12:561:53:126:0418:56
6:06
#716
20M
20.00 mi13:21:102:01:266:048:14
6:04
#682
21M
21.00 mi13:27:332:07:496:056:23
6:23
#656
35K
21.75 mi13:31:572:12:136:054:24
5:53
#648
23M
23.00 mi13:39:332:19:496:057:36
6:04
#617
24M
24.00 mi13:45:242:25:406:045:51
5:51
#609
40K
24.85 mi13:50:282:30:446:045:04
5:56
#585
25.2M
25.20 mi13:52:382:32:546:042:10
6:17
#572
Finish
26.22 mi13:58:292:38:456:045:51
5:44
#551
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi537495495583(Top 2%)540(Top 4%)540(Top 10%)
10K6.21 mi3.10 mi441+96406+89406+89384(Top 1%)349(Top 2%)349(Top 7%)
15K9.32 mi3.11 mi478-37442-36442-36583(Top 2%)540(Top 4%)540(Top 10%)
20K12.43 mi3.11 mi881-403833-391833-3914096(Top 15%)3840(Top 25%)3840(Top 73%)
Half13.11 mi0.68 mi862+19815+18815+18611(Top 2%)573(Top 4%)573(Top 11%)
25K15.53 mi2.42 mi771+91726+89726+89534(Top 2%)497(Top 3%)497(Top 9%)
30K18.64 mi3.11 mi716+55674+52674+52497(Top 2%)465(Top 3%)465(Top 9%)
20M20.00 mi1.36 mi682+34640+34640+34428(Top 2%)394(Top 3%)394(Top 7%)
21M21.00 mi1.00 mi656+26614+26614+26461(Top 2%)428(Top 3%)428(Top 8%)
35K21.75 mi0.75 mi648+8606+8606+8485(Top 2%)450(Top 3%)450(Top 9%)
23M23.00 mi1.25 mi617+31577+29577+29404(Top 2%)376(Top 2%)376(Top 7%)
24M24.00 mi1.00 mi609+8569+8569+8317(Top 1%)291(Top 2%)291(Top 6%)
40K24.85 mi0.85 mi585+24546+23546+23259(Top 1.0%)236(Top 2%)236(Top 4%)
25.2M25.20 mi0.35 mi572+13533+13533+13223(Top 0.8%)204(Top 1%)204(Top 4%)
Finish26.22 mi1.02 mi551+21513+20513+20289(Top 1%)271(Top 2%)271(Top 5%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

583

Males

540

M18-39

540

5K→10K

3.1 - 6.2 mi

Top 1%
×5stories
+79ft-138ft

Overall

384

Males

349

M18-39

349

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

583

Males

540

M18-39

540

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

4096

Males

3840

M18-39

3840

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

611

Males

573

M18-39

573

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

534

Males

497

M18-39

497

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

497

Males

465

M18-39

465

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

428

Males

394

M18-39

394

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

461

Males

428

M18-39

428

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

485

Males

450

M18-39

450

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

404

Males

376

M18-39

376

23M→24M

23.0 - 24.0 mi

Top 1%
×6stories
+12ft-82ft

Overall

317

Males

291

M18-39

291

24M→40K

24.0 - 24.9 mi

Top 1.0%
×1story
+6ft-20ft

Overall

259

Males

236

M18-39

236

40K→25.2M

24.9 - 25.2 mi

Top 0.8%
×1story
+13ft-16ft

Overall

223

Males

204

M18-39

204

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

289

Males

271

M18-39

271

Passing Analysis

Category:
Athletes Passed
448
Passed By
462
Net Change
-14
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#537
5K → 10K982+96#537#441
10K → 15K643-37#441#478
15K → 20K1404-403#478#881
20K → Half190+19#881#862
Half → 25K910+91#862#771
25K → 30K583+55#771#716
30K → 20M340+34#716#682
20M → 21M271+26#682#656
21M → 35K124+8#656#648
35K → 23M321+31#648#617
23M → 24M113+8#617#609
24M → 40K240+24#609#585
40K → 25.2M130+13#585#572
25.2M → Finish221+21#572#551
TOTALS448462-14
📊

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