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

David Kozak

Bib: 13328•M

CA

Boston Marathon logo
0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 29021
Top 26%
Gender (Male)
#0 / 16340
Top 39%
Masters (Masters Men)
#0 / 10617
Top 26%
Age Group (M45-49)
#0 / 2413
Top 39%
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
22:22
3.11 mi
Rank: #10140
Start → 5K
22:22 | 7:12/mi
10K
44:24
6.21 mi
Rank: #9706 (+434)
5K → 10K
22:02 | 7:06/mi
15K
1:06:01
9.32 mi
Rank: #9153 (+553)
10K → 15K
21:37 | 6:58/mi
20K
1:28:00
12.43 mi
Rank: #8954 (+199)
15K → 20K
21:59 | 7:05/mi
HALF
1:32:40
13.11 mi
Rank: #8864 (+90)
20K → HALF
4:40 | 6:51/mi
25K
1:49:59
15.53 mi
Rank: #8766 (+98)
HALF → 25K
17:19 | 7:09/mi
30K
2:12:26
18.64 mi
Rank: #8456 (+310)
25K → 30K
22:27 | 7:14/mi
20M
2:22:10
20.00 mi
Rank: #8281 (+175)
30K → 20M
9:44 | 7:10/mi
21M
2:29:36
21.00 mi
Rank: #8132 (+149)
20M → 21M
7:26 | 7:26/mi
35K
2:34:50
21.75 mi
Rank: #8067 (+65)
21M → 35K
5:14 | 7:00/mi
23M
2:43:49
23.00 mi
Rank: #7930 (+137)
35K → 23M
8:59 | 7:11/mi
24M
2:50:57
24.00 mi
Rank: #7860 (+70)
23M → 24M
7:08 | 7:08/mi
40K
2:57:07
24.85 mi
Rank: #7762 (+98)
24M → 40K
6:10 | 7:13/mi
25.2M
2:59:48
25.20 mi
Rank: #7732 (+30)
40K → 25.2M
2:41 | 7:47/mi
FINISH
3:06:34
26.22 mi
Rank: #7588 (+144)
25.2M → FINISH
6:46 | 6:39/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:32:40
Pace7:05 /mi
2nd Half
Distance13.11 mi
Time1:33:54
Pace7:10 /mi
📊Positive Split: 1.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:1722:227:1222:22
7:12
-
10K
6.21 mi11:13:1944:247:0922:02
7:06
-0:06
15K
9.32 mi11:34:561:06:017:0521:37
6:58
-0:08
20K
12.43 mi11:56:551:28:007:0521:59
7:05
+0:07
HALF
13.11 mi12:01:351:32:407:054:40
6:51
-0:14
25K
15.53 mi12:18:541:49:597:0517:19
7:09
+0:18
30K
18.64 mi12:41:212:12:267:0722:27
7:14
+0:05
20M
20.00 mi12:51:052:22:107:079:44
7:10
-0:04
21M
21.00 mi12:58:312:29:367:087:26
7:26
+0:16
35K
21.75 mi13:03:452:34:507:085:14
7:00
-0:26
23M
23.00 mi13:12:442:43:497:088:59
7:11
+0:11
24M
24.00 mi13:19:522:50:577:087:08
7:08
-0:03
40K
24.85 mi13:26:022:57:077:086:10
7:13
+0:05
25.2M
25.20 mi13:28:432:59:487:092:41
7:47
+0:34
FINISH
26.22 mi13:35:293:06:347:086:46
6:39
-1:08

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

6:39 /mi

Average Pace

7:07 /mi

Slowest Pace

7:47 /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

2:56:27

95% of race

Time at Steady Pace

10:07

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:07 /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 mi10:51:1722:227:1222:22
7:12
#10140
10K
6.21 mi11:13:1944:247:0922:02
7:06
#9706
15K
9.32 mi11:34:561:06:017:0521:37
6:58
#9153
20K
12.43 mi11:56:551:28:007:0521:59
7:05
#8954
HALF
13.11 mi12:01:351:32:407:054:40
6:51
#8864
25K
15.53 mi12:18:541:49:597:0517:19
7:09
#8766
30K
18.64 mi12:41:212:12:267:0722:27
7:14
#8456
20M
20.00 mi12:51:052:22:107:079:44
7:10
#8281
21M
21.00 mi12:58:312:29:367:087:26
7:26
#8132
35K
21.75 mi13:03:452:34:507:085:14
7:00
#8067
23M
23.00 mi13:12:442:43:497:088:59
7:11
#7930
24M
24.00 mi13:19:522:50:577:087:08
7:08
#7860
40K
24.85 mi13:26:022:57:077:086:10
7:13
#7762
25.2M
25.20 mi13:28:432:59:487:092:41
7:47
#7732
FINISH
26.22 mi13:35:293:06:347:086:46
6:39
#7588
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi10140814881488265(Top 28%)7033(Top 43%)7033(Top 291%)
10K6.21 mi3.10 mi9706+4347926+2227926+2229343(Top 32%)7697(Top 47%)7697(Top 319%)
15K9.32 mi3.11 mi9153+5537601+3257601+3258265(Top 28%)7033(Top 43%)7033(Top 291%)
20K12.43 mi3.11 mi8954+1997461+1407461+1408383(Top 29%)7066(Top 43%)7066(Top 293%)
HALF13.11 mi0.68 mi8864+907408+537408+537488(Top 26%)6521(Top 40%)6521(Top 270%)
25K15.53 mi2.42 mi8766+987330+787330+788402(Top 29%)6967(Top 43%)6967(Top 289%)
30K18.64 mi3.11 mi8456+3107107+2237107+2237570(Top 26%)6353(Top 39%)6353(Top 263%)
20M20.00 mi1.36 mi8281+1756972+1356972+1356714(Top 23%)5735(Top 35%)5735(Top 238%)
21M21.00 mi1.00 mi8132+1496860+1126860+1126081(Top 21%)5175(Top 32%)5175(Top 214%)
35K21.75 mi0.75 mi8067+656804+566804+567053(Top 24%)5855(Top 36%)5855(Top 243%)
23M23.00 mi1.25 mi7930+1376687+1176687+1176623(Top 23%)5513(Top 34%)5513(Top 228%)
24M24.00 mi1.00 mi7860+706629+586629+587365(Top 25%)5896(Top 36%)5896(Top 244%)
40K24.85 mi0.85 mi7762+986540+896540+896808(Top 23%)5501(Top 34%)5501(Top 228%)
25.2M25.20 mi0.35 mi7732+306515+256515+256909(Top 24%)5500(Top 34%)5500(Top 228%)
FINISH26.22 mi1.02 mi7588+1446403+1126403+1125051(Top 17%)4230(Top 26%)4230(Top 175%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21
+97ft-345ft

Overall

8265

Males

7033

M45-49

7033

5K→10K

3.1 - 6.2 mi

Top 32%
×5
+79ft-138ft

Overall

9343

Males

7697

M45-49

7697

10K→15K

6.2 - 9.3 mi

Top 28%
×3
+67ft-78ft

Overall

8265

Males

7033

M45-49

7033

15K→20K

9.3 - 12.4 mi

Top 29%
×5
+106ft-86ft

Overall

8383

Males

7066

M45-49

7066

20K→HALF

12.4 - 13.1 mi

Top 26%
×2
+19ft-37ft

Overall

7488

Males

6521

M45-49

6521

HALF→25K

13.1 - 15.5 mi

Top 29%
×4
+66ft-88ft

Overall

8402

Males

6967

M45-49

6967

25K→30K

15.5 - 18.6 mi

Top 26%
×9
+181ft-148ft

Overall

7570

Males

6353

M45-49

6353

30K→20M

18.6 - 20.0 mi

Top 23%
×5
+64ft-50ft

Overall

6714

Males

5735

M45-49

5735

20M→21M

20.0 - 21.0 mi

Top 21%
×8
+106ft-24ft

Overall

6081

Males

5175

M45-49

5175

21M→35K

21.0 - 21.8 mi

Top 24%
×7
+17ft-86ft

Overall

7053

Males

5855

M45-49

5855

35K→23M

21.8 - 23.0 mi

Top 23%
×5
+23ft-63ft

Overall

6623

Males

5513

M45-49

5513

23M→24M

23.0 - 24.0 mi

Top 25%
×6
+12ft-82ft

Overall

7365

Males

5896

M45-49

5896

24M→40K

24.0 - 24.9 mi

Top 23%
×1
+6ft-20ft

Overall

6808

Males

5501

M45-49

5501

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1
+13ft-16ft

Overall

6909

Males

5500

M45-49

5500

25.2M→FINISH

25.2 - 26.2 mi

Top 17%
×2
+22ft-21ft

Overall

5051

Males

4230

M45-49

4230

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2924*
Passed By
372
Net Change
+2552
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10140
5K → 10K533*99+434#10140#9706
10K → 15K562*9+553#9706#9153
15K → 20K24243+199#9153#8954
20K → HALF944+90#8954#8864
HALF → 25K15153+98#8864#8766
25K → 30K34636+310#8766#8456
30K → 20M1849+175#8456#8281
20M → 21M15910+149#8281#8132
21M → 35K8419+65#8132#8067
35K → 23M16225+137#8067#7930
23M → 24M10030+70#7930#7860
24M → 40K11618+98#7860#7762
40K → 25.2M388+30#7762#7732
25.2M → FINISH1539+144#7732#7588
TOTALS2924*372+2552

* 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

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

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