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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

John Henry Slonieski

Bib: 29242 •M •Age: N/A

NY

Boston Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Age Group (M18-39)
#0 / 5723
Race Day Weather
51°/41°F
overcast clouds
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  • Qualification readiness
  • Segment-by-segment breakdown
  • Personalized race insights
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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
27:01
3.11 mi
Rank: #21151
Start → 5K
27:01 | 8:42/mi
10K
53:27
6.21 mi
Rank: #20757 (+394)
5K → 10K
26:26 | 8:31/mi
15K
1:19:19
9.32 mi
Rank: #20182 (+575)
10K → 15K
25:52 | 8:20/mi
20K
1:45:53
12.43 mi
Rank: #20022 (+160)
15K → 20K
26:34 | 8:34/mi
HALF
1:51:36
13.11 mi
Rank: #20006 (+16)
20K → HALF
5:43 | 8:24/mi
25K
2:11:57
15.53 mi
Rank: #19681 (+325)
HALF → 25K
20:21 | 8:24/mi
30K
2:38:48
18.64 mi
Rank: #19322 (+359)
25K → 30K
26:51 | 8:39/mi
20M
2:50:21
20.00 mi
Rank: #19094 (+228)
30K → 20M
11:33 | 8:31/mi
21M
2:58:52
21.00 mi
Rank: #18749 (+345)
20M → 21M
8:31 | 8:31/mi
35K
3:04:36
21.75 mi
Rank: #18543 (+206)
21M → 35K
5:44 | 7:40/mi
23M
3:14:17
23.00 mi
Rank: #18135 (+408)
35K → 23M
9:41 | 7:45/mi
24M
3:21:36
24.00 mi
Rank: #17763 (+372)
23M → 24M
7:19 | 7:19/mi
40K
3:27:55
24.85 mi
Rank: #17406 (+357)
24M → 40K
6:19 | 7:24/mi
25.2M
3:30:41
25.20 mi
Rank: #17265 (+141)
40K → 25.2M
2:46 | 8:02/mi
FINISH
3:37:52
26.22 mi
Rank: #16945 (+320)
25.2M → FINISH
7:11 | 7:03/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half
via HALF
Distance13.11 mi
Time1:51:36
Pace8:31 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:46:16
Pace8:07 /mi
📊Negative Split: 4.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:3327:018:4227:01
8:42
-
10K
6.21 mi12:20:5953:278:3726:26
8:31
-0:11
15K
9.32 mi12:46:511:19:198:3125:52
8:20
-0:11
20K
12.43 mi13:13:251:45:538:3226:34
8:34
+0:14
HALF
13.11 mi13:19:081:51:368:315:43
8:24
-0:10
25K
15.53 mi13:39:292:11:578:3020:21
8:24
0:00
30K
18.64 mi14:06:202:38:488:3226:51
8:39
+0:15
20M
20.00 mi14:17:532:50:218:3211:33
8:31
-0:08
21M
21.00 mi14:26:242:58:528:328:31
8:31
0:00
35K
21.75 mi14:32:083:04:368:305:44
7:40
-0:51
23M
23.00 mi14:41:493:14:178:279:41
7:45
+0:05
24M
24.00 mi14:49:083:21:368:257:19
7:19
-0:26
40K
24.85 mi14:55:273:27:558:226:19
7:24
+0:05
25.2M
25.20 mi14:58:133:30:418:222:46
8:02
+0:38
FINISH
26.22 mi15:05:243:37:528:197:11
7:03
-0:59

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

7:03 /mi

Average Pace

8:19 /mi

Slowest Pace

8:42 /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

39:00

18% of race

Time at Steady Pace

2:31:51

70% of race

Time at Slower Pace

27:01

12% of race

Average Pace: 8:19 /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 mi11:54:3327:018:4227:01
8:42
#21151
10K
6.21 mi12:20:5953:278:3726:26
8:31
#20757
15K
9.32 mi12:46:511:19:198:3125:52
8:20
#20182
20K
12.43 mi13:13:251:45:538:3226:34
8:34
#20022
HALF
13.11 mi13:19:081:51:368:315:43
8:24
#20006
25K
15.53 mi13:39:292:11:578:3020:21
8:24
#19681
30K
18.64 mi14:06:202:38:488:3226:51
8:39
#19322
20M
20.00 mi14:17:532:50:218:3211:33
8:31
#19094
21M
21.00 mi14:26:242:58:528:328:31
8:31
#18749
35K
21.75 mi14:32:083:04:368:305:44
7:40
#18543
23M
23.00 mi14:41:493:14:178:279:41
7:45
#18135
24M
24.00 mi14:49:083:21:368:257:19
7:19
#17763
40K
24.85 mi14:55:273:27:558:226:19
7:24
#17406
25.2M
25.20 mi14:58:133:30:418:222:46
8:02
#17265
FINISH
26.22 mi15:05:243:37:528:197:11
7:03
#16945
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21151128001280019121(Top 66%)11930(Top 73%)11930(Top 208%)
10K6.21 mi3.10 mi20757+39412645+15512645+15520378(Top 70%)12492(Top 76%)12492(Top 218%)
15K9.32 mi3.11 mi20182+57512384+26112384+26119121(Top 66%)11930(Top 73%)11930(Top 208%)
20K12.43 mi3.11 mi20022+16012291+9312291+9319590(Top 68%)12099(Top 74%)12099(Top 211%)
HALF13.11 mi0.68 mi20006+1612281+1012281+1019501(Top 67%)12083(Top 74%)12083(Top 211%)
25K15.53 mi2.42 mi19681+32512143+13812143+13817914(Top 62%)11328(Top 69%)11328(Top 198%)
30K18.64 mi3.11 mi19322+35911948+19511948+19517684(Top 61%)11114(Top 68%)11114(Top 194%)
20M20.00 mi1.36 mi19094+22811838+11011838+11016207(Top 56%)10391(Top 64%)10391(Top 182%)
21M21.00 mi1.00 mi18749+34511674+16411674+16413213(Top 46%)9011(Top 55%)9011(Top 157%)
35K21.75 mi0.75 mi18543+20611580+9411580+9412065(Top 42%)8477(Top 52%)8477(Top 148%)
23M23.00 mi1.25 mi18135+40811369+21111369+21110544(Top 36%)7643(Top 47%)7643(Top 134%)
24M24.00 mi1.00 mi17763+37211189+18011189+1808729(Top 30%)6667(Top 41%)6667(Top 116%)
40K24.85 mi0.85 mi17406+35711019+17011019+1708066(Top 28%)6226(Top 38%)6226(Top 109%)
25.2M25.20 mi0.35 mi17265+14110953+6610953+668501(Top 29%)6397(Top 39%)6397(Top 112%)
FINISH26.22 mi1.02 mi16945+32010794+15910794+1597971(Top 27%)6044(Top 37%)6044(Top 106%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21
+97ft-345ft

Overall

19121

Males

11930

M18-39

11930

5K→10K

3.1 - 6.2 mi

Top 70%
×5
+79ft-138ft

Overall

20378

Males

12492

M18-39

12492

10K→15K

6.2 - 9.3 mi

Top 66%
×3
+67ft-78ft

Overall

19121

Males

11930

M18-39

11930

15K→20K

9.3 - 12.4 mi

Top 68%
×5
+106ft-86ft

Overall

19590

Males

12099

M18-39

12099

20K→HALF

12.4 - 13.1 mi

Top 67%
×2
+19ft-37ft

Overall

19501

Males

12083

M18-39

12083

HALF→25K

13.1 - 15.5 mi

Top 62%
×4
+66ft-88ft

Overall

17914

Males

11328

M18-39

11328

25K→30K

15.5 - 18.6 mi

Top 61%
×9
+181ft-148ft

Overall

17684

Males

11114

M18-39

11114

30K→20M

18.6 - 20.0 mi

Top 56%
×5
+64ft-50ft

Overall

16207

Males

10391

M18-39

10391

20M→21M

20.0 - 21.0 mi

Top 46%
×8
+106ft-24ft

Overall

13213

Males

9011

M18-39

9011

21M→35K

21.0 - 21.8 mi

Top 42%
×7
+17ft-86ft

Overall

12065

Males

8477

M18-39

8477

35K→23M

21.8 - 23.0 mi

Top 36%
×5
+23ft-63ft

Overall

10544

Males

7643

M18-39

7643

23M→24M

23.0 - 24.0 mi

Top 30%
×6
+12ft-82ft

Overall

8729

Males

6667

M18-39

6667

24M→40K

24.0 - 24.9 mi

Top 28%
×1
+6ft-20ft

Overall

8066

Males

6226

M18-39

6226

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1
+13ft-16ft

Overall

8501

Males

6397

M18-39

6397

25.2M→FINISH

25.2 - 26.2 mi

Top 27%
×2
+22ft-21ft

Overall

7971

Males

6044

M18-39

6044

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
4541*
Passed By
335
Net Change
+4206
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21151
5K → 10K545*151+394#21151#20757
10K → 15K618*43+575#20757#20182
15K → 20K231*71+160#20182#20022
20K → HALF3216+16#20022#20006
HALF → 25K331*6+325#20006#19681
25K → 30K390*31+359#19681#19322
30K → 20M243*15+228#19322#19094
20M → 21M345*0+345#19094#18749
21M → 35K207*1+206#18749#18543
35K → 23M408*0+408#18543#18135
23M → 24M372*0+372#18135#17763
24M → 40K358*1+357#17763#17406
40K → 25.2M1410+141#17406#17265
25.2M → FINISH320*0+320#17265#16945
TOTALS4541*335+4206

* 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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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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