Boston Marathon logo
BOSTON MARATHON 2023

Fred Inklaar

Bib: 16429•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 37%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 41%
Division (M55-59)
#0 / 1422
Top 23%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:33
Rank: #10335
Start → 5K
23:33 | 7:35/mi
10K· 6.21 mi
47:14
Rank: #10926 (-591)
5K → 10K
23:41 | 7:37/mi
15K· 9.32 mi
1:11:08
Rank: #11209 (-283)
10K → 15K
23:54 | 7:42/mi
20K· 12.43 mi
1:35:07
Rank: #11136 (+73)
15K → 20K
23:59 | 7:43/mi
Half· 13.11 mi
1:40:16
Rank: #11108 (+28)
20K → Half
5:09 | 7:33/mi
25K· 15.53 mi
1:58:50
Rank: #10897 (+211)
Half → 25K
18:34 | 7:39/mi
30K· 18.64 mi
2:23:26
Rank: #10722 (+175)
25K → 30K
24:36 | 7:55/mi
20M
2:34:15
Rank: #10655 (+67)
30K → 20M
10:49 | 7:58/mi
21M
2:42:40
Rank: #10585 (+70)
20M → 21M
8:25 | 8:25/mi
35K· 21.75 mi
2:48:19
Rank: #10495 (+90)
21M → 35K
5:39 | 7:33/mi
23M
2:57:54
Rank: #10279 (+216)
35K → 23M
9:35 | 7:39/mi
24M
3:05:25
Rank: #10143 (+136)
23M → 24M
7:31 | 7:31/mi
40K· 24.85 mi
3:11:56
Rank: #10016 (+127)
24M → 40K
6:31 | 7:37/mi
25.2M
3:14:45
Rank: #9949 (+67)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:22:29
Rank: #9879 (+70)
25.2M → Finish
7:44 | 7:35/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
Time1:40:16
Pace7:39 /mi
2nd Half
Distance13.11 mi
Time1:42:13
Pace7:48 /mi
📊Positive Split: 1.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:4423:337:3523:33
7:35
-
10K
6.21 mi11:37:2547:147:3623:41
7:37
+0:02
15K
9.32 mi12:01:191:11:087:3823:54
7:42
+0:05
20K
12.43 mi12:25:181:35:077:3923:59
7:43
+0:01
Half
13.11 mi12:30:271:40:167:395:09
7:33
-0:10
25K
15.53 mi12:49:011:58:507:3918:34
7:39
+0:06
30K
18.64 mi13:13:372:23:267:4224:36
7:55
+0:16
20M
20.00 mi13:24:262:34:157:4310:49
7:58
+0:03
21M
21.00 mi13:32:512:42:407:458:25
8:25
+0:27
35K
21.75 mi13:38:302:48:197:445:39
7:33
-0:52
23M
23.00 mi13:48:052:57:547:449:35
7:39
+0:06
24M
24.00 mi13:55:363:05:257:447:31
7:31
-0:08
40K
24.85 mi14:02:073:11:567:436:31
7:37
+0:06
25.2M
25.20 mi14:04:563:14:457:442:49
8:10
+0:33
Finish
26.22 mi14:12:403:22:297:447:44
7:35
-0:35

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

7:31 /mi

Average Pace

7:44 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:04

96% of race

Time at Steady Pace

8:25

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:43 /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 mi11:13:4423:337:3523:33
7:35
#10335
10K
6.21 mi11:37:2547:147:3623:41
7:37
#10926
15K
9.32 mi12:01:191:11:087:3823:54
7:42
#11209
20K
12.43 mi12:25:181:35:077:3923:59
7:43
#11136
Half
13.11 mi12:30:271:40:167:395:09
7:33
#11108
25K
15.53 mi12:49:011:58:507:3918:34
7:39
#10897
30K
18.64 mi13:13:372:23:267:4224:36
7:55
#10722
20M
20.00 mi13:24:262:34:157:4310:49
7:58
#10655
21M
21.00 mi13:32:512:42:407:458:25
8:25
#10585
35K
21.75 mi13:38:302:48:197:445:39
7:33
#10495
23M
23.00 mi13:48:052:57:547:449:35
7:39
#10279
24M
24.00 mi13:55:363:05:257:447:31
7:31
#10143
40K
24.85 mi14:02:073:11:567:436:31
7:37
#10016
25.2M
25.20 mi14:04:563:14:457:442:49
8:10
#9949
Finish
26.22 mi14:12:403:22:297:447:44
7:35
#9879
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi103358312831211776(Top 44%)8981(Top 59%)8981(Top 632%)
10K6.21 mi3.10 mi10926-5918624-3128624-31211516(Top 43%)8886(Top 59%)8886(Top 625%)
15K9.32 mi3.11 mi11209-2838751-1278751-12711776(Top 44%)8981(Top 59%)8981(Top 632%)
20K12.43 mi3.11 mi11136+738719+328719+3211058(Top 42%)8605(Top 57%)8605(Top 605%)
Half13.11 mi0.68 mi11108+288702+178702+1710544(Top 40%)8366(Top 55%)8366(Top 588%)
25K15.53 mi2.42 mi10897+2118581+1218581+1219950(Top 37%)7953(Top 52%)7953(Top 559%)
30K18.64 mi3.11 mi10722+1758444+1378444+13710256(Top 39%)7959(Top 52%)7959(Top 560%)
20M20.00 mi1.36 mi10655+678381+638381+639946(Top 37%)7728(Top 51%)7728(Top 543%)
21M21.00 mi1.00 mi10585+708328+538328+539944(Top 37%)7573(Top 50%)7573(Top 533%)
35K21.75 mi0.75 mi10495+908265+638265+638903(Top 33%)7027(Top 46%)7027(Top 494%)
23M23.00 mi1.25 mi10279+2168132+1338132+1337459(Top 28%)6100(Top 40%)6100(Top 429%)
24M24.00 mi1.00 mi10143+1368033+998033+997815(Top 29%)6210(Top 41%)6210(Top 437%)
40K24.85 mi0.85 mi10016+1277933+1007933+1007455(Top 28%)5915(Top 39%)5915(Top 416%)
25.2M25.20 mi0.35 mi9949+677882+517882+517500(Top 28%)5900(Top 39%)5900(Top 415%)
Finish26.22 mi1.02 mi9879+707827+557827+559187(Top 35%)6857(Top 45%)6857(Top 482%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21stories
+97ft-345ft

Overall

11776

Males

8981

M55-59

8981

5K→10K

3.1 - 6.2 mi

Top 43%
×5stories
+79ft-138ft

Overall

11516

Males

8886

M55-59

8886

10K→15K

6.2 - 9.3 mi

Top 44%
×3stories
+67ft-78ft

Overall

11776

Males

8981

M55-59

8981

15K→20K

9.3 - 12.4 mi

Top 42%
×5stories
+106ft-86ft

Overall

11058

Males

8605

M55-59

8605

20K→Half

12.4 - 13.1 mi

Top 40%
×2stories
+19ft-37ft

Overall

10544

Males

8366

M55-59

8366

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

9950

Males

7953

M55-59

7953

25K→30K

15.5 - 18.6 mi

Top 39%
×9stories
+181ft-148ft

Overall

10256

Males

7959

M55-59

7959

30K→20M

18.6 - 20.0 mi

Top 37%
×5stories
+64ft-50ft

Overall

9946

Males

7728

M55-59

7728

20M→21M

20.0 - 21.0 mi

Top 37%
×8stories
+106ft-24ft

Overall

9944

Males

7573

M55-59

7573

21M→35K

21.0 - 21.8 mi

Top 33%
×7stories
+17ft-86ft

Overall

8903

Males

7027

M55-59

7027

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

7459

Males

6100

M55-59

6100

23M→24M

23.0 - 24.0 mi

Top 29%
×6stories
+12ft-82ft

Overall

7815

Males

6210

M55-59

6210

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

7455

Males

5915

M55-59

5915

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7500

Males

5900

M55-59

5900

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

9187

Males

6857

M55-59

6857

Passing Analysis

Category:
Athletes Passed
1948*
Passed By
1492
Net Change
+456
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10335
5K → 10K98689-591#10335#10926
10K → 15K95378-283#10926#11209
15K → 20K193120+73#11209#11136
20K → Half3810+28#11136#11108
Half → 25K24029+211#11108#10897
25K → 30K27499+175#10897#10722
30K → 20M111*44+67#10722#10655
20M → 21M10737+70#10655#10585
21M → 35K10111+90#10585#10495
35K → 23M2248+216#10495#10279
23M → 24M14812+136#10279#10143
24M → 40K1369+127#10143#10016
40K → 25.2M72*5+67#10016#9949
25.2M → Finish111*41+70#9949#9879
TOTALS1948*1492+456

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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