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BOSTON MARATHON 2023

Zachary Sims

Bib: 2471•M

GA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 1%
Gender (Male)
#0 / 15176
Top 2%
Division (M18-39)
#0 / 5285
Top 5%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:33
Rank: #632
Start → 5K
18:33 | 5:58/mi
10K· 6.21 mi
36:47
Rank: #589 (+43)
5K → 10K
18:14 | 5:52/mi
15K· 9.32 mi
55:05
Rank: #558 (+31)
10K → 15K
18:18 | 5:53/mi
20K· 12.43 mi
1:13:36
Rank: #536 (+22)
15K → 20K
18:31 | 5:58/mi
Half· 13.11 mi
1:17:38
Rank: #534 (+2)
20K → Half
4:02 | 5:55/mi
25K· 15.53 mi
1:32:02
Rank: #521 (+13)
Half → 25K
14:24 | 5:56/mi
30K· 18.64 mi
1:50:36
Rank: #478 (+43)
25K → 30K
18:34 | 5:59/mi
20M
1:58:35
Rank: #450 (+28)
30K → 20M
7:59 | 5:52/mi
21M
2:04:43
Rank: #429 (+21)
20M → 21M
6:08 | 6:08/mi
35K· 21.75 mi
2:09:00
Rank: #421 (+8)
21M → 35K
4:17 | 5:44/mi
23M
2:16:22
Rank: #393 (+28)
35K → 23M
7:22 | 5:53/mi
24M
2:22:08
Rank: #373 (+20)
23M → 24M
5:46 | 5:46/mi
40K· 24.85 mi
2:27:09
Rank: #355 (+18)
24M → 40K
5:01 | 5:52/mi
25.2M
2:29:20
Rank: #350 (+5)
40K → 25.2M
2:11 | 6:20/mi
Finish· 26.22 mi
2:35:16
Rank: #338 (+12)
25.2M → Finish
5:56 | 5:49/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:17:38
Pace5:55 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:17:38
Pace5:55 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:1818:335:5818:33
5:58
-
10K
6.21 mi10:37:3236:475:5518:14
5:52
-0:06
15K
9.32 mi10:55:5055:055:5518:18
5:53
+0:01
20K
12.43 mi11:14:211:13:365:5518:31
5:58
+0:05
Half
13.11 mi11:18:231:17:385:554:02
5:55
-0:03
25K
15.53 mi11:32:471:32:025:5514:24
5:56
+0:01
30K
18.64 mi11:51:211:50:365:5618:34
5:59
+0:03
20M
20.00 mi11:59:201:58:355:567:59
5:52
-0:07
21M
21.00 mi12:05:282:04:435:566:08
6:08
+0:16
35K
21.75 mi12:09:452:09:005:564:17
5:44
-0:24
23M
23.00 mi12:17:072:16:225:567:22
5:53
+0:09
24M
24.00 mi12:22:532:22:085:555:46
5:46
-0:07
40K
24.85 mi12:27:542:27:095:555:01
5:52
+0:06
25.2M
25.20 mi12:30:052:29:205:562:11
6:20
+0:28
Finish
26.22 mi12:36:012:35:165:565:56
5:49
-0:31

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

5:44 /mi

Average Pace

5:56 /mi

Slowest Pace

6:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:33:05

99% of race

Time at Steady Pace

2:11

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:55 /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 mi10:19:1818:335:5818:33
5:58
#632
10K
6.21 mi10:37:3236:475:5518:14
5:52
#589
15K
9.32 mi10:55:5055:055:5518:18
5:53
#558
20K
12.43 mi11:14:211:13:365:5518:31
5:58
#536
Half
13.11 mi11:18:231:17:385:554:02
5:55
#534
25K
15.53 mi11:32:471:32:025:5514:24
5:56
#521
30K
18.64 mi11:51:211:50:365:5618:34
5:59
#478
20M
20.00 mi11:59:201:58:355:567:59
5:52
#450
21M
21.00 mi12:05:282:04:435:566:08
6:08
#429
35K
21.75 mi12:09:452:09:005:564:17
5:44
#421
23M
23.00 mi12:17:072:16:225:567:22
5:53
#393
24M
24.00 mi12:22:532:22:085:555:46
5:46
#373
40K
24.85 mi12:27:542:27:095:555:01
5:52
#355
25.2M
25.20 mi12:30:052:29:205:562:11
6:20
#350
Finish
26.22 mi12:36:012:35:165:565:56
5:49
#338
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi632588588484(Top 2%)447(Top 3%)447(Top 8%)
10K6.21 mi3.10 mi589+43547+41547+41531(Top 2%)489(Top 3%)489(Top 9%)
15K9.32 mi3.11 mi558+31516+31516+31484(Top 2%)447(Top 3%)447(Top 8%)
20K12.43 mi3.11 mi536+22495+21495+21504(Top 2%)464(Top 3%)464(Top 9%)
Half13.11 mi0.68 mi534+2493+2493+2546(Top 2%)508(Top 3%)508(Top 10%)
25K15.53 mi2.42 mi521+13481+12481+12446(Top 2%)412(Top 3%)412(Top 8%)
30K18.64 mi3.11 mi478+43440+41440+41356(Top 1%)329(Top 2%)329(Top 6%)
20M20.00 mi1.36 mi450+28415+25415+25230(Top 0.9%)208(Top 1%)208(Top 4%)
21M21.00 mi1.00 mi429+21394+21394+21187(Top 0.7%)166(Top 1%)166(Top 3%)
35K21.75 mi0.75 mi421+8386+8386+8265(Top 1.0%)240(Top 2%)240(Top 5%)
23M23.00 mi1.25 mi393+28360+26360+26198(Top 0.7%)175(Top 1%)175(Top 3%)
24M24.00 mi1.00 mi373+20341+19341+19217(Top 0.8%)194(Top 1%)194(Top 4%)
40K24.85 mi0.85 mi355+18323+18323+18195(Top 0.7%)174(Top 1%)174(Top 3%)
25.2M25.20 mi0.35 mi350+5318+5318+5251(Top 0.9%)231(Top 2%)231(Top 4%)
Finish26.22 mi1.02 mi338+12307+11307+11406(Top 2%)385(Top 3%)385(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

484

Males

447

M18-39

447

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

531

Males

489

M18-39

489

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

484

Males

447

M18-39

447

15K→20K

9.3 - 12.4 mi

Top 2%
×5stories
+106ft-86ft

Overall

504

Males

464

M18-39

464

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

546

Males

508

M18-39

508

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

446

Males

412

M18-39

412

25K→30K

15.5 - 18.6 mi

Top 1%
×9stories
+181ft-148ft

Overall

356

Males

329

M18-39

329

30K→20M

18.6 - 20.0 mi

Top 0.9%
×5stories
+64ft-50ft

Overall

230

Males

208

M18-39

208

20M→21M

20.0 - 21.0 mi

Top 0.7%
×8stories
+106ft-24ft

Overall

187

Males

166

M18-39

166

21M→35K

21.0 - 21.8 mi

Top 1.0%
×7stories
+17ft-86ft

Overall

265

Males

240

M18-39

240

35K→23M

21.8 - 23.0 mi

Top 0.7%
×5stories
+23ft-63ft

Overall

198

Males

175

M18-39

175

23M→24M

23.0 - 24.0 mi

Top 0.8%
×6stories
+12ft-82ft

Overall

217

Males

194

M18-39

194

24M→40K

24.0 - 24.9 mi

Top 0.7%
×1story
+6ft-20ft

Overall

195

Males

174

M18-39

174

40K→25.2M

24.9 - 25.2 mi

Top 0.9%
×1story
+13ft-16ft

Overall

251

Males

231

M18-39

231

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

406

Males

385

M18-39

385

Passing Analysis

Category:
Athletes Passed
335
Passed By
41
Net Change
+294
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#632
5K → 10K5411+43#632#589
10K → 15K376+31#589#558
15K → 20K3210+22#558#536
20K → Half42+2#536#534
Half → 25K185+13#534#521
25K → 30K463+43#521#478
30K → 20M291+28#478#450
20M → 21M210+21#450#429
21M → 35K80+8#429#421
35K → 23M280+28#421#393
23M → 24M200+20#393#373
24M → 40K180+18#373#355
40K → 25.2M50+5#355#350
25.2M → Finish153+12#350#338
TOTALS33541+294
📊

Passing Visuals

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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing