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BOSTON MARATHON 2023

Kai Terada-Herzer

Bib: 5844•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 13%
Gender (Male)
#0 / 15176
Top 22%
Division (M18-39)
#0 / 5285
Top 46%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:47
Rank: #3580
Start → 5K
20:47 | 6:41/mi
10K· 6.21 mi
41:25
Rank: #3653 (-73)
5K → 10K
20:38 | 6:38/mi
15K· 9.32 mi
1:02:04
Rank: #3626 (+27)
10K → 15K
20:39 | 6:39/mi
20K· 12.43 mi
1:22:52
Rank: #3587 (+39)
15K → 20K
20:48 | 6:42/mi
Half· 13.11 mi
1:27:26
Rank: #3619 (-32)
20K → Half
4:34 | 6:42/mi
25K· 15.53 mi
1:43:42
Rank: #3558 (+61)
Half → 25K
16:16 | 6:43/mi
30K· 18.64 mi
2:05:03
Rank: #3506 (+52)
25K → 30K
21:21 | 6:52/mi
20M
2:14:33
Rank: #3522 (-16)
30K → 20M
9:30 | 6:59/mi
21M
2:21:51
Rank: #3494 (+28)
20M → 21M
7:18 | 7:18/mi
35K· 21.75 mi
2:26:53
Rank: #3489 (+5)
21M → 35K
5:02 | 6:44/mi
23M
2:35:36
Rank: #3460 (+29)
35K → 23M
8:43 | 6:58/mi
24M
2:42:31
Rank: #3490 (-30)
23M → 24M
6:55 | 6:55/mi
40K· 24.85 mi
2:48:26
Rank: #3471 (+19)
24M → 40K
5:55 | 6:55/mi
25.2M
2:51:08
Rank: #3493 (-22)
40K → 25.2M
2:42 | 7:50/mi
Finish· 26.22 mi
2:58:15
Rank: #3564 (-71)
25.2M → Finish
7:07 | 6:59/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:26
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:30:49
Pace6:56 /mi
📊Positive Split: 3.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:1720:476:4120:47
6:41
-
10K
6.21 mi10:44:5541:256:4020:38
6:38
-0:03
15K
9.32 mi11:05:341:02:046:4020:39
6:39
+0:01
20K
12.43 mi11:26:221:22:526:4020:48
6:42
+0:03
Half
13.11 mi11:30:561:27:266:404:34
6:42
0:00
25K
15.53 mi11:47:121:43:426:4116:16
6:43
+0:01
30K
18.64 mi12:08:332:05:036:4221:21
6:52
+0:09
20M
20.00 mi12:18:032:14:336:449:30
6:59
+0:07
21M
21.00 mi12:25:212:21:516:457:18
7:18
+0:19
35K
21.75 mi12:30:232:26:536:455:02
6:44
-0:34
23M
23.00 mi12:39:062:35:366:468:43
6:58
+0:14
24M
24.00 mi12:46:012:42:316:466:55
6:55
-0:03
40K
24.85 mi12:51:562:48:266:475:55
6:55
0:00
25.2M
25.20 mi12:54:382:51:086:472:42
7:50
+0:55
Finish
26.22 mi13:01:452:58:156:487:07
6:59
-0:51

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

6:38 /mi

Average Pace

6:48 /mi

Slowest Pace

7:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:15

94% of race

Time at Steady Pace

7:18

4% of race

Time at Slower Pace

2:42

2% of race

Average Pace: 6:48 /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 mi10:24:1720:476:4120:47
6:41
#3580
10K
6.21 mi10:44:5541:256:4020:38
6:38
#3653
15K
9.32 mi11:05:341:02:046:4020:39
6:39
#3626
20K
12.43 mi11:26:221:22:526:4020:48
6:42
#3587
Half
13.11 mi11:30:561:27:266:404:34
6:42
#3619
25K
15.53 mi11:47:121:43:426:4116:16
6:43
#3558
30K
18.64 mi12:08:332:05:036:4221:21
6:52
#3506
20M
20.00 mi12:18:032:14:336:449:30
6:59
#3522
21M
21.00 mi12:25:212:21:516:457:18
7:18
#3494
35K
21.75 mi12:30:232:26:536:455:02
6:44
#3489
23M
23.00 mi12:39:062:35:366:468:43
6:58
#3460
24M
24.00 mi12:46:012:42:316:466:55
6:55
#3490
40K
24.85 mi12:51:562:48:266:475:55
6:55
#3471
25.2M
25.20 mi12:54:382:51:086:472:42
7:50
#3493
Finish
26.22 mi13:01:452:58:156:487:07
6:59
#3564
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3580337333733668(Top 14%)3459(Top 23%)3459(Top 65%)
10K6.21 mi3.10 mi3653-733446-733446-733806(Top 14%)3590(Top 24%)3590(Top 68%)
15K9.32 mi3.11 mi3626+273426+203426+203668(Top 14%)3459(Top 23%)3459(Top 65%)
20K12.43 mi3.11 mi3587+393395+313395+313544(Top 13%)3353(Top 22%)3353(Top 63%)
Half13.11 mi0.68 mi3619-323427-323427-324212(Top 16%)3936(Top 26%)3936(Top 74%)
25K15.53 mi2.42 mi3558+613371+563371+563425(Top 13%)3246(Top 21%)3246(Top 61%)
30K18.64 mi3.11 mi3506+523319+523319+523472(Top 13%)3263(Top 22%)3263(Top 62%)
20M20.00 mi1.36 mi3522-163332-133332-133961(Top 15%)3677(Top 24%)3677(Top 70%)
21M21.00 mi1.00 mi3494+283310+223310+223595(Top 14%)3335(Top 22%)3335(Top 63%)
35K21.75 mi0.75 mi3489+53306+43306+43701(Top 14%)3418(Top 23%)3418(Top 65%)
23M23.00 mi1.25 mi3460+293272+343272+343576(Top 13%)3315(Top 22%)3315(Top 63%)
24M24.00 mi1.00 mi3490-303298-263298-264243(Top 16%)3855(Top 25%)3855(Top 73%)
40K24.85 mi0.85 mi3471+193279+193279+193422(Top 13%)3123(Top 21%)3123(Top 59%)
25.2M25.20 mi0.35 mi3493-223297-183297-185447(Top 20%)4546(Top 30%)4546(Top 86%)
Finish26.22 mi1.02 mi3564-713354-573354-575084(Top 19%)4319(Top 28%)4319(Top 82%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

3668

Males

3459

M18-39

3459

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3806

Males

3590

M18-39

3590

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

3668

Males

3459

M18-39

3459

15K→20K

9.3 - 12.4 mi

Top 13%
×5stories
+106ft-86ft

Overall

3544

Males

3353

M18-39

3353

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4212

Males

3936

M18-39

3936

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3425

Males

3246

M18-39

3246

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3472

Males

3263

M18-39

3263

30K→20M

18.6 - 20.0 mi

Top 15%
×5stories
+64ft-50ft

Overall

3961

Males

3677

M18-39

3677

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3595

Males

3335

M18-39

3335

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

3701

Males

3418

M18-39

3418

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3576

Males

3315

M18-39

3315

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4243

Males

3855

M18-39

3855

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3422

Males

3123

M18-39

3123

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5447

Males

4546

M18-39

4546

25.2M→Finish

25.2 - 26.2 mi

Top 19%
×2stories
+22ft-21ft

Overall

5084

Males

4319

M18-39

4319

Passing Analysis

Category:
Athletes Passed
973
Passed By
957
Net Change
+16
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3580
5K → 10K161234-73#3580#3653
10K → 15K11992+27#3653#3626
15K → 20K10465+39#3626#3587
20K → Half1042-32#3587#3619
Half → 25K10241+61#3619#3558
25K → 30K12876+52#3558#3506
30K → 20M5571-16#3506#3522
20M → 21M6234+28#3522#3494
21M → 35K4237+5#3494#3489
35K → 23M6940+29#3489#3460
23M → 24M2858-30#3460#3490
24M → 40K5031+19#3490#3471
40K → 25.2M1335-22#3471#3493
25.2M → Finish30101-71#3493#3564
TOTALS973957+16
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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