Boston Marathon logo
BOSTON MARATHON 2023

Cem Aslan

Bib: 1487•M

PA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 4%
Gender (Male)
#0 / 15176
Top 7%
Masters (Masters Men)
#0 / 9891
Top 2%
Division (M45-49)
#0 / 2252
Top 2%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:50
Rank: #1746
Start → 5K
19:50 | 6:23/mi
10K· 6.21 mi
39:08
Rank: #1556 (+190)
5K → 10K
19:18 | 6:13/mi
15K· 9.32 mi
58:27
Rank: #1450 (+106)
10K → 15K
19:19 | 6:13/mi
20K· 12.43 mi
1:18:05
Rank: #1437 (+13)
15K → 20K
19:38 | 6:19/mi
Half· 13.11 mi
1:22:19
Rank: #1433 (+4)
20K → Half
4:14 | 6:12/mi
25K· 15.53 mi
1:37:30
Rank: #1377 (+56)
Half → 25K
15:11 | 6:16/mi
30K· 18.64 mi
1:57:03
Rank: #1258 (+119)
25K → 30K
19:33 | 6:18/mi
20M
2:05:39
Rank: #1221 (+37)
30K → 20M
8:36 | 6:20/mi
21M
2:12:17
Rank: #1187 (+34)
20M → 21M
6:38 | 6:38/mi
35K· 21.75 mi
2:16:53
Rank: #1168 (+19)
21M → 35K
4:36 | 6:09/mi
23M
2:24:42
Rank: #1116 (+52)
35K → 23M
7:49 | 6:15/mi
24M
2:30:51
Rank: #1105 (+11)
23M → 24M
6:09 | 6:09/mi
40K· 24.85 mi
2:36:17
Rank: #1086 (+19)
24M → 40K
5:26 | 6:21/mi
25.2M
2:38:38
Rank: #1084 (+2)
40K → 25.2M
2:21 | 6:49/mi
Finish· 26.22 mi
2:44:48
Rank: #1062 (+22)
25.2M → Finish
6:10 | 6:03/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⚖️ Balanced
Distance13.11 mi
Time1:22:19
Pace6:17 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:22:29
Pace6:18 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:4119:506:2319:50
6:23
-
10K
6.21 mi10:39:5939:086:1819:18
6:13
-0:10
15K
9.32 mi10:59:1858:276:1619:19
6:13
0:00
20K
12.43 mi11:18:561:18:056:1719:38
6:19
+0:06
Half
13.11 mi11:23:101:22:196:174:14
6:12
-0:07
25K
15.53 mi11:38:211:37:306:1715:11
6:16
+0:04
30K
18.64 mi11:57:541:57:036:1719:33
6:18
+0:02
20M
20.00 mi12:06:302:05:396:178:36
6:20
+0:02
21M
21.00 mi12:13:082:12:176:186:38
6:38
+0:18
35K
21.75 mi12:17:442:16:536:184:36
6:09
-0:29
23M
23.00 mi12:25:332:24:426:177:49
6:15
+0:06
24M
24.00 mi12:31:422:30:516:176:09
6:09
-0:06
40K
24.85 mi12:37:082:36:176:175:26
6:21
+0:12
25.2M
25.20 mi12:39:292:38:386:182:21
6:49
+0:28
Finish
26.22 mi12:45:392:44:486:176:10
6:03
-0:46

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

6:03 /mi

Average Pace

6:17 /mi

Slowest Pace

6:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:27

99% of race

Time at Steady Pace

2:21

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:17 /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 mi10:20:4119:506:2319:50
6:23
#1746
10K
6.21 mi10:39:5939:086:1819:18
6:13
#1556
15K
9.32 mi10:59:1858:276:1619:19
6:13
#1450
20K
12.43 mi11:18:561:18:056:1719:38
6:19
#1437
Half
13.11 mi11:23:101:22:196:174:14
6:12
#1433
25K
15.53 mi11:38:211:37:306:1715:11
6:16
#1377
30K
18.64 mi11:57:541:57:036:1719:33
6:18
#1258
20M
20.00 mi12:06:302:05:396:178:36
6:20
#1221
21M
21.00 mi12:13:082:12:176:186:38
6:38
#1187
35K
21.75 mi12:17:442:16:536:184:36
6:09
#1168
23M
23.00 mi12:25:332:24:426:177:49
6:15
#1116
24M
24.00 mi12:31:422:30:516:176:09
6:09
#1105
40K
24.85 mi12:37:082:36:176:175:26
6:21
#1086
25.2M
25.20 mi12:39:292:38:386:182:21
6:49
#1084
Finish
26.22 mi12:45:392:44:486:176:10
6:03
#1062
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi1746166416641302(Top 5%)1240(Top 8%)1240(Top 55%)
10K6.21 mi3.10 mi1556+1901484+1801484+1801395(Top 5%)1330(Top 9%)1330(Top 59%)
15K9.32 mi3.11 mi1450+1061385+991385+991302(Top 5%)1240(Top 8%)1240(Top 55%)
20K12.43 mi3.11 mi1437+131370+151370+151458(Top 5%)1392(Top 9%)1392(Top 62%)
Half13.11 mi0.68 mi1433+41366+41366+41356(Top 5%)1296(Top 9%)1296(Top 58%)
25K15.53 mi2.42 mi1377+561314+521314+521182(Top 4%)1128(Top 7%)1128(Top 50%)
30K18.64 mi3.11 mi1258+1191203+1111203+111899(Top 3%)856(Top 6%)856(Top 38%)
20M20.00 mi1.36 mi1221+371166+371166+37942(Top 4%)899(Top 6%)899(Top 40%)
21M21.00 mi1.00 mi1187+341133+331133+33933(Top 4%)885(Top 6%)885(Top 39%)
35K21.75 mi0.75 mi1168+191114+191114+191071(Top 4%)1019(Top 7%)1019(Top 45%)
23M23.00 mi1.25 mi1116+521064+501064+50707(Top 3%)667(Top 4%)667(Top 30%)
24M24.00 mi1.00 mi1105+111053+111053+11876(Top 3%)831(Top 5%)831(Top 37%)
40K24.85 mi0.85 mi1086+191034+191034+191051(Top 4%)994(Top 7%)994(Top 44%)
25.2M25.20 mi0.35 mi1084+21032+21032+21179(Top 4%)1118(Top 7%)1118(Top 50%)
Finish26.22 mi1.02 mi1062+221011+211011+21855(Top 3%)819(Top 5%)819(Top 36%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1302

Males

1240

M45-49

1240

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1395

Males

1330

M45-49

1330

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1302

Males

1240

M45-49

1240

15K→20K

9.3 - 12.4 mi

Top 5%
×5stories
+106ft-86ft

Overall

1458

Males

1392

M45-49

1392

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1356

Males

1296

M45-49

1296

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1182

Males

1128

M45-49

1128

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

899

Males

856

M45-49

856

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

942

Males

899

M45-49

899

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

933

Males

885

M45-49

885

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1071

Males

1019

M45-49

1019

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

707

Males

667

M45-49

667

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

876

Males

831

M45-49

831

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1051

Males

994

M45-49

994

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1179

Males

1118

M45-49

1118

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2stories
+22ft-21ft

Overall

855

Males

819

M45-49

819

Passing Analysis

Category:
Athletes Passed
817
Passed By
133
Net Change
+684
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1746
5K → 10K21323+190#1746#1556
10K → 15K12014+106#1556#1450
15K → 20K5138+13#1450#1437
20K → Half95+4#1437#1433
Half → 25K648+56#1433#1377
25K → 30K1190+119#1377#1258
30K → 20M392+37#1258#1221
20M → 21M4511+34#1221#1187
21M → 35K212+19#1187#1168
35K → 23M553+52#1168#1116
23M → 24M198+11#1116#1105
24M → 40K245+19#1105#1086
40K → 25.2M75+2#1086#1084
25.2M → Finish319+22#1084#1062
TOTALS817133+684
📊

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