Boston Marathon logo
BOSTON MARATHON 2023

Samuel Herzog

Bib: 4697•M

WI

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 6%
Gender (Male)
#0 / 15176
Top 10%
Division (M18-39)
#0 / 5285
Top 24%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:15
Rank: #2356
Start → 5K
20:15 | 6:31/mi
10K· 6.21 mi
39:58
Rank: #2143 (+213)
5K → 10K
19:43 | 6:21/mi
15K· 9.32 mi
59:43
Rank: #2035 (+108)
10K → 15K
19:45 | 6:21/mi
20K· 12.43 mi
1:19:33
Rank: #1939 (+96)
15K → 20K
19:50 | 6:23/mi
Half· 13.11 mi
1:23:52
Rank: #1932 (+7)
20K → Half
4:19 | 6:20/mi
25K· 15.53 mi
1:39:31
Rank: #1918 (+14)
Half → 25K
15:39 | 6:27/mi
30K· 18.64 mi
1:59:40
Rank: #1824 (+94)
25K → 30K
20:09 | 6:29/mi
20M
2:08:25
Rank: #1747 (+77)
30K → 20M
8:45 | 6:26/mi
21M
2:15:22
Rank: #1746 (+1)
20M → 21M
6:57 | 6:57/mi
35K· 21.75 mi
2:20:09
Rank: #1742 (+4)
21M → 35K
4:47 | 6:24/mi
23M
2:28:26
Rank: #1734 (+8)
35K → 23M
8:17 | 6:37/mi
24M
2:34:54
Rank: #1732 (+2)
23M → 24M
6:28 | 6:28/mi
40K· 24.85 mi
2:40:31
Rank: #1698 (+34)
24M → 40K
5:37 | 6:34/mi
25.2M
2:42:44
Rank: #1661 (+37)
40K → 25.2M
2:13 | 6:26/mi
Finish· 26.22 mi
2:49:18
Rank: #1663 (-2)
25.2M → Finish
6:34 | 6:26/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:52
Pace6:24 /mi
2nd Half
Distance13.11 mi
Time1:25:26
Pace6:31 /mi
📊Positive Split: 1.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:0820:156:3120:15
6:31
-
10K
6.21 mi10:41:5139:586:2619:43
6:21
-0:10
15K
9.32 mi11:01:3659:436:2419:45
6:21
0:00
20K
12.43 mi11:21:261:19:336:2419:50
6:23
+0:02
Half
13.11 mi11:25:451:23:526:244:19
6:20
-0:03
25K
15.53 mi11:41:241:39:316:2415:39
6:27
+0:07
30K
18.64 mi12:01:331:59:406:2520:09
6:29
+0:02
20M
20.00 mi12:10:182:08:256:258:45
6:26
-0:03
21M
21.00 mi12:17:152:15:226:276:57
6:57
+0:31
35K
21.75 mi12:22:022:20:096:274:47
6:24
-0:33
23M
23.00 mi12:30:192:28:266:278:17
6:37
+0:13
24M
24.00 mi12:36:472:34:546:276:28
6:28
-0:09
40K
24.85 mi12:42:242:40:316:275:37
6:34
+0:06
25.2M
25.20 mi12:44:372:42:446:272:13
6:26
-0:08
Finish
26.22 mi12:51:112:49:186:286:34
6:26
0:00

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

6:20 /mi

Average Pace

6:28 /mi

Slowest Pace

6:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:21

96% of race

Time at Steady Pace

6:57

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:27 /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 mi10:22:0820:156:3120:15
6:31
#2356
10K
6.21 mi10:41:5139:586:2619:43
6:21
#2143
15K
9.32 mi11:01:3659:436:2419:45
6:21
#2035
20K
12.43 mi11:21:261:19:336:2419:50
6:23
#1939
Half
13.11 mi11:25:451:23:526:244:19
6:20
#1932
25K
15.53 mi11:41:241:39:316:2415:39
6:27
#1918
30K
18.64 mi12:01:331:59:406:2520:09
6:29
#1824
20M
20.00 mi12:10:182:08:256:258:45
6:26
#1747
21M
21.00 mi12:17:152:15:226:276:57
6:57
#1746
35K
21.75 mi12:22:022:20:096:274:47
6:24
#1742
23M
23.00 mi12:30:192:28:266:278:17
6:37
#1734
24M
24.00 mi12:36:472:34:546:276:28
6:28
#1732
40K
24.85 mi12:42:242:40:316:275:37
6:34
#1698
25.2M
25.20 mi12:44:372:42:446:272:13
6:26
#1661
Finish
26.22 mi12:51:112:49:186:286:34
6:26
#1663
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2356224622461896(Top 7%)1816(Top 12%)1816(Top 34%)
10K6.21 mi3.10 mi2143+2132052+1942052+1941959(Top 7%)1876(Top 12%)1876(Top 35%)
15K9.32 mi3.11 mi2035+1081950+1021950+1021896(Top 7%)1816(Top 12%)1816(Top 34%)
20K12.43 mi3.11 mi1939+961857+931857+931726(Top 6%)1652(Top 11%)1652(Top 31%)
Half13.11 mi0.68 mi1932+71850+71850+71865(Top 7%)1790(Top 12%)1790(Top 34%)
25K15.53 mi2.42 mi1918+141836+141836+141962(Top 7%)1878(Top 12%)1878(Top 36%)
30K18.64 mi3.11 mi1824+941745+911745+911519(Top 6%)1454(Top 10%)1454(Top 28%)
20M20.00 mi1.36 mi1747+771671+741671+741252(Top 5%)1193(Top 8%)1193(Top 23%)
21M21.00 mi1.00 mi1746+1167116711918(Top 7%)1818(Top 12%)1818(Top 34%)
35K21.75 mi0.75 mi1742+41668+31668+31929(Top 7%)1833(Top 12%)1833(Top 35%)
23M23.00 mi1.25 mi1734+81659+91659+91819(Top 7%)1723(Top 11%)1723(Top 33%)
24M24.00 mi1.00 mi1732+21656+31656+31939(Top 7%)1820(Top 12%)1820(Top 34%)
40K24.85 mi0.85 mi1698+341623+331623+331779(Top 7%)1674(Top 11%)1674(Top 32%)
25.2M25.20 mi0.35 mi1661+371586+371586+37432(Top 2%)407(Top 3%)407(Top 8%)
Finish26.22 mi1.02 mi1663-21587-11587-12178(Top 8%)2018(Top 13%)2018(Top 38%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 7%
×21stories
+97ft-345ft

Overall

1896

Males

1816

M18-39

1816

5K→10K

3.1 - 6.2 mi

Top 7%
×5stories
+79ft-138ft

Overall

1959

Males

1876

M18-39

1876

10K→15K

6.2 - 9.3 mi

Top 7%
×3stories
+67ft-78ft

Overall

1896

Males

1816

M18-39

1816

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1726

Males

1652

M18-39

1652

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1865

Males

1790

M18-39

1790

Half→25K

13.1 - 15.5 mi

Top 7%
×4stories
+66ft-88ft

Overall

1962

Males

1878

M18-39

1878

25K→30K

15.5 - 18.6 mi

Top 6%
×9stories
+181ft-148ft

Overall

1519

Males

1454

M18-39

1454

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1252

Males

1193

M18-39

1193

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1918

Males

1818

M18-39

1818

21M→35K

21.0 - 21.8 mi

Top 7%
×7stories
+17ft-86ft

Overall

1929

Males

1833

M18-39

1833

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

1819

Males

1723

M18-39

1723

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

1939

Males

1820

M18-39

1820

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

1779

Males

1674

M18-39

1674

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

432

Males

407

M18-39

407

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

2178

Males

2018

M18-39

2018

Passing Analysis

Category:
Athletes Passed
954
Passed By
261
Net Change
+693
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2356
5K → 10K25239+213#2356#2143
10K → 15K12921+108#2143#2035
15K → 20K11418+96#2035#1939
20K → Half169+7#1939#1932
Half → 25K4430+14#1932#1918
25K → 30K11016+94#1918#1824
30K → 20M803+77#1824#1747
20M → 21M2423+1#1747#1746
21M → 35K2016+4#1746#1742
35K → 23M3123+8#1742#1734
23M → 24M2725+2#1734#1732
24M → 40K417+34#1732#1698
40K → 25.2M370+37#1698#1661
25.2M → Finish2931-2#1661#1663
TOTALS954261+693
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing