Boston Marathon logo
BOSTON MARATHON 2023

Lukasz Zalewski

Bib: 2988•M

NY

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 23%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:10
Rank: #1075
Start → 5K
19:10 | 6:10/mi
10K· 6.21 mi
38:42
Rank: #1294 (-219)
5K → 10K
19:32 | 6:17/mi
15K· 9.32 mi
58:26
Rank: #1449 (-155)
10K → 15K
19:44 | 6:21/mi
20K· 12.43 mi
1:18:18
Rank: #1534 (-85)
15K → 20K
19:52 | 6:24/mi
Half· 13.11 mi
1:22:33
Rank: #1526 (+8)
20K → Half
4:15 | 6:14/mi
25K· 15.53 mi
1:38:12
Rank: #1572 (-46)
Half → 25K
15:39 | 6:27/mi
30K· 18.64 mi
1:58:41
Rank: #1614 (-42)
25K → 30K
20:29 | 6:36/mi
20M
2:07:42
Rank: #1631 (-17)
30K → 20M
9:01 | 6:38/mi
21M
2:14:44
Rank: #1634 (-3)
20M → 21M
7:02 | 7:02/mi
35K· 21.75 mi
2:19:30
Rank: #1620 (+14)
21M → 35K
4:46 | 6:22/mi
23M
2:27:51
Rank: #1632 (-12)
35K → 23M
8:21 | 6:40/mi
24M
2:34:15
Rank: #1613 (+19)
23M → 24M
6:24 | 6:24/mi
40K· 24.85 mi
2:39:51
Rank: #1594 (+19)
24M → 40K
5:36 | 6:33/mi
25.2M
2:42:14
Rank: #1589 (+5)
40K → 25.2M
2:23 | 6:55/mi
Finish· 26.22 mi
2:48:42
Rank: #1569 (+20)
25.2M → Finish
6:28 | 6:21/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
Time1:22:33
Pace6:18 /mi
2nd Half
Distance13.11 mi
Time1:26:09
Pace6:34 /mi
📊Positive Split: 4.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:1119:106:1019:10
6:10
-
10K
6.21 mi10:39:4338:426:1419:32
6:17
+0:07
15K
9.32 mi10:59:2758:266:1619:44
6:21
+0:04
20K
12.43 mi11:19:191:18:186:1819:52
6:24
+0:03
Half
13.11 mi11:23:341:22:336:184:15
6:14
-0:10
25K
15.53 mi11:39:131:38:126:1915:39
6:27
+0:13
30K
18.64 mi11:59:421:58:416:2220:29
6:36
+0:09
20M
20.00 mi12:08:432:07:426:239:01
6:38
+0:02
21M
21.00 mi12:15:452:14:446:257:02
7:02
+0:24
35K
21.75 mi12:20:312:19:306:254:46
6:22
-0:40
23M
23.00 mi12:28:522:27:516:268:21
6:40
+0:18
24M
24.00 mi12:35:162:34:156:266:24
6:24
-0:16
40K
24.85 mi12:40:522:39:516:265:36
6:33
+0:09
25.2M
25.20 mi12:43:152:42:146:262:23
6:55
+0:22
Finish
26.22 mi12:49:432:48:426:266:28
6:21
-0:34

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

6:10 /mi

Average Pace

6:26 /mi

Slowest Pace

7:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:39:17

94% of race

Time at Steady Pace

9:25

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:26 /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 mi10:20:1119:106:1019:10
6:10
#1075
10K
6.21 mi10:39:4338:426:1419:32
6:17
#1294
15K
9.32 mi10:59:2758:266:1619:44
6:21
#1449
20K
12.43 mi11:19:191:18:186:1819:52
6:24
#1534
Half
13.11 mi11:23:341:22:336:184:15
6:14
#1526
25K
15.53 mi11:39:131:38:126:1915:39
6:27
#1572
30K
18.64 mi11:59:421:58:416:2220:29
6:36
#1614
20M
20.00 mi12:08:432:07:426:239:01
6:38
#1631
21M
21.00 mi12:15:452:14:446:257:02
7:02
#1634
35K
21.75 mi12:20:312:19:306:254:46
6:22
#1620
23M
23.00 mi12:28:522:27:516:268:21
6:40
#1632
24M
24.00 mi12:35:162:34:156:266:24
6:24
#1613
40K
24.85 mi12:40:522:39:516:265:36
6:33
#1594
25.2M
25.20 mi12:43:152:42:146:262:23
6:55
#1589
Finish
26.22 mi12:49:432:48:426:266:28
6:21
#1569
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1075101710171874(Top 7%)1795(Top 12%)1795(Top 34%)
10K6.21 mi3.10 mi1294-2191229-2121229-2121720(Top 6%)1644(Top 11%)1644(Top 31%)
15K9.32 mi3.11 mi1449-1551384-1551384-1551874(Top 7%)1795(Top 12%)1795(Top 34%)
20K12.43 mi3.11 mi1534-851465-811465-811770(Top 7%)1694(Top 11%)1694(Top 32%)
Half13.11 mi0.68 mi1526+81457+81457+81498(Top 6%)1434(Top 9%)1434(Top 27%)
25K15.53 mi2.42 mi1572-461504-471504-471959(Top 7%)1875(Top 12%)1875(Top 35%)
30K18.64 mi3.11 mi1614-421545-411545-411923(Top 7%)1839(Top 12%)1839(Top 35%)
20M20.00 mi1.36 mi1631-171560-151560-151986(Top 7%)1891(Top 12%)1891(Top 36%)
21M21.00 mi1.00 mi1634-31562-21562-22266(Top 9%)2139(Top 14%)2139(Top 40%)
35K21.75 mi0.75 mi1620+141549+131549+131824(Top 7%)1730(Top 11%)1730(Top 33%)
23M23.00 mi1.25 mi1632-121562-131562-132027(Top 8%)1917(Top 13%)1917(Top 36%)
24M24.00 mi1.00 mi1613+191542+201542+201666(Top 6%)1574(Top 10%)1574(Top 30%)
40K24.85 mi0.85 mi1594+191523+191523+191721(Top 6%)1619(Top 11%)1619(Top 31%)
25.2M25.20 mi0.35 mi1589+51519+41519+41454(Top 5%)1371(Top 9%)1371(Top 26%)
Finish26.22 mi1.02 mi1569+201500+191500+191793(Top 7%)1677(Top 11%)1677(Top 32%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 7%
×21stories
+97ft-345ft

Overall

1874

Males

1795

M18-39

1795

5K→10K

3.1 - 6.2 mi

Top 6%
×5stories
+79ft-138ft

Overall

1720

Males

1644

M18-39

1644

10K→15K

6.2 - 9.3 mi

Top 7%
×3stories
+67ft-78ft

Overall

1874

Males

1795

M18-39

1795

15K→20K

9.3 - 12.4 mi

Top 7%
×5stories
+106ft-86ft

Overall

1770

Males

1694

M18-39

1694

20K→Half

12.4 - 13.1 mi

Top 6%
×2stories
+19ft-37ft

Overall

1498

Males

1434

M18-39

1434

Half→25K

13.1 - 15.5 mi

Top 7%
×4stories
+66ft-88ft

Overall

1959

Males

1875

M18-39

1875

25K→30K

15.5 - 18.6 mi

Top 7%
×9stories
+181ft-148ft

Overall

1923

Males

1839

M18-39

1839

30K→20M

18.6 - 20.0 mi

Top 7%
×5stories
+64ft-50ft

Overall

1986

Males

1891

M18-39

1891

20M→21M

20.0 - 21.0 mi

Top 9%
×8stories
+106ft-24ft

Overall

2266

Males

2139

M18-39

2139

21M→35K

21.0 - 21.8 mi

Top 7%
×7stories
+17ft-86ft

Overall

1824

Males

1730

M18-39

1730

35K→23M

21.8 - 23.0 mi

Top 8%
×5stories
+23ft-63ft

Overall

2027

Males

1917

M18-39

1917

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1666

Males

1574

M18-39

1574

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1721

Males

1619

M18-39

1619

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1454

Males

1371

M18-39

1371

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1793

Males

1677

M18-39

1677

Passing Analysis

Category:
Athletes Passed
305
Passed By
799
Net Change
-494
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1075
5K → 10K9228-219#1075#1294
10K → 15K12167-155#1294#1449
15K → 20K20105-85#1449#1534
20K → Half124+8#1534#1526
Half → 25K2571-46#1526#1572
25K → 30K3779-42#1572#1614
30K → 20M1431-17#1614#1631
20M → 21M2326-3#1631#1634
21M → 35K228+14#1634#1620
35K → 23M2032-12#1620#1632
23M → 24M4021+19#1632#1613
24M → 40K3011+19#1613#1594
40K → 25.2M127+5#1594#1589
25.2M → Finish299+20#1589#1569
TOTALS305799-494
📊

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