Boston Marathon logo
BOSTON MARATHON 2023

Ken Kilar

Bib: 13935•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 30%
Gender (Male)
#0 / 15176
Top 44%
Masters (Masters Men)
#0 / 9891
Top 31%
Division (M50-54)
#0 / 2052
Top 27%
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
7:29/mi
23:15
↑ 97↓ 3451.5%
10K· 6.21 mi
7:20/mi
46:02
↑ 79↓ 1380.4%
15K· 9.32 mi
7:16/mi
1:08:38
↑ 67↓ 78
20K· 12.43 mi
7:22/mi
1:31:31
↑ 106↓ 860.1%
Half· 13.11 mi
7:18/mi
1:36:30
↑ 19↓ 370.5%
25K· 15.53 mi
7:36/mi
1:54:56
↑ 66↓ 880.2%
30K· 18.64 mi
7:33/mi
2:18:22
↑ 181↓ 1480.2%
20M
7:36/mi
2:28:42
↑ 64↓ 500.2%
21M
8:07/mi
2:36:49
↑ 106↓ 241.6%
35K· 21.75 mi
7:18/mi
2:42:17
↑ 17↓ 861.7%
23M
7:34/mi
2:51:46
↑ 23↓ 630.6%
24M
7:20/mi
2:59:06
↓ 821.3%
40K· 24.85 mi
7:28/mi
3:05:29
↓ 200.3%
25.2M
7:58/mi
3:08:14
↑ 13↓ 160.2%
Finish· 26.22 mi
7:16/mi
3:15:38
↑ 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
Time1:36:30
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:39:08
Pace7:34 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:3423:157:2923:15
7:29
-
10K
6.21 mi11:14:2146:027:2522:47
7:20
-0:09
15K
9.32 mi11:36:571:08:387:2222:36
7:16
-0:04
20K
12.43 mi11:59:501:31:317:2222:53
7:22
+0:06
Half
13.11 mi12:04:491:36:307:224:59
7:18
-0:04
25K
15.53 mi12:23:151:54:567:2418:26
7:36
+0:18
30K
18.64 mi12:46:412:18:227:2523:26
7:33
-0:03
20M
20.00 mi12:57:012:28:427:2610:20
7:36
+0:03
21M
21.00 mi13:05:082:36:497:288:07
8:07
+0:31
35K
21.75 mi13:10:362:42:177:285:28
7:18
-0:49
23M
23.00 mi13:20:052:51:467:289:29
7:34
+0:16
24M
24.00 mi13:27:252:59:067:287:20
7:20
-0:14
40K
24.85 mi13:33:483:05:297:286:23
7:28
+0:08
25.2M
25.20 mi13:36:333:08:147:282:45
7:58
+0:30
Finish
26.22 mi13:43:573:15:387:287:24
7:16
-0:42

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

7:16 /mi

Average Pace

7:28 /mi

Slowest Pace

8:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:07:31

96% of race

Time at Steady Pace

8:07

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:28 /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 mi10:51:3423:157:2923:15
7:29
#9473
10K
6.21 mi11:14:2146:027:2522:47
7:20
#9232
15K
9.32 mi11:36:571:08:387:2222:36
7:16
#8932
20K
12.43 mi11:59:501:31:317:2222:53
7:22
#8726
Half
13.11 mi12:04:491:36:307:224:59
7:18
#8708
25K
15.53 mi12:23:151:54:567:2418:26
7:36
#8827
30K
18.64 mi12:46:412:18:227:2523:26
7:33
#8534
20M
20.00 mi12:57:012:28:427:2610:20
7:36
#8438
21M
21.00 mi13:05:082:36:497:288:07
8:07
#8404
35K
21.75 mi13:10:362:42:177:285:28
7:18
#8347
23M
23.00 mi13:20:052:51:467:289:29
7:34
#8203
24M
24.00 mi13:27:252:59:067:287:20
7:20
#8103
40K
24.85 mi13:33:483:05:297:286:23
7:28
#8001
25.2M
25.20 mi13:36:333:08:147:282:45
7:58
#7971
Finish
26.22 mi13:43:573:15:387:287:24
7:16
#7907
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi9473785278528337(Top 31%)7130(Top 47%)7130(Top 347%)
10K6.21 mi3.10 mi9232+2417709+1437709+1439088(Top 34%)7628(Top 50%)7628(Top 372%)
15K9.32 mi3.11 mi8932+3007517+1927517+1928337(Top 31%)7130(Top 47%)7130(Top 347%)
20K12.43 mi3.11 mi8726+2067389+1287389+1288253(Top 31%)7045(Top 46%)7045(Top 343%)
Half13.11 mi0.68 mi8708+187374+157374+158577(Top 32%)7241(Top 48%)7241(Top 353%)
25K15.53 mi2.42 mi8827-1197431-577431-579537(Top 36%)7723(Top 51%)7723(Top 376%)
30K18.64 mi3.11 mi8534+2937213+2187213+2187517(Top 28%)6398(Top 42%)6398(Top 312%)
20M20.00 mi1.36 mi8438+967133+807133+807510(Top 28%)6286(Top 41%)6286(Top 306%)
21M21.00 mi1.00 mi8404+347090+437090+438089(Top 30%)6525(Top 43%)6525(Top 318%)
35K21.75 mi0.75 mi8347+577046+447046+447160(Top 27%)6000(Top 40%)6000(Top 292%)
23M23.00 mi1.25 mi8203+1446934+1126934+1126901(Top 26%)5766(Top 38%)5766(Top 281%)
24M24.00 mi1.00 mi8103+1006853+816853+816599(Top 25%)5489(Top 36%)5489(Top 267%)
40K24.85 mi0.85 mi8001+1026767+866767+866492(Top 24%)5338(Top 35%)5338(Top 260%)
25.2M25.20 mi0.35 mi7971+306737+306737+306342(Top 24%)5178(Top 34%)5178(Top 252%)
Finish26.22 mi1.02 mi7907+646677+606677+606831(Top 26%)5466(Top 36%)5466(Top 266%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21story building
+97ft-345ft

Overall

8337

Males

7130

M50-54

7130

5K→10K

3.1 - 6.2 mi

Top 34%
×5story building
+79ft-138ft

Overall

9088

Males

7628

M50-54

7628

10K→15K

6.2 - 9.3 mi

Top 31%
×3story building
+67ft-78ft

Overall

8337

Males

7130

M50-54

7130

15K→20K

9.3 - 12.4 mi

Top 31%
×5story building
+106ft-86ft

Overall

8253

Males

7045

M50-54

7045

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

8577

Males

7241

M50-54

7241

Half→25K

13.1 - 15.5 mi

Top 36%
×4story building
+66ft-88ft

Overall

9537

Males

7723

M50-54

7723

25K→30K

15.5 - 18.6 mi

Top 28%
×9story building
+181ft-148ft

Overall

7517

Males

6398

M50-54

6398

30K→20M

18.6 - 20.0 mi

Top 28%
×5story building
+64ft-50ft

Overall

7510

Males

6286

M50-54

6286

20M→21M

20.0 - 21.0 mi

Top 30%
×8story building
+106ft-24ft

Overall

8089

Males

6525

M50-54

6525

21M→35K

21.0 - 21.8 mi

Top 27%
×7story building
+17ft-86ft

Overall

7160

Males

6000

M50-54

6000

35K→23M

21.8 - 23.0 mi

Top 26%
×5story building
+23ft-63ft

Overall

6901

Males

5766

M50-54

5766

23M→24M

23.0 - 24.0 mi

Top 25%
×6story building
+12ft-82ft

Overall

6599

Males

5489

M50-54

5489

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6492

Males

5338

M50-54

5338

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6342

Males

5178

M50-54

5178

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2story building
+22ft-21ft

Overall

6831

Males

5466

M50-54

5466

Passing Analysis

Category:
Athletes Passed
2237
Passed By
671
Net Change
+1566
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9473
5K → 10K412171+241#9473#9232
10K → 15K34040+300#9232#8932
15K → 20K24034+206#8932#8726
20K → Half3214+18#8726#8708
Half → 25K60179-119#8708#8827
25K → 30K32734+293#8827#8534
30K → 20M13337+96#8534#8438
20M → 21M8652+34#8438#8404
21M → 35K7316+57#8404#8347
35K → 23M16824+144#8347#8203
23M → 24M11414+100#8203#8103
24M → 40K11614+102#8103#8001
40K → 25.2M4111+30#8001#7971
25.2M → Finish9531+64#7971#7907
TOTALS2237671+1566
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing