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BOSTON MARATHON 2023

John Zimmerman

Bib: 14472•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 36%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 40%
Division (M50-54)
#0 / 2052
Top 38%
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
7:40/mi
23:48
↑ 97↓ 3451.5%
10K· 6.21 mi
7:39/mi
47:35
↑ 79↓ 1380.4%
15K· 9.32 mi
7:34/mi
1:11:05
↑ 67↓ 78
20K· 12.43 mi
7:36/mi
1:34:41
↑ 106↓ 860.1%
Half· 13.11 mi
7:31/mi
1:39:49
↑ 19↓ 370.5%
25K· 15.53 mi
7:33/mi
1:58:08
↑ 66↓ 880.2%
30K· 18.64 mi
7:33/mi
2:21:36
↑ 181↓ 1480.2%
20M
7:30/mi
2:31:47
↑ 64↓ 500.2%
21M
7:55/mi
2:39:42
↑ 106↓ 241.6%
35K· 21.75 mi
7:17/mi
2:45:09
↑ 17↓ 861.7%
23M
7:46/mi
2:54:52
↑ 23↓ 630.6%
24M
7:46/mi
3:02:38
↓ 821.3%
40K· 24.85 mi
8:11/mi
3:09:38
↓ 200.3%
25.2M
9:57/mi
3:13:04
↑ 13↓ 160.2%
Finish· 26.22 mi
8:21/mi
3:21:35
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:49
Pace7:37 /mi
2nd Half
Distance13.11 mi
Time1:41:46
Pace7:46 /mi
📊Positive Split: 2.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:5023:487:4023:48
7:40
-
10K
6.21 mi11:16:3747:357:3923:47
7:39
-0:01
15K
9.32 mi11:40:071:11:057:3823:30
7:34
-0:05
20K
12.43 mi12:03:431:34:417:3723:36
7:36
+0:02
Half
13.11 mi12:08:511:39:497:375:08
7:31
-0:05
25K
15.53 mi12:27:101:58:087:3618:19
7:33
+0:02
30K
18.64 mi12:50:382:21:367:3623:28
7:33
0:00
20M
20.00 mi13:00:492:31:477:3510:11
7:30
-0:03
21M
21.00 mi13:08:442:39:427:367:55
7:55
+0:25
35K
21.75 mi13:14:112:45:097:365:27
7:17
-0:38
23M
23.00 mi13:23:542:54:527:369:43
7:46
+0:29
24M
24.00 mi13:31:403:02:387:377:46
7:46
0:00
40K
24.85 mi13:38:403:09:387:387:00
8:11
+0:25
25.2M
25.20 mi13:42:063:13:047:403:26
9:57
+1:46
Finish
26.22 mi13:50:373:21:357:428:31
8:21
-1:36

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

7:17 /mi

Average Pace

7:42 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

5:27

3% of race

Time at Steady Pace

2:57:11

88% of race

Time at Slower Pace

18:57

9% of race

Average Pace: 7:41 /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 mi10:52:5023:487:4023:48
7:40
#11100
10K
6.21 mi11:16:3747:357:3923:47
7:39
#11409
15K
9.32 mi11:40:071:11:057:3823:30
7:34
#11154
20K
12.43 mi12:03:431:34:417:3723:36
7:36
#10858
Half
13.11 mi12:08:511:39:497:375:08
7:31
#10844
25K
15.53 mi12:27:101:58:087:3618:19
7:33
#10516
30K
18.64 mi12:50:382:21:367:3623:28
7:33
#9937
20M
20.00 mi13:00:492:31:477:3510:11
7:30
#9660
21M
21.00 mi13:08:442:39:427:367:55
7:55
#9470
35K
21.75 mi13:14:112:45:097:365:27
7:17
#9351
23M
23.00 mi13:23:542:54:527:369:43
7:46
#9244
24M
24.00 mi13:31:403:02:387:377:46
7:46
#9217
40K
24.85 mi13:38:403:09:387:387:00
8:11
#9283
25.2M
25.20 mi13:42:063:13:047:403:26
9:57
#9414
Finish
26.22 mi13:50:373:21:357:428:31
8:21
#9610
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi111008704870410684(Top 40%)8492(Top 56%)8492(Top 414%)
10K6.21 mi3.10 mi11409-3098840-1368840-13611817(Top 44%)9026(Top 59%)9026(Top 440%)
15K9.32 mi3.11 mi11154+2558721+1198721+11910684(Top 40%)8492(Top 56%)8492(Top 414%)
20K12.43 mi3.11 mi10858+2968573+1488573+14810056(Top 38%)8102(Top 53%)8102(Top 395%)
Half13.11 mi0.68 mi10844+148567+68567+610365(Top 39%)8274(Top 55%)8274(Top 403%)
25K15.53 mi2.42 mi10516+3288398+1698398+1699185(Top 35%)7547(Top 50%)7547(Top 368%)
30K18.64 mi3.11 mi9937+5798059+3398059+3397607(Top 29%)6459(Top 43%)6459(Top 315%)
20M20.00 mi1.36 mi9660+2777870+1897870+1896756(Top 25%)5816(Top 38%)5816(Top 283%)
21M21.00 mi1.00 mi9470+1907737+1337737+1336838(Top 26%)5772(Top 38%)5772(Top 281%)
35K21.75 mi0.75 mi9351+1197646+917646+917050(Top 26%)5935(Top 39%)5935(Top 289%)
23M23.00 mi1.25 mi9244+1077558+887558+888147(Top 31%)6495(Top 43%)6495(Top 317%)
24M24.00 mi1.00 mi9217+277523+357523+359515(Top 36%)7163(Top 47%)7163(Top 349%)
40K24.85 mi0.85 mi9283-667533-107533-1011238(Top 42%)7943(Top 52%)7943(Top 387%)
25.2M25.20 mi0.35 mi9414-1317595-627595-6217127(Top 64%)10596(Top 70%)10596(Top 516%)
Finish26.22 mi1.02 mi9610-1967677-827677-8214410(Top 54%)9430(Top 62%)9430(Top 460%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

10684

Males

8492

M50-54

8492

5K→10K

3.1 - 6.2 mi

Top 44%
×5story building
+79ft-138ft

Overall

11817

Males

9026

M50-54

9026

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

10684

Males

8492

M50-54

8492

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10056

Males

8102

M50-54

8102

20K→Half

12.4 - 13.1 mi

Top 39%
×2story building
+19ft-37ft

Overall

10365

Males

8274

M50-54

8274

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9185

Males

7547

M50-54

7547

25K→30K

15.5 - 18.6 mi

Top 29%
×9story building
+181ft-148ft

Overall

7607

Males

6459

M50-54

6459

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

6756

Males

5816

M50-54

5816

20M→21M

20.0 - 21.0 mi

Top 26%
×8story building
+106ft-24ft

Overall

6838

Males

5772

M50-54

5772

21M→35K

21.0 - 21.8 mi

Top 26%
×7story building
+17ft-86ft

Overall

7050

Males

5935

M50-54

5935

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8147

Males

6495

M50-54

6495

23M→24M

23.0 - 24.0 mi

Top 36%
×6story building
+12ft-82ft

Overall

9515

Males

7163

M50-54

7163

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

11238

Males

7943

M50-54

7943

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

17127

Males

10596

M50-54

10596

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

14410

Males

9430

M50-54

9430

Passing Analysis

Category:
Athletes Passed
2673*
Passed By
1183
Net Change
+1490
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11100
5K → 10K175484-309#11100#11409
10K → 15K33883+255#11409#11154
15K → 20K32832+296#11154#10858
20K → Half4026+14#10858#10844
Half → 25K3357+328#10844#10516
25K → 30K585*6+579#10516#9937
30K → 20M2803+277#9937#9660
20M → 21M1922+190#9660#9470
21M → 35K1256+119#9470#9351
35K → 23M13326+107#9351#9244
23M → 24M6942+27#9244#9217
24M → 40K47113-66#9217#9283
40K → 25.2M9140-131#9283#9414
25.2M → Finish17213-196#9414#9610
TOTALS2673*1183+1490

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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