Boston Marathon logo
BOSTON MARATHON 2024

Stefan Kalab

Bib: 7632•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 25550
Top 26%
Gender (Male)
#0 / 14578
Top 37%
Masters (Masters Men)
#0 / 9729
Top 26%
Division (M40-44)
#0 / 2009
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:51
Rank: #4930
Start → 5K
20:51 | 6:43/mi
10K· 6.21 mi
41:45
Rank: #4709 (+221)
5K → 10K
20:54 | 6:44/mi
15K· 9.32 mi
1:02:55
Rank: #4731 (-22)
10K → 15K
21:10 | 6:49/mi
20K· 12.43 mi
1:24:45
Rank: #4923 (-192)
15K → 20K
21:50 | 7:02/mi
Half· 13.11 mi
1:29:29
Rank: #4955 (-32)
20K → Half
4:44 | 6:56/mi
25K· 15.53 mi
1:46:56
Rank: #4993 (-38)
Half → 25K
17:27 | 7:12/mi
30K· 18.64 mi
2:12:18
Rank: #5570 (-577)
25K → 30K
25:22 | 8:10/mi
20M
2:24:14
Rank: #5888 (-318)
30K → 20M
11:56 | 8:47/mi
21M
2:33:20
Rank: #5988 (-100)
20M → 21M
9:06 | 9:06/mi
35K· 21.75 mi
2:39:32
Rank: #6035 (-47)
21M → 35K
6:12 | 8:17/mi
23M
2:49:42
Rank: #5956 (+79)
35K → 23M
10:10 | 8:07/mi
24M
2:58:16
Rank: #6055 (-99)
23M → 24M
8:34 | 8:34/mi
40K· 24.85 mi
3:06:25
Rank: #6279 (-224)
24M → 40K
8:09 | 9:32/mi
25.2M
3:10:05
Rank: #6417 (-138)
40K → 25.2M
3:40 | 10:38/mi
Finish· 26.22 mi
3:18:37
Rank: #6546 (-129)
25.2M → Finish
8:32 | 8:22/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
Time1:29:29
Pace6:50 /mi
2nd Half
Distance13.11 mi
Time1:49:08
Pace8:20 /mi
📊Positive Split: 22.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:3120:516:4320:51
6:43
-
10K
6.21 mi10:48:2541:456:4320:54
6:44
+0:01
15K
9.32 mi11:09:351:02:556:4521:10
6:49
+0:05
20K
12.43 mi11:31:251:24:456:4921:50
7:02
+0:13
Half
13.11 mi11:36:091:29:296:504:44
6:56
-0:06
25K
15.53 mi11:53:361:46:566:5317:27
7:12
+0:16
30K
18.64 mi12:18:582:12:187:0625:22
8:10
+0:58
20M
20.00 mi12:30:542:24:147:1311:56
8:47
+0:37
21M
21.00 mi12:40:002:33:207:189:06
9:06
+0:19
35K
21.75 mi12:46:122:39:327:206:12
8:17
-0:49
23M
23.00 mi12:56:222:49:427:2310:10
8:07
-0:10
24M
24.00 mi13:04:562:58:167:268:34
8:34
+0:27
40K
24.85 mi13:13:053:06:257:308:09
9:32
+0:58
25.2M
25.20 mi13:16:453:10:057:333:40
10:38
+1:06
Finish
26.22 mi13:25:173:18:377:358:32
8:22
-2:16

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

6:43 /mi

Average Pace

7:35 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:56

54% of race

Time at Steady Pace

58:50

30% of race

Time at Slower Pace

32:51

17% of race

Average Pace: 7:35 /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 mi10:27:3120:516:4320:51
6:43
#4930
10K
6.21 mi10:48:2541:456:4320:54
6:44
#4709
15K
9.32 mi11:09:351:02:556:4521:10
6:49
#4731
20K
12.43 mi11:31:251:24:456:4921:50
7:02
#4923
Half
13.11 mi11:36:091:29:296:504:44
6:56
#4955
25K
15.53 mi11:53:361:46:566:5317:27
7:12
#4993
30K
18.64 mi12:18:582:12:187:0625:22
8:10
#5570
20M
20.00 mi12:30:542:24:147:1311:56
8:47
#5888
21M
21.00 mi12:40:002:33:207:189:06
9:06
#5988
35K
21.75 mi12:46:122:39:327:206:12
8:17
#6035
23M
23.00 mi12:56:222:49:427:2310:10
8:07
#5956
24M
24.00 mi13:04:562:58:167:268:34
8:34
#6055
40K
24.85 mi13:13:053:06:257:308:09
9:32
#6279
25.2M
25.20 mi13:16:453:10:057:333:40
10:38
#6417
Finish
26.22 mi13:25:173:18:377:358:32
8:22
#6546
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4930457245724855(Top 19%)4487(Top 31%)4487(Top 223%)
10K6.21 mi3.10 mi4709+2214391+1814391+1814561(Top 18%)4253(Top 29%)4253(Top 212%)
15K9.32 mi3.11 mi4731-224401-104401-104855(Top 19%)4487(Top 31%)4487(Top 223%)
20K12.43 mi3.11 mi4923-1924557-1564557-1565404(Top 21%)4889(Top 34%)4889(Top 243%)
Half13.11 mi0.68 mi4955-324585-284585-285395(Top 21%)4879(Top 33%)4879(Top 243%)
25K15.53 mi2.42 mi4993-384589-44589-45296(Top 21%)4702(Top 32%)4702(Top 234%)
30K18.64 mi3.11 mi5570-5774978-3894978-3898791(Top 34%)6651(Top 46%)6651(Top 331%)
20M20.00 mi1.36 mi5888-3185182-2045182-20410965(Top 43%)7482(Top 51%)7482(Top 372%)
21M21.00 mi1.00 mi5988-1005223-415223-419007(Top 35%)6280(Top 43%)6280(Top 313%)
35K21.75 mi0.75 mi6035-475239-165239-169434(Top 37%)6465(Top 44%)6465(Top 322%)
23M23.00 mi1.25 mi5956+795144+955144+956361(Top 25%)4728(Top 32%)4728(Top 235%)
24M24.00 mi1.00 mi6055-995175-315175-319811(Top 38%)6437(Top 44%)6437(Top 320%)
40K24.85 mi0.85 mi6279-2245288-1135288-11313209(Top 52%)8021(Top 55%)8021(Top 399%)
25.2M25.20 mi0.35 mi6417-1385350-625350-6213193(Top 52%)7964(Top 55%)7964(Top 396%)
Finish26.22 mi1.02 mi6546-1295405-555405-5510753(Top 42%)6858(Top 47%)6858(Top 341%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

4855

Males

4487

M40-44

4487

5K→10K

3.1 - 6.2 mi

Top 18%
×5stories
+79ft-138ft

Overall

4561

Males

4253

M40-44

4253

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

4855

Males

4487

M40-44

4487

15K→20K

9.3 - 12.4 mi

Top 21%
×5stories
+106ft-86ft

Overall

5404

Males

4889

M40-44

4889

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5395

Males

4879

M40-44

4879

Half→25K

13.1 - 15.5 mi

Top 21%
×4stories
+66ft-88ft

Overall

5296

Males

4702

M40-44

4702

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

8791

Males

6651

M40-44

6651

30K→20M

18.6 - 20.0 mi

Top 43%
×5stories
+64ft-50ft

Overall

10965

Males

7482

M40-44

7482

20M→21M

20.0 - 21.0 mi

Top 35%
×8stories
+106ft-24ft

Overall

9007

Males

6280

M40-44

6280

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

9434

Males

6465

M40-44

6465

35K→23M

21.8 - 23.0 mi

Top 25%
×5stories
+23ft-63ft

Overall

6361

Males

4728

M40-44

4728

23M→24M

23.0 - 24.0 mi

Top 38%
×6stories
+12ft-82ft

Overall

9811

Males

6437

M40-44

6437

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13209

Males

8021

M40-44

8021

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

13193

Males

7964

M40-44

7964

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2stories
+22ft-21ft

Overall

10753

Males

6858

M40-44

6858

Passing Analysis

Category:
Athletes Passed
1237
Passed By
2853
Net Change
-1616
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4930
5K → 10K30988+221#4930#4709
10K → 15K126148-22#4709#4731
15K → 20K126318-192#4731#4923
20K → Half2052-32#4923#4955
Half → 25K162200-38#4955#4993
25K → 30K64641-577#4993#5570
30K → 20M29347-318#5570#5888
20M → 21M72172-100#5888#5988
21M → 35K60107-47#5988#6035
35K → 23M14667+79#6035#5956
23M → 24M55154-99#5956#6055
24M → 40K29253-224#6055#6279
40K → 25.2M8146-138#6279#6417
25.2M → Finish31160-129#6417#6546
TOTALS12372853-1616
📊

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