All Results|Race Analytics|Course|Contact
BOSTON MARATHON 2026

Choongsung Lim

Bib: 12524β€’M

Boston Marathon logo
0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 29021
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Age Group (M50-54)
#0 / 1868
Race Day Weather
51Β°/41Β°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
20:54
3.11 mi
Rank: #6166
Start β†’ 5K
20:54 | 6:44/mi
10K
42:41
6.21 mi
Rank: #7559 (-1393)
5K β†’ 10K
21:47 | 7:01/mi
15K
1:04:44
9.32 mi
Rank: #8171 (-612)
10K β†’ 15K
22:03 | 7:06/mi
20K
1:27:41
12.43 mi
Rank: #8770 (-599)
15K β†’ 20K
22:57 | 7:24/mi
HALF
1:32:56
13.11 mi
Rank: #9032 (-262)
20K β†’ HALF
5:15 | 7:43/mi
25K
1:51:37
15.53 mi
Rank: #9580 (-548)
HALF β†’ 25K
18:41 | 7:43/mi
30K
2:18:24
18.64 mi
Rank: #11242 (-1662)
25K β†’ 30K
26:47 | 8:38/mi
20M
2:32:38
20.00 mi
Rank: #12732 (-1490)
30K β†’ 20M
14:14 | 10:29/mi
21M
2:43:15
21.00 mi
Rank: #13530 (-798)
20M β†’ 21M
10:37 | 10:37/mi
35K
2:49:34
21.75 mi
Rank: #13677 (-147)
21M β†’ 35K
6:19 | 8:27/mi
23M
3:00:31
23.00 mi
Rank: #13913 (-236)
35K β†’ 23M
10:57 | 8:45/mi
24M
3:08:56
24.00 mi
Rank: #14023 (-110)
23M β†’ 24M
8:25 | 8:25/mi
40K
3:16:57
24.85 mi
Rank: #14338 (-315)
24M β†’ 40K
8:01 | 9:23/mi
25.2M
3:20:19
25.20 mi
Rank: #14426 (-88)
40K β†’ 25.2M
3:22 | 9:46/mi
FINISH
3:29:32
26.22 mi
Rank: #14793 (-367)
25.2M β†’ FINISH
9:13 | 9:03/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:32:56
Pace7:06 /mi
2nd Half
Distance13.11 mi
Time1:56:36
Pace8:54 /mi
πŸ“ŠPositive Split: 25.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:1120:546:4420:54
6:44
-
10K
6.21 mi11:10:5842:416:5321:47
7:01
+0:17
15K
9.32 mi11:33:011:04:446:5722:03
7:06
+0:05
20K
12.43 mi11:55:581:27:417:0422:57
7:24
+0:18
HALF
13.11 mi12:01:131:32:567:065:15
7:43
+0:19
25K
15.53 mi12:19:541:51:377:1218:41
7:43
0:00
30K
18.64 mi12:46:412:18:247:2626:47
8:38
+0:55
20M
20.00 mi13:00:552:32:387:3814:14
10:29
+1:51
21M
21.00 mi13:11:322:43:157:4710:37
10:37
+0:08
35K
21.75 mi13:17:512:49:347:486:19
8:27
-2:10
23M
23.00 mi13:28:483:00:317:5110:57
8:45
+0:18
24M
24.00 mi13:37:133:08:567:538:25
8:25
-0:20
40K
24.85 mi13:45:143:16:577:568:01
9:23
+0:58
25.2M
25.20 mi13:48:363:20:197:573:22
9:46
+0:23
FINISH
26.22 mi13:57:493:29:328:009:13
9:03
-0:43

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

πŸ“ˆPace 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

6:44 /mi

Average Pace

8:00 /mi

Slowest Pace

10:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

πŸ“ŠSegments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

1:51:37

53% of race

Time at Steady Pace

52:28

25% of race

Time at Slower Pace

45:27

22% of race

Average Pace: 7:59 /mi

Loading chart...
Faster pace (< avg)
Steady pace (β‰ˆ 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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:49:1120:546:4420:54
6:44
#6166
10K
6.21 mi11:10:5842:416:5321:47
7:01
#7559
15K
9.32 mi11:33:011:04:446:5722:03
7:06
#8171
20K
12.43 mi11:55:581:27:417:0422:57
7:24
#8770
HALF
13.11 mi12:01:131:32:567:065:15
7:43
#9032
25K
15.53 mi12:19:541:51:377:1218:41
7:43
#9580
30K
18.64 mi12:46:412:18:247:2626:47
8:38
#11242
20M
20.00 mi13:00:552:32:387:3814:14
10:29
#12732
21M
21.00 mi13:11:322:43:157:4710:37
10:37
#13530
35K
21.75 mi13:17:512:49:347:486:19
8:27
#13677
23M
23.00 mi13:28:483:00:317:5110:57
8:45
#13913
24M
24.00 mi13:37:133:08:567:538:25
8:25
#14023
40K
24.85 mi13:45:143:16:577:568:01
9:23
#14338
25.2M
25.20 mi13:48:363:20:197:573:22
9:46
#14426
FINISH
26.22 mi13:57:493:29:328:009:13
9:03
#14793
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi6166560456049260(Top 32%)7641(Top 47%)7641(Top 409%)
10K6.21 mi3.10 mi7559-13936595-9916595-9918762(Top 30%)7356(Top 45%)7356(Top 394%)
15K9.32 mi3.11 mi8171-6126996-4016996-4019260(Top 32%)7641(Top 47%)7641(Top 409%)
20K12.43 mi3.11 mi8770-5997355-3597355-35911001(Top 38%)8392(Top 51%)8392(Top 449%)
HALF13.11 mi0.68 mi9032-2627511-1567511-15614710(Top 51%)10099(Top 62%)10099(Top 541%)
25K15.53 mi2.42 mi9580-5487789-2787789-27813069(Top 45%)9255(Top 57%)9255(Top 495%)
30K18.64 mi3.11 mi11242-16628543-7548543-75417570(Top 61%)11068(Top 68%)11068(Top 593%)
20M20.00 mi1.36 mi12732-14909154-6119154-61123792(Top 82%)13898(Top 85%)13898(Top 744%)
21M21.00 mi1.00 mi13530-7989496-3429496-34222210(Top 77%)13126(Top 80%)13126(Top 703%)
35K21.75 mi0.75 mi13677-1479540-449540-4417236(Top 59%)10692(Top 65%)10692(Top 572%)
23M23.00 mi1.25 mi13913-2369611-719611-7117164(Top 59%)10585(Top 65%)10585(Top 567%)
24M24.00 mi1.00 mi14023-1109639-289639-2816377(Top 56%)10198(Top 62%)10198(Top 546%)
40K24.85 mi0.85 mi14338-3159738-999738-9919905(Top 69%)11795(Top 72%)11795(Top 631%)
25.2M25.20 mi0.35 mi14426-889765-279765-2718407(Top 63%)11067(Top 68%)11067(Top 592%)
FINISH26.22 mi1.02 mi14793-3679895-1309895-13020673(Top 71%)12181(Top 75%)12181(Top 652%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
Γ—21
+97ft-345ft

Overall

9260

Males

7641

M50-54

7641

5K→10K

3.1 - 6.2 mi

Top 30%
Γ—5
+79ft-138ft

Overall

8762

Males

7356

M50-54

7356

10K→15K

6.2 - 9.3 mi

Top 32%
Γ—3
+67ft-78ft

Overall

9260

Males

7641

M50-54

7641

15K→20K

9.3 - 12.4 mi

Top 38%
Γ—5
+106ft-86ft

Overall

11001

Males

8392

M50-54

8392

20K→HALF

12.4 - 13.1 mi

Top 51%
Γ—2
+19ft-37ft

Overall

14710

Males

10099

M50-54

10099

HALF→25K

13.1 - 15.5 mi

Top 45%
Γ—4
+66ft-88ft

Overall

13069

Males

9255

M50-54

9255

25K→30K

15.5 - 18.6 mi

Top 61%
Γ—9
+181ft-148ft

Overall

17570

Males

11068

M50-54

11068

30K→20M

18.6 - 20.0 mi

Top 82%
Γ—5
+64ft-50ft

Overall

23792

Males

13898

M50-54

13898

20M→21M

20.0 - 21.0 mi

Top 77%
Γ—8
+106ft-24ft

Overall

22210

Males

13126

M50-54

13126

21M→35K

21.0 - 21.8 mi

Top 59%
Γ—7
+17ft-86ft

Overall

17236

Males

10692

M50-54

10692

35K→23M

21.8 - 23.0 mi

Top 59%
Γ—5
+23ft-63ft

Overall

17164

Males

10585

M50-54

10585

23M→24M

23.0 - 24.0 mi

Top 56%
Γ—6
+12ft-82ft

Overall

16377

Males

10198

M50-54

10198

24M→40K

24.0 - 24.9 mi

Top 69%
Γ—1
+6ft-20ft

Overall

19905

Males

11795

M50-54

11795

40K→25.2M

24.9 - 25.2 mi

Top 63%
Γ—1
+13ft-16ft

Overall

18407

Males

11067

M50-54

11067

25.2M→FINISH

25.2 - 26.2 mi

Top 71%
Γ—2
+22ft-21ft

Overall

20673

Males

12181

M50-54

12181

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
279
Passed By
2626
Net Change
-8627
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start β†’ 5K----#6166
5K β†’ 10K11200-1393#6166#7559
10K β†’ 15K23200-612#7559#8171
15K β†’ 20K32200-599#8171#8770
20K β†’ HALF2200-262#8770#9032
HALF β†’ 25K29200-548#9032#9580
25K β†’ 30K20200-1662#9580#11242
30K β†’ 20M4200-1490#11242#12732
20M β†’ 21M7200-798#12732#13530
21M β†’ 35K27174-147#13530#13677
35K β†’ 23M45200-236#13677#13913
23M β†’ 24M39149-110#13913#14023
24M β†’ 40K18200-315#14023#14338
40K β†’ 25.2M15103-88#14338#14426
25.2M β†’ FINISH7200-367#14426#14793
TOTALS2792626-8627
πŸ“Š

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

πŸ“ˆPosition Graph

Loading...

🎨Heatmap Timeline

Loading...

πŸ”„Passing Circle

Loading...

🌊Position Flow

Loading...

πŸƒRace Lanes

Loading...

Activity Data

Upload your GPX file to see detailed activity metrics

Upload your GPX file

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

.gpx files up to 10MB

Export & Support

Download your data, get help, and share your feedback

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