Boston Marathon logo
BOSTON MARATHON 2023

Matthew Karpinski

Bib: 29707•M

RI

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 40%
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:48
Rank: #16167
Start → 5K
25:48 | 8:18/mi
10K· 6.21 mi
49:25
Rank: #13994 (+2173)
5K → 10K
23:37 | 7:36/mi
15K· 9.32 mi
1:12:38
Rank: #12603 (+1391)
10K → 15K
23:13 | 7:28/mi
20K· 12.43 mi
1:35:51
Rank: #11629 (+974)
15K → 20K
23:13 | 7:28/mi
Half· 13.11 mi
1:40:39
Rank: #11344 (+285)
20K → Half
4:48 | 7:02/mi
25K· 15.53 mi
1:59:27
Rank: #11205 (+139)
Half → 25K
18:48 | 7:45/mi
30K· 18.64 mi
2:24:07
Rank: #11009 (+196)
25K → 30K
24:40 | 7:56/mi
20M
2:34:47
Rank: #10834 (+175)
30K → 20M
10:40 | 7:51/mi
21M
2:43:04
Rank: #10730 (+104)
20M → 21M
8:17 | 8:17/mi
35K· 21.75 mi
2:48:53
Rank: #10699 (+31)
21M → 35K
5:49 | 7:46/mi
23M
2:59:15
Rank: #10757 (-58)
35K → 23M
10:22 | 8:17/mi
24M
3:07:30
Rank: #10837 (-80)
23M → 24M
8:15 | 8:15/mi
40K· 24.85 mi
3:14:41
Rank: #10897 (-60)
24M → 40K
7:11 | 8:24/mi
25.2M
3:17:37
Rank: #10869 (+28)
40K → 25.2M
2:56 | 8:30/mi
Finish· 26.22 mi
3:24:59
Rank: #10637 (+232)
25.2M → Finish
7:22 | 7:14/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
Time1:40:39
Pace7:41 /mi
2nd Half
Distance13.11 mi
Time1:44:20
Pace7:58 /mi
📊Positive Split: 3.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:2525:488:1825:48
8:18
-
10K
6.21 mi12:07:0249:257:5723:37
7:36
-0:42
15K
9.32 mi12:30:151:12:387:4823:13
7:28
-0:08
20K
12.43 mi12:53:281:35:517:4323:13
7:28
0:00
Half
13.11 mi12:58:161:40:397:414:48
7:02
-0:26
25K
15.53 mi13:17:041:59:277:4118:48
7:45
+0:43
30K
18.64 mi13:41:442:24:077:4424:40
7:56
+0:11
20M
20.00 mi13:52:242:34:477:4410:40
7:51
-0:05
21M
21.00 mi14:00:412:43:047:468:17
8:17
+0:26
35K
21.75 mi14:06:302:48:537:465:49
7:46
-0:31
23M
23.00 mi14:16:522:59:157:4810:22
8:17
+0:31
24M
24.00 mi14:25:073:07:307:498:15
8:15
-0:02
40K
24.85 mi14:32:183:14:417:507:11
8:24
+0:09
25.2M
25.20 mi14:35:143:17:377:512:56
8:30
+0:06
Finish
26.22 mi14:42:363:24:597:497:22
7:14
-1:16

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

7:02 /mi

Average Pace

7:49 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:22:13

40% of race

Time at Steady Pace

59:57

29% of race

Time at Slower Pace

1:02:49

31% of race

Average Pace: 7:49 /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 mi11:43:2525:488:1825:48
8:18
#16167
10K
6.21 mi12:07:0249:257:5723:37
7:36
#13994
15K
9.32 mi12:30:151:12:387:4823:13
7:28
#12603
20K
12.43 mi12:53:281:35:517:4323:13
7:28
#11629
Half
13.11 mi12:58:161:40:397:414:48
7:02
#11344
25K
15.53 mi13:17:041:59:277:4118:48
7:45
#11205
30K
18.64 mi13:41:442:24:077:4424:40
7:56
#11009
20M
20.00 mi13:52:242:34:477:4410:40
7:51
#10834
21M
21.00 mi14:00:412:43:047:468:17
8:17
#10730
35K
21.75 mi14:06:302:48:537:465:49
7:46
#10699
23M
23.00 mi14:16:522:59:157:4810:22
8:17
#10757
24M
24.00 mi14:25:073:07:307:498:15
8:15
#10837
40K
24.85 mi14:32:183:14:417:507:11
8:24
#10897
25.2M
25.20 mi14:35:143:17:377:512:56
8:30
#10869
Finish
26.22 mi14:42:363:24:597:497:22
7:14
#10637
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1616710759107599947(Top 37%)8119(Top 53%)8119(Top 154%)
10K6.21 mi3.10 mi13994+21739935+8249935+82411337(Top 43%)8805(Top 58%)8805(Top 167%)
15K9.32 mi3.11 mi12603+13919352+5839352+5839947(Top 37%)8119(Top 53%)8119(Top 154%)
20K12.43 mi3.11 mi11629+9748915+4378915+4379102(Top 34%)7560(Top 50%)7560(Top 143%)
Half13.11 mi0.68 mi11344+2858797+1188797+1186787(Top 25%)6094(Top 40%)6094(Top 115%)
25K15.53 mi2.42 mi11205+1398715+828715+8210717(Top 40%)8353(Top 55%)8353(Top 158%)
30K18.64 mi3.11 mi11009+1968582+1338582+13310427(Top 39%)8054(Top 53%)8054(Top 152%)
20M20.00 mi1.36 mi10834+1758471+1118471+1119219(Top 35%)7323(Top 48%)7323(Top 139%)
21M21.00 mi1.00 mi10730+1048399+728399+729134(Top 34%)7149(Top 47%)7149(Top 135%)
35K21.75 mi0.75 mi10699+318358+418358+4110445(Top 39%)7850(Top 52%)7850(Top 149%)
23M23.00 mi1.25 mi10757-588357+18357+111716(Top 44%)8334(Top 55%)8334(Top 158%)
24M24.00 mi1.00 mi10837-808376-198376-1912901(Top 48%)8793(Top 58%)8793(Top 166%)
40K24.85 mi0.85 mi10897-608378-28378-212680(Top 48%)8615(Top 57%)8615(Top 163%)
25.2M25.20 mi0.35 mi10869+288350+288350+289524(Top 36%)7050(Top 46%)7050(Top 133%)
Finish26.22 mi1.02 mi10637+2328214+1368214+1366627(Top 25%)5338(Top 35%)5338(Top 101%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

9947

Males

8119

M18-39

8119

5K→10K

3.1 - 6.2 mi

Top 43%
×5stories
+79ft-138ft

Overall

11337

Males

8805

M18-39

8805

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

9947

Males

8119

M18-39

8119

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9102

Males

7560

M18-39

7560

20K→Half

12.4 - 13.1 mi

Top 25%
×2stories
+19ft-37ft

Overall

6787

Males

6094

M18-39

6094

Half→25K

13.1 - 15.5 mi

Top 40%
×4stories
+66ft-88ft

Overall

10717

Males

8353

M18-39

8353

25K→30K

15.5 - 18.6 mi

Top 39%
×9stories
+181ft-148ft

Overall

10427

Males

8054

M18-39

8054

30K→20M

18.6 - 20.0 mi

Top 35%
×5stories
+64ft-50ft

Overall

9219

Males

7323

M18-39

7323

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9134

Males

7149

M18-39

7149

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

10445

Males

7850

M18-39

7850

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

11716

Males

8334

M18-39

8334

23M→24M

23.0 - 24.0 mi

Top 48%
×6stories
+12ft-82ft

Overall

12901

Males

8793

M18-39

8793

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

12680

Males

8615

M18-39

8615

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9524

Males

7050

M18-39

7050

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2stories
+22ft-21ft

Overall

6627

Males

5338

M18-39

5338

Passing Analysis

Category:
Athletes Passed
6138*
Passed By
608
Net Change
+5530
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16167
5K → 10K218411+2173#16167#13994
10K → 15K13954+1391#13994#12603
15K → 20K9751+974#12603#11629
20K → Half2850+285#11629#11344
Half → 25K19354+139#11344#11205
25K → 30K26973+196#11205#11009
30K → 20M195*20+175#11009#10834
20M → 21M12925+104#10834#10730
21M → 35K7140+31#10730#10699
35K → 23M67125-58#10699#10757
23M → 24M43123-80#10757#10837
24M → 40K46106-60#10837#10897
40K → 25.2M4820+28#10897#10869
25.2M → Finish2386+232#10869#10637
TOTALS6138*608+5530

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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