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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Harrison Kozlowski

Bib: 4647 •M •Age: N/A

CA

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
Personalized for Harrison

Your Race Performance Report is ready

See how your race unfolded, where your performance changed, and what to focus on next.

Personalized by MyRace AI
Preview insight
Your pace by distance
Fastest segment · 6:43/mi at mile 3.1

Your report includes

  • Race Overview
  • Pacing & Splits
  • Performance Analysis
  • Segment Analysis
  • Passing Analysis
  • Improvement Opportunities
One-time purchase · Instant access · Downloadable PDF · Shareable report

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
20:52
3.11 mi
Rank: #6060
Start → 5K
20:52 | 6:43/mi
10K
41:45
6.21 mi
Rank: #6101 (-41)
5K → 10K
20:53 | 6:44/mi
15K
1:02:49
9.32 mi
Rank: #6236 (-135)
10K → 15K
21:04 | 6:47/mi
20K
1:30:01
12.43 mi
Rank: #10286 (-4050)
15K → 20K
27:12 | 8:46/mi
HALF
1:35:02
13.11 mi
Rank: #10351 (-65)
20K → HALF
5:01 | 7:22/mi
25K
1:52:35
15.53 mi
Rank: #10137 (+214)
HALF → 25K
17:33 | 7:15/mi
30K
2:18:20
18.64 mi
Rank: #11210 (-1073)
25K → 30K
25:45 | 8:18/mi
20M
2:29:46
20.00 mi
Rank: #11554 (-344)
30K → 20M
11:26 | 8:26/mi
21M
2:38:40
21.00 mi
Rank: #11785 (-231)
20M → 21M
8:54 | 8:54/mi
35K
2:47:00
21.75 mi
Rank: #12754 (-969)
21M → 35K
8:20 | 11:09/mi
23M
3:01:52
23.00 mi
Rank: #14363 (-1609)
35K → 23M
14:52 | 11:53/mi
24M
3:11:28
24.00 mi
Rank: #14881 (-518)
23M → 24M
9:36 | 9:36/mi
40K
3:20:13
24.85 mi
Rank: #15362 (-481)
24M → 40K
8:45 | 10:15/mi
25.2M
3:26:42
25.20 mi
Rank: #16239 (-877)
40K → 25.2M
6:29 | 18:48/mi
FINISH
3:34:47
26.22 mi
Rank: #16169 (+70)
25.2M → FINISH
8:05 | 7:56/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:35:02
Pace7:15 /mi
2nd Half
Distance13.11 mi
Time1:59:45
Pace9:09 /mi
📊Positive Split: 26.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:29:0820:526:4320:52
6:43
-
10K
6.21 mi10:50:0141:456:4420:53
6:44
+0:01
15K
9.32 mi11:11:051:02:496:4521:04
6:47
+0:03
20K
12.43 mi11:38:171:30:017:1527:12
8:46
+1:59
HALF
13.11 mi11:43:181:35:027:155:01
7:22
-1:24
25K
15.53 mi12:00:511:52:357:1517:33
7:15
-0:07
30K
18.64 mi12:26:362:18:207:2625:45
8:18
+1:03
20M
20.00 mi12:38:022:29:467:3011:26
8:26
+0:08
21M
21.00 mi12:46:562:38:407:348:54
8:54
+0:28
35K
21.75 mi12:55:162:47:007:418:20
11:09
+2:15
23M
23.00 mi13:10:083:01:527:5514:52
11:53
+0:44
24M
24.00 mi13:19:443:11:287:599:36
9:36
-2:17
40K
24.85 mi13:28:293:20:138:048:45
10:15
+0:39
25.2M
25.20 mi13:34:583:26:428:136:29
18:48
+8:33
FINISH
26.22 mi13:43:033:34:478:128:05
7:56
-10:52

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

6:43 /mi

Average Pace

8:12 /mi

Slowest Pace

18:48 /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

1:02:49

29% of race

Time at Steady Pace

1:53:32

53% of race

Time at Slower Pace

38:26

18% of race

Average Pace: 8:11 /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 mi10:29:0820:526:4320:52
6:43
#6060
10K
6.21 mi10:50:0141:456:4420:53
6:44
#6101
15K
9.32 mi11:11:051:02:496:4521:04
6:47
#6236
20K
12.43 mi11:38:171:30:017:1527:12
8:46
#10286
HALF
13.11 mi11:43:181:35:027:155:01
7:22
#10351
25K
15.53 mi12:00:511:52:357:1517:33
7:15
#10137
30K
18.64 mi12:26:362:18:207:2625:45
8:18
#11210
20M
20.00 mi12:38:022:29:467:3011:26
8:26
#11554
21M
21.00 mi12:46:562:38:407:348:54
8:54
#11785
35K
21.75 mi12:55:162:47:007:418:20
11:09
#12754
23M
23.00 mi13:10:083:01:527:5514:52
11:53
#14363
24M
24.00 mi13:19:443:11:287:599:36
9:36
#14881
40K
24.85 mi13:28:293:20:138:048:45
10:15
#15362
25.2M
25.20 mi13:34:583:26:428:136:29
18:48
#16239
FINISH
26.22 mi13:43:033:34:478:128:05
7:56
#16169
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 mi6060552255226644(Top 23%)5921(Top 36%)5921(Top 103%)
10K6.21 mi3.10 mi6101-415553-315553-316204(Top 21%)5625(Top 34%)5625(Top 98%)
15K9.32 mi3.11 mi6236-1355652-995652-996644(Top 23%)5921(Top 36%)5921(Top 103%)
20K12.43 mi3.11 mi10286-40508156-25048156-250420723(Top 71%)12629(Top 77%)12629(Top 221%)
HALF13.11 mi0.68 mi10351-658189-338189-3311717(Top 40%)8837(Top 54%)8837(Top 154%)
25K15.53 mi2.42 mi10137+2148052+1378052+1379187(Top 32%)7436(Top 46%)7436(Top 130%)
30K18.64 mi3.11 mi11210-10738523-4718523-47115530(Top 54%)10211(Top 62%)10211(Top 178%)
20M20.00 mi1.36 mi11554-3448662-1398662-13915678(Top 54%)10158(Top 62%)10158(Top 177%)
21M21.00 mi1.00 mi11785-2318746-848746-8415550(Top 54%)10055(Top 62%)10055(Top 176%)
35K21.75 mi0.75 mi12754-9699128-3829128-38225474(Top 88%)14608(Top 89%)14608(Top 255%)
23M23.00 mi1.25 mi14363-16099799-6719799-67125963(Top 89%)14812(Top 91%)14812(Top 259%)
24M24.00 mi1.00 mi14881-5189981-1829981-18221640(Top 75%)12684(Top 78%)12684(Top 222%)
40K24.85 mi0.85 mi15362-48110157-17610157-17622514(Top 78%)13066(Top 80%)13066(Top 228%)
25.2M25.20 mi0.35 mi16239-87710511-35410511-35428920(Top 100%)16270(Top 100%)16270(Top 284%)
FINISH26.22 mi1.02 mi16169+7010461+5010461+5014711(Top 51%)9388(Top 57%)9388(Top 164%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21
+97ft-345ft

Overall

6644

Males

5921

M18-39

5921

5K→10K

3.1 - 6.2 mi

Top 21%
×5
+79ft-138ft

Overall

6204

Males

5625

M18-39

5625

10K→15K

6.2 - 9.3 mi

Top 23%
×3
+67ft-78ft

Overall

6644

Males

5921

M18-39

5921

15K→20K

9.3 - 12.4 mi

Top 71%
×5
+106ft-86ft

Overall

20723

Males

12629

M18-39

12629

20K→HALF

12.4 - 13.1 mi

Top 40%
×2
+19ft-37ft

Overall

11717

Males

8837

M18-39

8837

HALF→25K

13.1 - 15.5 mi

Top 32%
×4
+66ft-88ft

Overall

9187

Males

7436

M18-39

7436

25K→30K

15.5 - 18.6 mi

Top 54%
×9
+181ft-148ft

Overall

15530

Males

10211

M18-39

10211

30K→20M

18.6 - 20.0 mi

Top 54%
×5
+64ft-50ft

Overall

15678

Males

10158

M18-39

10158

20M→21M

20.0 - 21.0 mi

Top 54%
×8
+106ft-24ft

Overall

15550

Males

10055

M18-39

10055

21M→35K

21.0 - 21.8 mi

Top 88%
×7
+17ft-86ft

Overall

25474

Males

14608

M18-39

14608

35K→23M

21.8 - 23.0 mi

Top 89%
×5
+23ft-63ft

Overall

25963

Males

14812

M18-39

14812

23M→24M

23.0 - 24.0 mi

Top 75%
×6
+12ft-82ft

Overall

21640

Males

12684

M18-39

12684

24M→40K

24.0 - 24.9 mi

Top 78%
×1
+6ft-20ft

Overall

22514

Males

13066

M18-39

13066

40K→25.2M

24.9 - 25.2 mi

Top 100%
×1
+13ft-16ft

Overall

28920

Males

16270

M18-39

16270

25.2M→FINISH

25.2 - 26.2 mi

Top 51%
×2
+22ft-21ft

Overall

14711

Males

9388

M18-39

9388

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
748*
Passed By
2325
Net Change
-10109
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6060
5K → 10K179200-41#6060#6101
10K → 15K92200-135#6101#6236
15K → 20K2200-4050#6236#10286
20K → HALF1176-65#10286#10351
HALF → 25K231*17+214#10351#10137
25K → 30K35200-1073#10137#11210
30K → 20M27200-344#11210#11554
20M → 21M31200-231#11554#11785
21M → 35K4200-969#11785#12754
35K → 23M2200-1609#12754#14363
23M → 24M15200-518#14363#14881
24M → 40K17200-481#14881#15362
40K → 25.2M0200-877#15362#16239
25.2M → FINISH10232+70#16239#16169
TOTALS748*2325-10109

* 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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