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BOSTON MARATHON 2023

David Kazmer

Bib: 11838•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 42%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 46%
Division (M55-59)
#0 / 1422
Top 30%
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
7:15/mi
22:33
↑ 97↓ 3451.5%
10K· 6.21 mi
6:54/mi
44:00
↑ 79↓ 1380.4%
15K· 9.32 mi
6:57/mi
1:05:37
↑ 67↓ 78
20K· 12.43 mi
7:46/mi
1:29:45
↑ 106↓ 860.1%
Half· 13.11 mi
7:30/mi
1:34:52
↑ 19↓ 370.5%
25K· 15.53 mi
8:05/mi
1:54:29
↑ 66↓ 880.2%
30K· 18.64 mi
7:55/mi
2:19:05
↑ 181↓ 1480.2%
20M
7:58/mi
2:29:55
↑ 64↓ 500.2%
21M
8:34/mi
2:38:29
↑ 106↓ 241.6%
35K· 21.75 mi
8:07/mi
2:44:33
↑ 17↓ 861.7%
23M
8:15/mi
2:54:53
↑ 23↓ 630.6%
24M
9:26/mi
3:04:19
↓ 821.3%
40K· 24.85 mi
11:35/mi
3:14:13
↓ 200.3%
25.2M
10:12/mi
3:17:44
↑ 13↓ 160.2%
Finish· 26.22 mi
8:41/mi
3:26:35
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:52
Pace7:14 /mi
2nd Half
Distance13.11 mi
Time1:51:43
Pace8:31 /mi
📊Positive Split: 17.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5822:337:1522:33
7:15
-
10K
6.21 mi11:11:2544:007:0521:27
6:54
-0:21
15K
9.32 mi11:33:021:05:377:0221:37
6:57
+0:03
20K
12.43 mi11:57:101:29:457:1324:08
7:46
+0:49
Half
13.11 mi12:02:171:34:527:145:07
7:30
-0:16
25K
15.53 mi12:21:541:54:297:2219:37
8:05
+0:35
30K
18.64 mi12:46:302:19:057:2824:36
7:55
-0:10
20M
20.00 mi12:57:202:29:557:3010:50
7:58
+0:03
21M
21.00 mi13:05:542:38:297:338:34
8:34
+0:36
35K
21.75 mi13:11:582:44:337:346:04
8:07
-0:27
23M
23.00 mi13:22:182:54:537:3610:20
8:15
+0:08
24M
24.00 mi13:31:443:04:197:419:26
9:26
+1:11
40K
24.85 mi13:41:383:14:137:499:54
11:35
+2:09
25.2M
25.20 mi13:45:093:17:447:513:31
10:12
-1:23
Finish
26.22 mi13:54:003:26:357:538:51
8:41
-1:31

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

6:54 /mi

Average Pace

7:53 /mi

Slowest Pace

11:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:05:37

32% of race

Time at Steady Pace

1:58:07

57% of race

Time at Slower Pace

22:51

11% of race

Average Pace: 7:53 /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 mi10:49:5822:337:1522:33
7:15
#7852
10K
6.21 mi11:11:2544:007:0521:27
6:54
#6995
15K
9.32 mi11:33:021:05:377:0221:37
6:57
#6728
20K
12.43 mi11:57:101:29:457:1324:08
7:46
#7711
Half
13.11 mi12:02:171:34:527:145:07
7:30
#7809
25K
15.53 mi12:21:541:54:297:2219:37
8:05
#8592
30K
18.64 mi12:46:302:19:057:2824:36
7:55
#8838
20M
20.00 mi12:57:202:29:557:3010:50
7:58
#8918
21M
21.00 mi13:05:542:38:297:338:34
8:34
#9005
35K
21.75 mi13:11:582:44:337:346:04
8:07
#9131
23M
23.00 mi13:22:182:54:537:3610:20
8:15
#9249
24M
24.00 mi13:31:443:04:197:419:26
9:26
#9766
40K
24.85 mi13:41:383:14:137:499:54
11:35
#10739
25.2M
25.20 mi13:45:093:17:447:513:31
10:12
#10908
Finish
26.22 mi13:54:003:26:357:538:51
8:41
#11149
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi7852687868786308(Top 24%)5703(Top 38%)5703(Top 401%)
10K6.21 mi3.10 mi6995+8576254+6246254+6246167(Top 23%)5593(Top 37%)5593(Top 393%)
15K9.32 mi3.11 mi6728+2676052+2026052+2026308(Top 24%)5703(Top 38%)5703(Top 401%)
20K12.43 mi3.11 mi7711-9836753-7016753-70111456(Top 43%)8778(Top 58%)8778(Top 617%)
Half13.11 mi0.68 mi7809-986813-606813-6010220(Top 38%)8232(Top 54%)8232(Top 579%)
25K15.53 mi2.42 mi8592-7837289-4767289-47613426(Top 50%)9531(Top 63%)9531(Top 670%)
30K18.64 mi3.11 mi8838-2467409-1207409-12010268(Top 39%)7971(Top 53%)7971(Top 561%)
20M20.00 mi1.36 mi8918-807434-257434-2510055(Top 38%)7788(Top 51%)7788(Top 548%)
21M21.00 mi1.00 mi9005-877461-277461-2710854(Top 41%)8051(Top 53%)8051(Top 566%)
35K21.75 mi0.75 mi9131-1267521-607521-6012808(Top 48%)8895(Top 59%)8895(Top 626%)
23M23.00 mi1.25 mi9249-1187561-407561-4011536(Top 43%)8251(Top 54%)8251(Top 580%)
24M24.00 mi1.00 mi9766-5177836-2757836-27518945(Top 71%)11500(Top 76%)11500(Top 809%)
40K24.85 mi0.85 mi10739-9738306-4708306-47023320(Top 88%)13458(Top 89%)13458(Top 946%)
25.2M25.20 mi0.35 mi10908-1698372-668372-6618041(Top 68%)11024(Top 73%)11024(Top 775%)
Finish26.22 mi1.02 mi11149-2418472-1008472-10016373(Top 62%)10318(Top 68%)10318(Top 726%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21story building
+97ft-345ft

Overall

6308

Males

5703

M55-59

5703

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6167

Males

5593

M55-59

5593

10K→15K

6.2 - 9.3 mi

Top 24%
×3story building
+67ft-78ft

Overall

6308

Males

5703

M55-59

5703

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

11456

Males

8778

M55-59

8778

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10220

Males

8232

M55-59

8232

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

13426

Males

9531

M55-59

9531

25K→30K

15.5 - 18.6 mi

Top 39%
×9story building
+181ft-148ft

Overall

10268

Males

7971

M55-59

7971

30K→20M

18.6 - 20.0 mi

Top 38%
×5story building
+64ft-50ft

Overall

10055

Males

7788

M55-59

7788

20M→21M

20.0 - 21.0 mi

Top 41%
×8story building
+106ft-24ft

Overall

10854

Males

8051

M55-59

8051

21M→35K

21.0 - 21.8 mi

Top 48%
×7story building
+17ft-86ft

Overall

12808

Males

8895

M55-59

8895

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

11536

Males

8251

M55-59

8251

23M→24M

23.0 - 24.0 mi

Top 71%
×6story building
+12ft-82ft

Overall

18945

Males

11500

M55-59

11500

24M→40K

24.0 - 24.9 mi

Top 88%
×1story
+6ft-20ft

Overall

23320

Males

13458

M55-59

13458

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

18041

Males

11024

M55-59

11024

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

16373

Males

10318

M55-59

10318

Passing Analysis

Category:
Athletes Passed
1507
Passed By
4803
Net Change
-3297
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7852
5K → 10K87417+857#7852#6995
10K → 15K29427+267#6995#6728
15K → 20K9992-983#6728#7711
20K → Half6104-98#7711#7809
Half → 25K10793-783#7809#8592
25K → 30K101347-246#8592#8838
30K → 20M55135-80#8838#8918
20M → 21M52139-87#8918#9005
21M → 35K14140-126#9005#9131
35K → 23M52170-118#9131#9249
23M → 24M8525-517#9249#9766
24M → 40K2974-973#9766#10739
40K → 25.2M9178-169#10739#10908
25.2M → Finish21262-241#10908#11149
TOTALS15074803-3297
📊

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