Boston Marathon logo
BOSTON MARATHON 2023

Michael Serniak

Bib: 1743•M

MI

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 3%
Gender (Male)
#0 / 15176
Top 4%
Division (M18-39)
#0 / 5285
Top 11%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:55
Rank: #862
Start → 5K
18:55 | 6:05/mi
10K· 6.21 mi
37:13
Rank: #707 (+155)
5K → 10K
18:18 | 5:53/mi
15K· 9.32 mi
55:46
Rank: #678 (+29)
10K → 15K
18:33 | 5:58/mi
20K· 12.43 mi
1:14:38
Rank: #681 (-3)
15K → 20K
18:52 | 6:04/mi
Half· 13.11 mi
1:18:42
Rank: #675 (+6)
20K → Half
4:04 | 5:58/mi
25K· 15.53 mi
1:33:28
Rank: #675
Half → 25K
14:46 | 6:05/mi
30K· 18.64 mi
1:52:57
Rank: #692 (-17)
25K → 30K
19:29 | 6:16/mi
20M
2:01:32
Rank: #692
30K → 20M
8:35 | 6:19/mi
21M
2:08:15
Rank: #700 (-8)
20M → 21M
6:43 | 6:43/mi
35K· 21.75 mi
2:12:46
Rank: #701 (-1)
21M → 35K
4:31 | 6:02/mi
23M
2:20:43
Rank: #702 (-1)
35K → 23M
7:57 | 6:21/mi
24M
2:26:58
Rank: #712 (-10)
23M → 24M
6:15 | 6:15/mi
40K· 24.85 mi
2:32:20
Rank: #703 (+9)
24M → 40K
5:22 | 6:17/mi
25.2M
2:34:40
Rank: #696 (+7)
40K → 25.2M
2:20 | 6:46/mi
Finish· 26.22 mi
2:41:11
Rank: #715 (-19)
25.2M → Finish
6:31 | 6:24/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
Time1:18:42
Pace6:00 /mi
2nd Half
Distance13.11 mi
Time1:22:29
Pace6:18 /mi
📊Positive Split: 4.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:1518:556:0518:55
6:05
-
10K
6.21 mi10:37:3337:135:5918:18
5:53
-0:12
15K
9.32 mi10:56:0655:465:5918:33
5:58
+0:05
20K
12.43 mi11:14:581:14:386:0018:52
6:04
+0:06
Half
13.11 mi11:19:021:18:426:004:04
5:58
-0:06
25K
15.53 mi11:33:481:33:286:0114:46
6:05
+0:07
30K
18.64 mi11:53:171:52:576:0419:29
6:16
+0:11
20M
20.00 mi12:01:522:01:326:058:35
6:19
+0:03
21M
21.00 mi12:08:352:08:156:066:43
6:43
+0:24
35K
21.75 mi12:13:062:12:466:064:31
6:02
-0:41
23M
23.00 mi12:21:032:20:436:077:57
6:21
+0:19
24M
24.00 mi12:27:182:26:586:076:15
6:15
-0:06
40K
24.85 mi12:32:402:32:206:085:22
6:17
+0:02
25.2M
25.20 mi12:35:002:34:406:082:20
6:46
+0:29
Finish
26.22 mi12:41:312:41:116:096:31
6:24
-0:22

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

5:53 /mi

Average Pace

6:09 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:32:08

94% of race

Time at Steady Pace

9:03

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:09 /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 mi10:19:1518:556:0518:55
6:05
#862
10K
6.21 mi10:37:3337:135:5918:18
5:53
#707
15K
9.32 mi10:56:0655:465:5918:33
5:58
#678
20K
12.43 mi11:14:581:14:386:0018:52
6:04
#681
Half
13.11 mi11:19:021:18:426:004:04
5:58
#675
25K
15.53 mi11:33:481:33:286:0114:46
6:05
#675
30K
18.64 mi11:53:171:52:576:0419:29
6:16
#692
20M
20.00 mi12:01:522:01:326:058:35
6:19
#692
21M
21.00 mi12:08:352:08:156:066:43
6:43
#700
35K
21.75 mi12:13:062:12:466:064:31
6:02
#701
23M
23.00 mi12:21:032:20:436:077:57
6:21
#702
24M
24.00 mi12:27:182:26:586:076:15
6:15
#712
40K
24.85 mi12:32:402:32:206:085:22
6:17
#703
25.2M
25.20 mi12:35:002:34:406:082:20
6:46
#696
Finish
26.22 mi12:41:312:41:116:096:31
6:24
#715
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi862809809648(Top 2%)605(Top 4%)605(Top 11%)
10K6.21 mi3.10 mi707+155663+146663+146579(Top 2%)536(Top 4%)536(Top 10%)
15K9.32 mi3.11 mi678+29635+28635+28648(Top 2%)605(Top 4%)605(Top 11%)
20K12.43 mi3.11 mi681-3638-3638-3713(Top 3%)671(Top 4%)671(Top 13%)
Half13.11 mi0.68 mi675+6632+6632+6674(Top 3%)634(Top 4%)634(Top 12%)
25K15.53 mi2.42 mi675634-2634-2720(Top 3%)679(Top 4%)679(Top 13%)
30K18.64 mi3.11 mi692-17650-16650-16840(Top 3%)800(Top 5%)800(Top 15%)
20M20.00 mi1.36 mi692650650899(Top 3%)858(Top 6%)858(Top 16%)
21M21.00 mi1.00 mi700-8658-8658-81123(Top 4%)1069(Top 7%)1069(Top 20%)
35K21.75 mi0.75 mi701-1659-1659-1759(Top 3%)718(Top 5%)718(Top 14%)
23M23.00 mi1.25 mi702-1660-1660-1951(Top 4%)904(Top 6%)904(Top 17%)
24M24.00 mi1.00 mi712-10671-11671-111167(Top 4%)1104(Top 7%)1104(Top 21%)
40K24.85 mi0.85 mi703+9661+10661+10824(Top 3%)780(Top 5%)780(Top 15%)
25.2M25.20 mi0.35 mi696+7654+7654+71026(Top 4%)973(Top 6%)973(Top 18%)
Finish26.22 mi1.02 mi715-19673-19673-191971(Top 7%)1836(Top 12%)1836(Top 35%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

648

Males

605

M18-39

605

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

579

Males

536

M18-39

536

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

648

Males

605

M18-39

605

15K→20K

9.3 - 12.4 mi

Top 3%
×5stories
+106ft-86ft

Overall

713

Males

671

M18-39

671

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

674

Males

634

M18-39

634

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

720

Males

679

M18-39

679

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

840

Males

800

M18-39

800

30K→20M

18.6 - 20.0 mi

Top 3%
×5stories
+64ft-50ft

Overall

899

Males

858

M18-39

858

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

1123

Males

1069

M18-39

1069

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

759

Males

718

M18-39

718

35K→23M

21.8 - 23.0 mi

Top 4%
×5stories
+23ft-63ft

Overall

951

Males

904

M18-39

904

23M→24M

23.0 - 24.0 mi

Top 4%
×6stories
+12ft-82ft

Overall

1167

Males

1104

M18-39

1104

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

824

Males

780

M18-39

780

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1026

Males

973

M18-39

973

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1971

Males

1836

M18-39

1836

Passing Analysis

Category:
Athletes Passed
338
Passed By
191
Net Change
+147
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#862
5K → 10K1561+155#862#707
10K → 15K389+29#707#678
15K → 20K2124-3#678#681
20K → Half71+6#681#675
Half → 25K18180#675#675
25K → 30K1734-17#675#692
30K → 20M11110#692#692
20M → 21M1119-8#692#700
21M → 35K67-1#700#701
35K → 23M1617-1#701#702
23M → 24M1121-10#702#712
24M → 40K145+9#712#703
40K → 25.2M92+7#703#696
25.2M → Finish322-19#696#715
TOTALS338191+147
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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