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BOSTON MARATHON 2026

Juho Seo

Bib: 30034•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Age Group (M40-44)
#0 / 2198
Race Day Weather
51°/41°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
25:29
3.11 mi
Rank: #18231
Start → 5K
25:29 | 8:13/mi
10K
50:01
6.21 mi
Rank: #17430 (+801)
5K → 10K
24:32 | 7:54/mi
15K
1:14:07
9.32 mi
Rank: #16695 (+735)
10K → 15K
24:06 | 7:46/mi
20K
1:39:39
12.43 mi
Rank: #16930 (-235)
15K → 20K
25:32 | 8:14/mi
HALF
1:45:13
13.11 mi
Rank: #17006 (-76)
20K → HALF
5:34 | 8:10/mi
25K
2:05:56
15.53 mi
Rank: #17308 (-302)
HALF → 25K
20:43 | 8:33/mi
30K
2:34:30
18.64 mi
Rank: #17939 (-631)
25K → 30K
28:34 | 9:12/mi
20M
2:48:17
20.00 mi
Rank: #18475 (-536)
30K → 20M
13:47 | 10:09/mi
21M
2:59:37
21.00 mi
Rank: #18994 (-519)
20M → 21M
11:20 | 11:20/mi
35K
3:07:11
21.75 mi
Rank: #19222 (-228)
21M → 35K
7:34 | 10:07/mi
23M
3:19:46
23.00 mi
Rank: #19519 (-297)
35K → 23M
12:35 | 10:04/mi
24M
3:29:22
24.00 mi
Rank: #19663 (-144)
23M → 24M
9:36 | 9:36/mi
40K
3:37:58
24.85 mi
Rank: #19802 (-139)
24M → 40K
8:36 | 10:04/mi
25.2M
3:41:29
25.20 mi
Rank: #19824 (-22)
40K → 25.2M
3:31 | 10:12/mi
FINISH
3:50:42
26.22 mi
Rank: #19870 (-46)
25.2M → 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
Time1:45:13
Pace8:02 /mi
2nd Half
Distance13.11 mi
Time2:05:29
Pace9:35 /mi
📊Positive Split: 19.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:2625:298:1325:29
8:13
-
10K
6.21 mi12:15:5850:018:0324:32
7:54
-0:19
15K
9.32 mi12:40:041:14:077:5824:06
7:46
-0:08
20K
12.43 mi13:05:361:39:398:0225:32
8:14
+0:28
HALF
13.11 mi13:11:101:45:138:025:34
8:10
-0:04
25K
15.53 mi13:31:532:05:568:0720:43
8:33
+0:23
30K
18.64 mi14:00:272:34:308:1828:34
9:12
+0:39
20M
20.00 mi14:14:142:48:178:2513:47
10:09
+0:57
21M
21.00 mi14:25:342:59:378:3411:20
11:20
+1:11
35K
21.75 mi14:33:083:07:118:377:34
10:07
-1:13
23M
23.00 mi14:45:433:19:468:4212:35
10:04
-0:03
24M
24.00 mi14:55:193:29:228:449:36
9:36
-0:28
40K
24.85 mi15:03:553:37:588:478:36
10:04
+0:28
25.2M
25.20 mi15:07:263:41:298:483:31
10:12
+0:08
FINISH
26.22 mi15:16:393:50:428:499:13
9:03
-1:09

Checkpoint Splits Visualizations

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

📈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

7:46 /mi

Average Pace

8:48 /mi

Slowest Pace

11:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

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

2:05:56

55% of race

Time at Steady Pace

47:23

21% of race

Time at Slower Pace

57:23

25% of race

Average Pace: 8:48 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:51:2625:298:1325:29
8:13
#18231
10K
6.21 mi12:15:5850:018:0324:32
7:54
#17430
15K
9.32 mi12:40:041:14:077:5824:06
7:46
#16695
20K
12.43 mi13:05:361:39:398:0225:32
8:14
#16930
HALF
13.11 mi13:11:101:45:138:025:34
8:10
#17006
25K
15.53 mi13:31:532:05:568:0720:43
8:33
#17308
30K
18.64 mi14:00:272:34:308:1828:34
9:12
#17939
20M
20.00 mi14:14:142:48:178:2513:47
10:09
#18475
21M
21.00 mi14:25:342:59:378:3411:20
11:20
#18994
35K
21.75 mi14:33:083:07:118:377:34
10:07
#19222
23M
23.00 mi14:45:433:19:468:4212:35
10:04
#19519
24M
24.00 mi14:55:193:29:228:449:36
9:36
#19663
40K
24.85 mi15:03:553:37:588:478:36
10:04
#19802
25.2M
25.20 mi15:07:263:41:298:483:31
10:12
#19824
FINISH
26.22 mi15:16:393:50:428:499:13
9:03
#19870
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi18231115171151714981(Top 52%)10192(Top 62%)10192(Top 464%)
10K6.21 mi3.10 mi17430+80111184+33311184+33316428(Top 57%)10786(Top 66%)10786(Top 491%)
15K9.32 mi3.11 mi16695+73510883+30110883+30114981(Top 52%)10192(Top 62%)10192(Top 464%)
20K12.43 mi3.11 mi16930-23510968-8510968-8517599(Top 61%)11246(Top 69%)11246(Top 512%)
HALF13.11 mi0.68 mi17006-7610997-2910997-2918194(Top 63%)11540(Top 71%)11540(Top 525%)
25K15.53 mi2.42 mi17308-30211127-13011127-13018817(Top 65%)11723(Top 72%)11723(Top 533%)
30K18.64 mi3.11 mi17939-63111357-23011357-23020482(Top 71%)12412(Top 76%)12412(Top 565%)
20M20.00 mi1.36 mi18475-53611569-21211569-21222930(Top 79%)13501(Top 83%)13501(Top 614%)
21M21.00 mi1.00 mi18994-51911784-21511784-21523810(Top 82%)13847(Top 85%)13847(Top 630%)
35K21.75 mi0.75 mi19222-22811875-9111875-9123426(Top 81%)13659(Top 84%)13659(Top 621%)
23M23.00 mi1.25 mi19519-29711972-9711972-9722279(Top 77%)13048(Top 80%)13048(Top 594%)
24M24.00 mi1.00 mi19663-14412024-5212024-5221647(Top 75%)12691(Top 78%)12691(Top 577%)
40K24.85 mi0.85 mi19802-13912073-4912073-4922080(Top 76%)12857(Top 79%)12857(Top 585%)
25.2M25.20 mi0.35 mi19824-2212078-512078-520070(Top 69%)11890(Top 73%)11890(Top 541%)
FINISH26.22 mi1.02 mi19870-4612092-1412092-1420684(Top 71%)12192(Top 75%)12192(Top 555%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21
+97ft-345ft

Overall

14981

Males

10192

M40-44

10192

5K→10K

3.1 - 6.2 mi

Top 57%
×5
+79ft-138ft

Overall

16428

Males

10786

M40-44

10786

10K→15K

6.2 - 9.3 mi

Top 52%
×3
+67ft-78ft

Overall

14981

Males

10192

M40-44

10192

15K→20K

9.3 - 12.4 mi

Top 61%
×5
+106ft-86ft

Overall

17599

Males

11246

M40-44

11246

20K→HALF

12.4 - 13.1 mi

Top 63%
×2
+19ft-37ft

Overall

18194

Males

11540

M40-44

11540

HALF→25K

13.1 - 15.5 mi

Top 65%
×4
+66ft-88ft

Overall

18817

Males

11723

M40-44

11723

25K→30K

15.5 - 18.6 mi

Top 71%
×9
+181ft-148ft

Overall

20482

Males

12412

M40-44

12412

30K→20M

18.6 - 20.0 mi

Top 79%
×5
+64ft-50ft

Overall

22930

Males

13501

M40-44

13501

20M→21M

20.0 - 21.0 mi

Top 82%
×8
+106ft-24ft

Overall

23810

Males

13847

M40-44

13847

21M→35K

21.0 - 21.8 mi

Top 81%
×7
+17ft-86ft

Overall

23426

Males

13659

M40-44

13659

35K→23M

21.8 - 23.0 mi

Top 77%
×5
+23ft-63ft

Overall

22279

Males

13048

M40-44

13048

23M→24M

23.0 - 24.0 mi

Top 75%
×6
+12ft-82ft

Overall

21647

Males

12691

M40-44

12691

24M→40K

24.0 - 24.9 mi

Top 76%
×1
+6ft-20ft

Overall

22080

Males

12857

M40-44

12857

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1
+13ft-16ft

Overall

20070

Males

11890

M40-44

11890

25.2M→FINISH

25.2 - 26.2 mi

Top 71%
×2
+22ft-21ft

Overall

20684

Males

12192

M40-44

12192

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2054*
Passed By
2037
Net Change
-1639
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18231
5K → 10K859*58+801#18231#17430
10K → 15K758*23+735#17430#16695
15K → 20K107200-235#16695#16930
20K → HALF1591-76#16930#17006
HALF → 25K60200-302#17006#17308
25K → 30K65200-631#17308#17939
30K → 20M24200-536#17939#18475
20M → 21M11200-519#18475#18994
21M → 35K12200-228#18994#19222
35K → 23M29200-297#19222#19519
23M → 24M39183-144#19519#19663
24M → 40K27166-139#19663#19802
40K → 25.2M1739-22#19802#19824
25.2M → FINISH3177-46#19824#19870
TOTALS2054*2037-1639

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

📊

Passing Analysis Visualizations

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

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing