Boston Marathon logo
BOSTON MARATHON 2023

Kassem Abdulkarim

Bib: 30700•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
10:33/mi
32:47
↑ 97↓ 3451.5%
10K· 6.21 mi
10:35/mi
1:05:41
↑ 79↓ 1380.4%
15K· 9.32 mi
11:10/mi
1:40:24
↑ 67↓ 78
20K· 12.43 mi
11:45/mi
2:16:55
↑ 106↓ 860.1%
Half· 13.11 mi
11:41/mi
2:24:53
↑ 19↓ 370.5%
25K· 15.53 mi
11:02/mi
2:51:37
↑ 66↓ 880.2%
30K· 18.64 mi
11:58/mi
3:28:48
↑ 181↓ 1480.2%
20M
12:20/mi
3:45:33
↑ 64↓ 500.2%
21M
13:49/mi
3:59:22
↑ 106↓ 241.6%
35K· 21.75 mi
11:48/mi
4:08:12
↑ 17↓ 861.7%
23M
12:44/mi
4:24:09
↑ 23↓ 630.6%
24M
11:34/mi
4:35:43
↓ 821.3%
40K· 24.85 mi
12:27/mi
4:46:22
↓ 200.3%
25.2M
13:17/mi
4:50:57
↑ 13↓ 160.2%
Finish· 26.22 mi
11:07/mi
5:02:17
↑ 22↓ 21

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
Time2:24:53
Pace11:03 /mi
2nd Half
Distance13.11 mi
Time2:37:24
Pace12:00 /mi
📊Positive Split: 8.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:4232:4710:3332:47
10:33
-
10K
6.21 mi12:24:361:05:4110:3432:54
10:35
+0:02
15K
9.32 mi12:59:191:40:2410:4634:43
11:10
+0:35
20K
12.43 mi13:35:502:16:5511:0136:31
11:45
+0:35
Half
13.11 mi13:43:482:24:5311:037:58
11:41
-0:04
25K
15.53 mi14:10:322:51:3711:0326:44
11:02
-0:39
30K
18.64 mi14:47:433:28:4811:1237:11
11:58
+0:56
20M
20.00 mi15:04:283:45:3311:1716:45
12:20
+0:22
21M
21.00 mi15:18:173:59:2211:2413:49
13:49
+1:29
35K
21.75 mi15:27:074:08:1211:258:50
11:48
-2:01
23M
23.00 mi15:43:044:24:0911:2915:57
12:44
+0:56
24M
24.00 mi15:54:384:35:4311:2911:34
11:34
-1:10
40K
24.85 mi16:05:174:46:2211:3110:39
12:27
+0:53
25.2M
25.20 mi16:09:524:50:5711:334:35
13:17
+0:50
Finish
26.22 mi16:21:125:02:1711:3211:20
11:07
-2:10

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

10:33 /mi

Average Pace

11:32 /mi

Slowest Pace

13:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:18:28

46% of race

Time at Steady Pace

1:42:04

34% of race

Time at Slower Pace

1:01:45

20% of race

Average Pace: 11:32 /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 mi11:51:4232:4710:3332:47
10:33
#24829
10K
6.21 mi12:24:361:05:4110:3432:54
10:35
#24849
15K
9.32 mi12:59:191:40:2410:4634:43
11:10
#25097
20K
12.43 mi13:35:502:16:5511:0136:31
11:45
#25249
Half
13.11 mi13:43:482:24:5311:037:58
11:41
#25282
25K
15.53 mi14:10:322:51:3711:0326:44
11:02
#25078
30K
18.64 mi14:47:433:28:4811:1237:11
11:58
#24971
20M
20.00 mi15:04:283:45:3311:1716:45
12:20
#24952
21M
21.00 mi15:18:173:59:2211:2413:49
13:49
#24967
35K
21.75 mi15:27:074:08:1211:258:50
11:48
#24961
23M
23.00 mi15:43:044:24:0911:2915:57
12:44
#24968
24M
24.00 mi15:54:384:35:4311:2911:34
11:34
#24953
40K
24.85 mi16:05:174:46:2211:3110:39
12:27
#24941
25.2M
25.20 mi16:09:524:50:5711:334:35
13:17
#24940
Finish
26.22 mi16:21:125:02:1711:3211:20
11:07
#24921
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi24829144621446225391(Top 95%)14689(Top 97%)14689(Top 716%)
10K6.21 mi3.10 mi24849-2014477-1514477-1524833(Top 93%)14467(Top 95%)14467(Top 705%)
15K9.32 mi3.11 mi25097-24814581-10414581-10425391(Top 95%)14689(Top 97%)14689(Top 716%)
20K12.43 mi3.11 mi25249-15214632-5114632-5125479(Top 96%)14694(Top 97%)14694(Top 716%)
Half13.11 mi0.68 mi25282-3314640-814640-825619(Top 96%)14740(Top 97%)14740(Top 718%)
25K15.53 mi2.42 mi25078+20414548+9214548+9224022(Top 90%)14035(Top 92%)14035(Top 684%)
30K18.64 mi3.11 mi24971+10714482+6614482+6624459(Top 92%)14183(Top 93%)14183(Top 691%)
20M20.00 mi1.36 mi24952+1914462+2014462+2024568(Top 92%)14171(Top 93%)14171(Top 691%)
21M21.00 mi1.00 mi24967-1514454+814454+824877(Top 93%)14311(Top 94%)14311(Top 697%)
35K21.75 mi0.75 mi24961+614449+514449+524485(Top 92%)14077(Top 93%)14077(Top 686%)
23M23.00 mi1.25 mi24968-714447+214447+224838(Top 93%)14264(Top 94%)14264(Top 695%)
24M24.00 mi1.00 mi24953+1514431+1614431+1623962(Top 90%)13796(Top 91%)13796(Top 672%)
40K24.85 mi0.85 mi24941+1214419+1214419+1224394(Top 92%)13986(Top 92%)13986(Top 682%)
25.2M25.20 mi0.35 mi24940+114417+214417+224300(Top 91%)13950(Top 92%)13950(Top 680%)
Finish26.22 mi1.02 mi24921+1914404+1314404+1324177(Top 91%)13920(Top 92%)13920(Top 678%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 95%
×21story building
+97ft-345ft

Overall

25391

Males

14689

M50-54

14689

5K→10K

3.1 - 6.2 mi

Top 93%
×5story building
+79ft-138ft

Overall

24833

Males

14467

M50-54

14467

10K→15K

6.2 - 9.3 mi

Top 95%
×3story building
+67ft-78ft

Overall

25391

Males

14689

M50-54

14689

15K→20K

9.3 - 12.4 mi

Top 96%
×5story building
+106ft-86ft

Overall

25479

Males

14694

M50-54

14694

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

25619

Males

14740

M50-54

14740

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

24022

Males

14035

M50-54

14035

25K→30K

15.5 - 18.6 mi

Top 92%
×9story building
+181ft-148ft

Overall

24459

Males

14183

M50-54

14183

30K→20M

18.6 - 20.0 mi

Top 92%
×5story building
+64ft-50ft

Overall

24568

Males

14171

M50-54

14171

20M→21M

20.0 - 21.0 mi

Top 93%
×8story building
+106ft-24ft

Overall

24877

Males

14311

M50-54

14311

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

24485

Males

14077

M50-54

14077

35K→23M

21.8 - 23.0 mi

Top 93%
×5story building
+23ft-63ft

Overall

24838

Males

14264

M50-54

14264

23M→24M

23.0 - 24.0 mi

Top 90%
×6story building
+12ft-82ft

Overall

23962

Males

13796

M50-54

13796

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

24394

Males

13986

M50-54

13986

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

24300

Males

13950

M50-54

13950

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2story building
+22ft-21ft

Overall

24177

Males

13920

M50-54

13920

Passing Analysis

Category:
Athletes Passed
870
Passed By
962
Net Change
-92
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24829
5K → 10K176196-20#24829#24849
10K → 15K36284-248#24849#25097
15K → 20K54206-152#25097#25249
20K → Half740-33#25249#25282
Half → 25K2095+204#25282#25078
25K → 30K14235+107#25078#24971
30K → 20M4930+19#24971#24952
20M → 21M3045-15#24952#24967
21M → 35K2923+6#24967#24961
35K → 23M2633-7#24961#24968
23M → 24M3217+15#24968#24953
24M → 40K3321+12#24953#24941
40K → 25.2M1413+1#24941#24940
25.2M → Finish3314+19#24940#24921
TOTALS870962-92
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing