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BOSTON MARATHON 2026

Zachary Kellogg

Bib: 13285•M

MI

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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 (M45-49)
#0 / 2413
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
23:51
3.11 mi
Rank: #14330
Start → 5K
23:51 | 7:41/mi
10K
48:06
6.21 mi
Rank: #14969 (-639)
5K → 10K
24:15 | 7:49/mi
15K
1:11:35
9.32 mi
Rank: #14365 (+604)
10K → 15K
23:29 | 7:34/mi
20K
1:35:25
12.43 mi
Rank: #14113 (+252)
15K → 20K
23:50 | 7:41/mi
HALF
1:40:40
13.11 mi
Rank: #14135 (-22)
20K → HALF
5:15 | 7:43/mi
25K
2:01:34
15.53 mi
Rank: #15135 (-1000)
HALF → 25K
20:54 | 8:38/mi
30K
2:26:36
18.64 mi
Rank: #14877 (+258)
25K → 30K
25:02 | 8:04/mi
20M
2:38:21
20.00 mi
Rank: #15063 (-186)
30K → 20M
11:45 | 8:40/mi
21M
2:47:25
21.00 mi
Rank: #15134 (-71)
20M → 21M
9:04 | 9:04/mi
35K
2:53:32
21.75 mi
Rank: #15157 (-23)
21M → 35K
6:07 | 8:11/mi
23M
3:04:16
23.00 mi
Rank: #15217 (-60)
35K → 23M
10:44 | 8:35/mi
24M
3:13:00
24.00 mi
Rank: #15385 (-168)
23M → 24M
8:44 | 8:44/mi
40K
3:20:33
24.85 mi
Rank: #15465 (-80)
24M → 40K
7:33 | 8:50/mi
25.2M
3:24:02
25.20 mi
Rank: #15552 (-87)
40K → 25.2M
3:29 | 10:07/mi
FINISH
3:32:35
26.22 mi
Rank: #15638 (-86)
25.2M → FINISH
8:33 | 8:24/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:40:40
Pace7:41 /mi
2nd Half
Distance13.11 mi
Time1:51:55
Pace8:33 /mi
📊Positive Split: 11.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4423:517:4123:51
7:41
-
10K
6.21 mi11:16:5948:067:4524:15
7:49
+0:08
15K
9.32 mi11:40:281:11:357:4123:29
7:34
-0:15
20K
12.43 mi12:04:181:35:257:4123:50
7:41
+0:07
HALF
13.11 mi12:09:331:40:407:415:15
7:43
+0:02
25K
15.53 mi12:30:272:01:347:5020:54
8:38
+0:55
30K
18.64 mi12:55:292:26:367:5225:02
8:04
-0:34
20M
20.00 mi13:07:142:38:217:5611:45
8:40
+0:36
21M
21.00 mi13:16:182:47:257:599:04
9:04
+0:24
35K
21.75 mi13:22:252:53:327:596:07
8:11
-0:53
23M
23.00 mi13:33:093:04:168:0110:44
8:35
+0:24
24M
24.00 mi13:41:533:13:008:038:44
8:44
+0:09
40K
24.85 mi13:49:263:20:338:057:33
8:50
+0:06
25.2M
25.20 mi13:52:553:24:028:063:29
10:07
+1:17
FINISH
26.22 mi14:01:283:32:358:078:33
8:24
-1:43

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

7:34 /mi

Average Pace

8:07 /mi

Slowest Pace

10:07 /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

2:05:42

59% of race

Time at Steady Pace

58:03

27% of race

Time at Slower Pace

28:50

14% of race

Average Pace: 8:06 /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 mi10:52:4423:517:4123:51
7:41
#14330
10K
6.21 mi11:16:5948:067:4524:15
7:49
#14969
15K
9.32 mi11:40:281:11:357:4123:29
7:34
#14365
20K
12.43 mi12:04:181:35:257:4123:50
7:41
#14113
HALF
13.11 mi12:09:331:40:407:415:15
7:43
#14135
25K
15.53 mi12:30:272:01:347:5020:54
8:38
#15135
30K
18.64 mi12:55:292:26:367:5225:02
8:04
#14877
20M
20.00 mi13:07:142:38:217:5611:45
8:40
#15063
21M
21.00 mi13:16:182:47:257:599:04
9:04
#15134
35K
21.75 mi13:22:252:53:327:596:07
8:11
#15157
23M
23.00 mi13:33:093:04:168:0110:44
8:35
#15217
24M
24.00 mi13:41:533:13:008:038:44
8:44
#15385
40K
24.85 mi13:49:263:20:338:057:33
8:50
#15465
25.2M
25.20 mi13:52:553:24:028:063:29
10:07
#15552
FINISH
26.22 mi14:01:283:32:358:078:33
8:24
#15638
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 mi14330100041000413305(Top 46%)9506(Top 58%)9506(Top 394%)
10K6.21 mi3.10 mi14969-63910216-21210216-21215680(Top 54%)10487(Top 64%)10487(Top 435%)
15K9.32 mi3.11 mi14365+6049965+2519965+25113305(Top 46%)9506(Top 58%)9506(Top 394%)
20K12.43 mi3.11 mi14113+2529855+1109855+11013469(Top 46%)9498(Top 58%)9498(Top 394%)
HALF13.11 mi0.68 mi14135-229850+59850+514725(Top 51%)10114(Top 62%)10114(Top 419%)
25K15.53 mi2.42 mi15135-100010233-38310233-38319267(Top 66%)11904(Top 73%)11904(Top 493%)
30K18.64 mi3.11 mi14877+25810100+13310100+13313924(Top 48%)9524(Top 58%)9524(Top 395%)
20M20.00 mi1.36 mi15063-18610138-3810138-3817064(Top 59%)10761(Top 66%)10761(Top 446%)
21M21.00 mi1.00 mi15134-7110137+110137+116432(Top 57%)10436(Top 64%)10436(Top 432%)
35K21.75 mi0.75 mi15157-23101371013715604(Top 54%)10017(Top 61%)10017(Top 415%)
23M23.00 mi1.25 mi15217-6010133+410133+416153(Top 56%)10166(Top 62%)10166(Top 421%)
24M24.00 mi1.00 mi15385-16810184-5110184-5118169(Top 63%)11028(Top 67%)11028(Top 457%)
40K24.85 mi0.85 mi15465-8010194-1010194-1017520(Top 60%)10662(Top 65%)10662(Top 442%)
25.2M25.20 mi0.35 mi15552-8710222-2810222-2819697(Top 68%)11695(Top 72%)11695(Top 485%)
FINISH26.22 mi1.02 mi15638-8610242-2010242-2017538(Top 60%)10668(Top 65%)10668(Top 442%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 46%
×21
+97ft-345ft

Overall

13305

Males

9506

M45-49

9506

5K→10K

3.1 - 6.2 mi

Top 54%
×5
+79ft-138ft

Overall

15680

Males

10487

M45-49

10487

10K→15K

6.2 - 9.3 mi

Top 46%
×3
+67ft-78ft

Overall

13305

Males

9506

M45-49

9506

15K→20K

9.3 - 12.4 mi

Top 46%
×5
+106ft-86ft

Overall

13469

Males

9498

M45-49

9498

20K→HALF

12.4 - 13.1 mi

Top 51%
×2
+19ft-37ft

Overall

14725

Males

10114

M45-49

10114

HALF→25K

13.1 - 15.5 mi

Top 66%
×4
+66ft-88ft

Overall

19267

Males

11904

M45-49

11904

25K→30K

15.5 - 18.6 mi

Top 48%
×9
+181ft-148ft

Overall

13924

Males

9524

M45-49

9524

30K→20M

18.6 - 20.0 mi

Top 59%
×5
+64ft-50ft

Overall

17064

Males

10761

M45-49

10761

20M→21M

20.0 - 21.0 mi

Top 57%
×8
+106ft-24ft

Overall

16432

Males

10436

M45-49

10436

21M→35K

21.0 - 21.8 mi

Top 54%
×7
+17ft-86ft

Overall

15604

Males

10017

M45-49

10017

35K→23M

21.8 - 23.0 mi

Top 56%
×5
+23ft-63ft

Overall

16153

Males

10166

M45-49

10166

23M→24M

23.0 - 24.0 mi

Top 63%
×6
+12ft-82ft

Overall

18169

Males

11028

M45-49

11028

24M→40K

24.0 - 24.9 mi

Top 60%
×1
+6ft-20ft

Overall

17520

Males

10662

M45-49

10662

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1
+13ft-16ft

Overall

19697

Males

11695

M45-49

11695

25.2M→FINISH

25.2 - 26.2 mi

Top 60%
×2
+22ft-21ft

Overall

17538

Males

10668

M45-49

10668

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1818*
Passed By
1719
Net Change
-1308
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14330
5K → 10K99200-639#14330#14969
10K → 15K634*30+604#14969#14365
15K → 20K307*55+252#14365#14113
20K → HALF3658-22#14113#14135
HALF → 25K25200-1000#14135#15135
25K → 30K330*72+258#15135#14877
30K → 20M54200-186#14877#15063
20M → 21M82153-71#15063#15134
21M → 35K4972-23#15134#15157
35K → 23M74134-60#15157#15217
23M → 24M36200-168#15217#15385
24M → 40K44124-80#15385#15465
40K → 25.2M14101-87#15465#15552
25.2M → FINISH34120-86#15552#15638
TOTALS1818*1719-1308

* 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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing