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BOSTON MARATHON 2023

Zack Kennedy

Bib: 27379•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:26/mi
29:17
↑ 97↓ 3451.5%
10K· 6.21 mi
9:13/mi
57:56
↑ 79↓ 1380.4%
15K· 9.32 mi
9:14/mi
1:26:36
↑ 67↓ 78
20K· 12.43 mi
9:12/mi
1:55:10
↑ 106↓ 860.1%
Half· 13.11 mi
8:46/mi
2:01:09
↑ 19↓ 370.5%
25K· 15.53 mi
9:26/mi
2:24:01
↑ 66↓ 880.2%
30K· 18.64 mi
9:41/mi
2:54:07
↑ 181↓ 1480.2%
20M
9:25/mi
3:06:55
↑ 64↓ 500.2%
21M
10:34/mi
3:17:29
↑ 106↓ 241.6%
35K· 21.75 mi
9:39/mi
3:24:42
↑ 17↓ 861.7%
23M
10:03/mi
3:37:17
↑ 23↓ 630.6%
24M
9:59/mi
3:47:16
↓ 821.3%
40K· 24.85 mi
9:48/mi
3:55:39
↓ 200.3%
25.2M
10:18/mi
3:59:12
↑ 13↓ 160.2%
Finish· 26.22 mi
9:29/mi
4:08:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:09
Pace9:14 /mi
2nd Half
Distance13.11 mi
Time2:07:43
Pace9:45 /mi
📊Positive Split: 5.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:0229:179:2629:17
9:26
-
10K
6.21 mi12:15:4157:569:1928:39
9:13
-0:13
15K
9.32 mi12:44:211:26:369:1728:40
9:14
+0:01
20K
12.43 mi13:12:551:55:109:1628:34
9:12
-0:02
Half
13.11 mi13:18:542:01:099:145:59
8:46
-0:26
25K
15.53 mi13:41:462:24:019:1622:52
9:26
+0:40
30K
18.64 mi14:11:522:54:079:2030:06
9:41
+0:15
20M
20.00 mi14:24:403:06:559:2112:48
9:25
-0:16
21M
21.00 mi14:35:143:17:299:2410:34
10:34
+1:09
35K
21.75 mi14:42:273:24:429:257:13
9:39
-0:55
23M
23.00 mi14:55:023:37:179:2712:35
10:03
+0:24
24M
24.00 mi15:05:013:47:169:289:59
9:59
-0:04
40K
24.85 mi15:13:243:55:399:298:23
9:48
-0:11
25.2M
25.20 mi15:16:573:59:129:303:33
10:18
+0:30
Finish
26.22 mi15:26:374:08:529:309:40
9:29
-0:49

Checkpoints & Pacing

📈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

8:46 /mi

Average Pace

9:30 /mi

Slowest Pace

10:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:52

37% of race

Time at Steady Pace

1:51:56

45% of race

Time at Slower Pace

45:04

18% of race

Average Pace: 9:29 /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

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:47:0229:179:2629:17
9:26
#21862
10K
6.21 mi12:15:4157:569:1928:39
9:13
#21807
15K
9.32 mi12:44:211:26:369:1728:40
9:14
#21663
20K
12.43 mi13:12:551:55:109:1628:34
9:12
#21409
Half
13.11 mi13:18:542:01:099:145:59
8:46
#21316
25K
15.53 mi13:41:462:24:019:1622:52
9:26
#21187
30K
18.64 mi14:11:522:54:079:2030:06
9:41
#20968
20M
20.00 mi14:24:403:06:559:2112:48
9:25
#20766
21M
21.00 mi14:35:143:17:299:2410:34
10:34
#20698
35K
21.75 mi14:42:273:24:429:257:13
9:39
#20669
23M
23.00 mi14:55:023:37:179:2712:35
10:03
#20606
24M
24.00 mi15:05:013:47:169:289:59
9:59
#20630
40K
24.85 mi15:13:243:55:399:298:23
9:48
#20584
25.2M
25.20 mi15:16:573:59:129:303:33
10:18
#20540
Finish
26.22 mi15:26:374:08:529:309:40
9:29
#20515
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21862130231302321392(Top 80%)12924(Top 85%)12924(Top 245%)
10K6.21 mi3.10 mi21807+5513040-1713040-1721677(Top 81%)13010(Top 86%)13010(Top 246%)
15K9.32 mi3.11 mi21663+14412988+5212988+5221392(Top 80%)12924(Top 85%)12924(Top 245%)
20K12.43 mi3.11 mi21409+25412890+9812890+9820541(Top 77%)12538(Top 83%)12538(Top 237%)
Half13.11 mi0.68 mi21316+9312853+3712853+3719335(Top 73%)12041(Top 79%)12041(Top 228%)
25K15.53 mi2.42 mi21187+12912793+6012793+6020607(Top 77%)12536(Top 83%)12536(Top 237%)
30K18.64 mi3.11 mi20968+21912684+10912684+10920103(Top 76%)12255(Top 81%)12255(Top 232%)
20M20.00 mi1.36 mi20766+20212590+9412590+9418538(Top 70%)11473(Top 76%)11473(Top 217%)
21M21.00 mi1.00 mi20698+6812546+4412546+4419793(Top 74%)11961(Top 79%)11961(Top 226%)
35K21.75 mi0.75 mi20669+2912524+2212524+2220286(Top 76%)12160(Top 80%)12160(Top 230%)
23M23.00 mi1.25 mi20606+6312477+4712477+4720126(Top 76%)12075(Top 80%)12075(Top 228%)
24M24.00 mi1.00 mi20630-2412467+1012467+1020740(Top 78%)12313(Top 81%)12313(Top 233%)
40K24.85 mi0.85 mi20584+4612439+2812439+2819400(Top 73%)11668(Top 77%)11668(Top 221%)
25.2M25.20 mi0.35 mi20540+4412422+1712422+1718440(Top 69%)11232(Top 74%)11232(Top 213%)
Finish26.22 mi1.02 mi20515+2512399+2312399+2320059(Top 75%)12006(Top 79%)12006(Top 227%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

21392

Males

12924

M18-39

12924

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

21677

Males

13010

M18-39

13010

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

21392

Males

12924

M18-39

12924

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

20541

Males

12538

M18-39

12538

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

19335

Males

12041

M18-39

12041

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

20607

Males

12536

M18-39

12536

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

20103

Males

12255

M18-39

12255

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

18538

Males

11473

M18-39

11473

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

19793

Males

11961

M18-39

11961

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

20286

Males

12160

M18-39

12160

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

20126

Males

12075

M18-39

12075

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

20740

Males

12313

M18-39

12313

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

19400

Males

11668

M18-39

11668

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18440

Males

11232

M18-39

11232

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

20059

Males

12006

M18-39

12006

Passing Analysis

Category:
Athletes Passed
2025
Passed By
678
Net Change
+1347
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21862
5K → 10K289234+55#21862#21807
10K → 15K246102+144#21807#21663
15K → 20K29440+254#21663#21409
20K → Half952+93#21409#21316
Half → 25K17041+129#21316#21187
25K → 30K26445+219#21187#20968
30K → 20M2086+202#20968#20766
20M → 21M10335+68#20766#20698
21M → 35K5223+29#20698#20669
35K → 23M9633+63#20669#20606
23M → 24M4165-24#20606#20630
24M → 40K6418+46#20630#20584
40K → 25.2M495+44#20584#20540
25.2M → Finish5429+25#20540#20515
TOTALS2025678+1347
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing