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BOSTON MARATHON 2023

Zach Aldrich

Bib: 4912•M

AR

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 11%
Gender (Male)
#0 / 15176
Top 18%
Division (M18-39)
#0 / 5285
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:54
Rank: #3895
Start → 5K
6:44/mi
20:54 split
10K· 6.21 mi
41:39
Rank: #3998 (-103)
5K → 10K
6:41/mi
20:45 split
15K· 9.32 mi
1:02:31
Rank: #4078 (-80)
10K → 15K
6:43/mi
20:52 split
20K· 12.43 mi
1:23:18
Rank: #3894 (+184)
15K → 20K
6:41/mi
20:47 split
Half· 13.11 mi
1:27:54
Rank: #3930 (-36)
20K → Half
6:45/mi
4:36 split
25K· 15.53 mi
1:44:10
Rank: #3821 (+109)
Half → 25K
6:43/mi
16:16 split
30K· 18.64 mi
2:05:04
Rank: #3514 (+307)
25K → 30K
6:44/mi
20:54 split
20M
2:14:15
Rank: #3390 (+124)
30K → 20M
6:45/mi
9:11 split
21M
2:21:14
Rank: #3265 (+125)
20M → 21M
6:59/mi
6:59 split
35K· 21.75 mi
2:26:15
Rank: #3265
21M → 35K
6:42/mi
5:01 split
23M
2:34:51
Rank: #3215 (+50)
35K → 23M
6:52/mi
8:36 split
24M
2:41:29
Rank: #3174 (+41)
23M → 24M
6:38/mi
6:38 split
40K· 24.85 mi
2:47:13
Rank: #3104 (+70)
24M → 40K
6:42/mi
5:44 split
25.2M
2:49:36
Rank: #3045 (+59)
40K → 25.2M
6:55/mi
2:23 split
Finish· 26.22 mi
2:56:06
Rank: #2953 (+92)
25.2M → Finish
6:23/mi
6:30 split

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:27:54
Pace6:42 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:28:12
Pace6:44 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:5720:546:4420:54
6:44
-
10K
6.21 mi10:43:4241:396:4220:45
6:41
-0:03
15K
9.32 mi11:04:341:02:316:4220:52
6:43
+0:02
20K
12.43 mi11:25:211:23:186:4220:47
6:41
-0:02
Half
13.11 mi11:29:571:27:546:424:36
6:45
+0:04
25K
15.53 mi11:46:131:44:106:4216:16
6:43
-0:02
30K
18.64 mi12:07:072:05:046:4320:54
6:44
+0:01
20M
20.00 mi12:16:182:14:156:439:11
6:45
+0:01
21M
21.00 mi12:23:172:21:146:446:59
6:59
+0:14
35K
21.75 mi12:28:182:26:156:435:01
6:42
-0:17
23M
23.00 mi12:36:542:34:516:448:36
6:52
+0:10
24M
24.00 mi12:43:322:41:296:446:38
6:38
-0:14
40K
24.85 mi12:49:162:47:136:445:44
6:42
+0:04
25.2M
25.20 mi12:51:392:49:366:442:23
6:55
+0:13
Finish
26.22 mi12:58:092:56:066:436:30
6:23
-0:32

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

6:23 /mi

Average Pace

6:43 /mi

Slowest Pace

6:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:05:25

37% of race

Time at Steady Pace

1:50:41

63% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:43 /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 mi10:22:5720:546:4420:54
6:44
#3895
10K
6.21 mi10:43:4241:396:4220:45
6:41
#3998
15K
9.32 mi11:04:341:02:316:4220:52
6:43
#4078
20K
12.43 mi11:25:211:23:186:4220:47
6:41
#3894
Half
13.11 mi11:29:571:27:546:424:36
6:45
#3930
25K
15.53 mi11:46:131:44:106:4216:16
6:43
#3821
30K
18.64 mi12:07:072:05:046:4320:54
6:44
#3514
20M
20.00 mi12:16:182:14:156:439:11
6:45
#3390
21M
21.00 mi12:23:172:21:146:446:59
6:59
#3265
35K
21.75 mi12:28:182:26:156:435:01
6:42
#3265
23M
23.00 mi12:36:542:34:516:448:36
6:52
#3215
24M
24.00 mi12:43:322:41:296:446:38
6:38
#3174
40K
24.85 mi12:49:162:47:136:445:44
6:42
#3104
25.2M
25.20 mi12:51:392:49:366:442:23
6:55
#3045
Finish
26.22 mi12:58:092:56:066:436:30
6:23
#2953
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3895365636564266(Top 16%)3996(Top 26%)3996(Top 76%)
10K6.21 mi3.10 mi3998-1033759-1033759-1034129(Top 16%)3873(Top 26%)3873(Top 73%)
15K9.32 mi3.11 mi4078-803832-733832-734266(Top 16%)3996(Top 26%)3996(Top 76%)
20K12.43 mi3.11 mi3894+1843667+1653667+1653478(Top 13%)3292(Top 22%)3292(Top 62%)
Half13.11 mi0.68 mi3930-363698-313698-314649(Top 17%)4311(Top 28%)4311(Top 82%)
25K15.53 mi2.42 mi3821+1093608+903608+903405(Top 13%)3226(Top 21%)3226(Top 61%)
30K18.64 mi3.11 mi3514+3073327+2813327+2812548(Top 10%)2423(Top 16%)2423(Top 46%)
20M20.00 mi1.36 mi3390+1243211+1163211+1162576(Top 10%)2443(Top 16%)2443(Top 46%)
21M21.00 mi1.00 mi3265+1253094+1173094+1172090(Top 8%)1976(Top 13%)1976(Top 37%)
35K21.75 mi0.75 mi32653091+33091+33558(Top 13%)3292(Top 22%)3292(Top 62%)
23M23.00 mi1.25 mi3215+503046+453046+453038(Top 11%)2833(Top 19%)2833(Top 54%)
24M24.00 mi1.00 mi3174+413008+383008+382748(Top 10%)2557(Top 17%)2557(Top 48%)
40K24.85 mi0.85 mi3104+702941+672941+672372(Top 9%)2202(Top 15%)2202(Top 42%)
25.2M25.20 mi0.35 mi3045+592884+572884+571511(Top 6%)1428(Top 9%)1428(Top 27%)
Finish26.22 mi1.02 mi2953+922796+882796+881934(Top 7%)1805(Top 12%)1805(Top 34%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21story building
+97ft-345ft

Overall

4266

Males

3996

M18-39

3996

5K→10K

3.1 - 6.2 mi

Top 16%
×5story building
+79ft-138ft

Overall

4129

Males

3873

M18-39

3873

10K→15K

6.2 - 9.3 mi

Top 16%
×3story building
+67ft-78ft

Overall

4266

Males

3996

M18-39

3996

15K→20K

9.3 - 12.4 mi

Top 13%
×5story building
+106ft-86ft

Overall

3478

Males

3292

M18-39

3292

20K→Half

12.4 - 13.1 mi

Top 17%
×2story building
+19ft-37ft

Overall

4649

Males

4311

M18-39

4311

Half→25K

13.1 - 15.5 mi

Top 13%
×4story building
+66ft-88ft

Overall

3405

Males

3226

M18-39

3226

25K→30K

15.5 - 18.6 mi

Top 10%
×9story building
+181ft-148ft

Overall

2548

Males

2423

M18-39

2423

30K→20M

18.6 - 20.0 mi

Top 10%
×5story building
+64ft-50ft

Overall

2576

Males

2443

M18-39

2443

20M→21M

20.0 - 21.0 mi

Top 8%
×8story building
+106ft-24ft

Overall

2090

Males

1976

M18-39

1976

21M→35K

21.0 - 21.8 mi

Top 13%
×7story building
+17ft-86ft

Overall

3558

Males

3292

M18-39

3292

35K→23M

21.8 - 23.0 mi

Top 11%
×5story building
+23ft-63ft

Overall

3038

Males

2833

M18-39

2833

23M→24M

23.0 - 24.0 mi

Top 10%
×6story building
+12ft-82ft

Overall

2748

Males

2557

M18-39

2557

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2372

Males

2202

M18-39

2202

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1511

Males

1428

M18-39

1428

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2story building
+22ft-21ft

Overall

1934

Males

1805

M18-39

1805

Passing Analysis

Category:
Athletes Passed
1630
Passed By
688
Net Change
+942
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3895
5K → 10K179282-103#3895#3998
10K → 15K88168-80#3998#4078
15K → 20K22541+184#4078#3894
20K → Half844-36#3894#3930
Half → 25K14233+109#3930#3821
25K → 30K3169+307#3821#3514
30K → 20M1328+124#3514#3390
20M → 21M1283+125#3390#3265
21M → 35K31310#3265#3265
35K → 23M8232+50#3265#3215
23M → 24M5312+41#3215#3174
24M → 40K8111+70#3174#3104
40K → 25.2M590+59#3104#3045
25.2M → Finish10614+92#3045#2953
TOTALS1630688+942
📊

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