Boston Marathon logo
BOSTON MARATHON 2023

Jedediah Kowalski

Bib: 8080•M

UT

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 38%
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
23:39
Rank: #10633
Start → 5K
23:39 | 7:37/mi
10K· 6.21 mi
48:24
Rank: #12582 (-1949)
5K → 10K
24:45 | 7:58/mi
15K· 9.32 mi
1:12:35
Rank: #12547 (+35)
10K → 15K
24:11 | 7:47/mi
20K· 12.43 mi
1:36:41
Rank: #12208 (+339)
15K → 20K
24:06 | 7:45/mi
Half· 13.11 mi
1:42:07
Rank: #12312 (-104)
20K → Half
5:26 | 7:58/mi
25K· 15.53 mi
2:00:57
Rank: #12059 (+253)
Half → 25K
18:50 | 7:46/mi
30K· 18.64 mi
2:25:39
Rank: #11723 (+336)
25K → 30K
24:42 | 7:57/mi
20M
2:36:28
Rank: #11558 (+165)
30K → 20M
10:49 | 7:58/mi
21M
2:44:36
Rank: #11307 (+251)
20M → 21M
8:08 | 8:08/mi
35K· 21.75 mi
2:49:57
Rank: #11104 (+203)
21M → 35K
5:21 | 7:09/mi
23M
2:59:15
Rank: #10754 (+350)
35K → 23M
9:18 | 7:26/mi
24M
3:06:30
Rank: #10508 (+246)
23M → 24M
7:15 | 7:15/mi
40K· 24.85 mi
3:12:53
Rank: #10320 (+188)
24M → 40K
6:23 | 7:28/mi
25.2M
3:15:35
Rank: #10213 (+107)
40K → 25.2M
2:42 | 7:50/mi
Finish· 26.22 mi
3:23:12
Rank: #10105 (+108)
25.2M → Finish
7:37 | 7:28/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 Half
Distance13.11 mi
Time1:42:07
Pace7:47 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:41:05
Pace7:43 /mi
📊Negative Split: 1.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:0123:397:3723:39
7:37
-
10K
6.21 mi11:13:4648:247:4724:45
7:58
+0:21
15K
9.32 mi11:37:571:12:357:4724:11
7:47
-0:11
20K
12.43 mi12:02:031:36:417:4724:06
7:45
-0:02
Half
13.11 mi12:07:291:42:077:475:26
7:58
+0:13
25K
15.53 mi12:26:192:00:577:4718:50
7:46
-0:12
30K
18.64 mi12:51:012:25:397:4924:42
7:57
+0:11
20M
20.00 mi13:01:502:36:287:4910:49
7:58
+0:01
21M
21.00 mi13:09:582:44:367:508:08
8:08
+0:10
35K
21.75 mi13:15:192:49:577:495:21
7:09
-0:59
23M
23.00 mi13:24:372:59:157:489:18
7:26
+0:17
24M
24.00 mi13:31:523:06:307:467:15
7:15
-0:11
40K
24.85 mi13:38:153:12:537:466:23
7:28
+0:13
25.2M
25.20 mi13:40:573:15:357:462:42
7:50
+0:22
Finish
26.22 mi13:48:343:23:127:457:37
7:28
-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

7:09 /mi

Average Pace

7:45 /mi

Slowest Pace

8:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:22

64% of race

Time at Steady Pace

1:13:50

36% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:45 /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 mi10:49:0123:397:3723:39
7:37
#10633
10K
6.21 mi11:13:4648:247:4724:45
7:58
#12582
15K
9.32 mi11:37:571:12:357:4724:11
7:47
#12547
20K
12.43 mi12:02:031:36:417:4724:06
7:45
#12208
Half
13.11 mi12:07:291:42:077:475:26
7:58
#12312
25K
15.53 mi12:26:192:00:577:4718:50
7:46
#12059
30K
18.64 mi12:51:012:25:397:4924:42
7:57
#11723
20M
20.00 mi13:01:502:36:287:4910:49
7:58
#11558
21M
21.00 mi13:09:582:44:367:508:08
8:08
#11307
35K
21.75 mi13:15:192:49:577:495:21
7:09
#11104
23M
23.00 mi13:24:372:59:157:489:18
7:26
#10754
24M
24.00 mi13:31:523:06:307:467:15
7:15
#10508
40K
24.85 mi13:38:153:12:537:466:23
7:28
#10320
25.2M
25.20 mi13:40:573:15:357:462:42
7:50
#10213
Finish
26.22 mi13:48:343:23:127:457:37
7:28
#10105
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi106338466846612562(Top 47%)9320(Top 61%)9320(Top 176%)
10K6.21 mi3.10 mi12582-19499361-8959361-89514519(Top 55%)10128(Top 67%)10128(Top 192%)
15K9.32 mi3.11 mi12547+359327+349327+3412562(Top 47%)9320(Top 61%)9320(Top 176%)
20K12.43 mi3.11 mi12208+3399153+1749153+17411348(Top 43%)8726(Top 57%)8726(Top 165%)
Half13.11 mi0.68 mi12312-1049194-419194-4113993(Top 53%)9876(Top 65%)9876(Top 187%)
25K15.53 mi2.42 mi12059+2539065+1299065+12910828(Top 41%)8408(Top 55%)8408(Top 159%)
30K18.64 mi3.11 mi11723+3368885+1808885+18010501(Top 39%)8096(Top 53%)8096(Top 153%)
20M20.00 mi1.36 mi11558+1658796+898796+899951(Top 37%)7733(Top 51%)7733(Top 146%)
21M21.00 mi1.00 mi11307+2518664+1328664+1328197(Top 31%)6595(Top 43%)6595(Top 125%)
35K21.75 mi0.75 mi11104+2038567+978567+976239(Top 23%)5411(Top 36%)5411(Top 102%)
23M23.00 mi1.25 mi10754+3508354+2138354+2136032(Top 23%)5210(Top 34%)5210(Top 99%)
24M24.00 mi1.00 mi10508+2468207+1478207+1476048(Top 23%)5146(Top 34%)5146(Top 97%)
40K24.85 mi0.85 mi10320+1888093+1148093+1146510(Top 24%)5356(Top 35%)5356(Top 101%)
25.2M25.20 mi0.35 mi10213+1078034+598034+595577(Top 21%)4676(Top 31%)4676(Top 88%)
Finish26.22 mi1.02 mi10105+1087942+927942+928366(Top 31%)6382(Top 42%)6382(Top 121%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21stories
+97ft-345ft

Overall

12562

Males

9320

M18-39

9320

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

14519

Males

10128

M18-39

10128

10K→15K

6.2 - 9.3 mi

Top 47%
×3stories
+67ft-78ft

Overall

12562

Males

9320

M18-39

9320

15K→20K

9.3 - 12.4 mi

Top 43%
×5stories
+106ft-86ft

Overall

11348

Males

8726

M18-39

8726

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

13993

Males

9876

M18-39

9876

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

10828

Males

8408

M18-39

8408

25K→30K

15.5 - 18.6 mi

Top 39%
×9stories
+181ft-148ft

Overall

10501

Males

8096

M18-39

8096

30K→20M

18.6 - 20.0 mi

Top 37%
×5stories
+64ft-50ft

Overall

9951

Males

7733

M18-39

7733

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8197

Males

6595

M18-39

6595

21M→35K

21.0 - 21.8 mi

Top 23%
×7stories
+17ft-86ft

Overall

6239

Males

5411

M18-39

5411

35K→23M

21.8 - 23.0 mi

Top 23%
×5stories
+23ft-63ft

Overall

6032

Males

5210

M18-39

5210

23M→24M

23.0 - 24.0 mi

Top 23%
×6stories
+12ft-82ft

Overall

6048

Males

5146

M18-39

5146

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6510

Males

5356

M18-39

5356

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5577

Males

4676

M18-39

4676

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2stories
+22ft-21ft

Overall

8366

Males

6382

M18-39

6382

Passing Analysis

Category:
Athletes Passed
2949*
Passed By
2421
Net Change
+528
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10633
5K → 10K171966-1949#10633#12582
10K → 15K213178+35#12582#12547
15K → 20K37839+339#12547#12208
20K → Half5109-104#12208#12312
Half → 25K27724+253#12312#12059
25K → 30K37640+336#12059#11723
30K → 20M18823+165#11723#11558
20M → 21M2576+251#11558#11307
21M → 35K2041+203#11307#11104
35K → 23M3511+350#11104#10754
23M → 24M2460+246#10754#10508
24M → 40K1946+188#10508#10320
40K → 25.2M110*3+107#10320#10213
25.2M → Finish13325+108#10213#10105
TOTALS2949*2421+528

* 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