Boston Marathon logo
BOSTON MARATHON 2023

Clancy Kirk

Bib: 8099•M

LA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 18%
Gender (Male)
#0 / 15176
Top 29%
Masters (Masters Men)
#0 / 9891
Top 15%
Division (M40-44)
#0 / 2241
Top 36%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:01
Rank: #1997
Start → 5K
20:01 | 6:27/mi
10K· 6.21 mi
40:28
Rank: #2600 (-603)
5K → 10K
20:27 | 6:35/mi
15K· 9.32 mi
1:01:24
Rank: #3107 (-507)
10K → 15K
20:56 | 6:44/mi
20K· 12.43 mi
1:22:37
Rank: #3437 (-330)
15K → 20K
21:13 | 6:50/mi
Half· 13.11 mi
1:27:16
Rank: #3515 (-78)
20K → Half
4:39 | 6:49/mi
25K· 15.53 mi
1:44:18
Rank: #3899 (-384)
Half → 25K
17:02 | 7:02/mi
30K· 18.64 mi
2:06:55
Rank: #4384 (-485)
25K → 30K
22:37 | 7:17/mi
20M
2:17:05
Rank: #4625 (-241)
30K → 20M
10:10 | 7:29/mi
21M
2:24:55
Rank: #4736 (-111)
20M → 21M
7:50 | 7:50/mi
35K· 21.75 mi
2:30:16
Rank: #4781 (-45)
21M → 35K
5:21 | 7:09/mi
23M
2:39:24
Rank: #4788 (-7)
35K → 23M
9:08 | 7:18/mi
24M
2:46:38
Rank: #4823 (-35)
23M → 24M
7:14 | 7:14/mi
40K· 24.85 mi
2:52:53
Rank: #4809 (+14)
24M → 40K
6:15 | 7:19/mi
25.2M
2:55:39
Rank: #4831 (-22)
40K → 25.2M
2:46 | 8:01/mi
Finish· 26.22 mi
3:02:55
Rank: #4818 (+13)
25.2M → Finish
7:16 | 7:08/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
Time1:27:16
Pace6:39 /mi
2nd Half
Distance13.11 mi
Time1:35:39
Pace7:18 /mi
📊Positive Split: 9.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:0420:016:2720:01
6:27
-
10K
6.21 mi11:05:3140:286:3120:27
6:35
+0:08
15K
9.32 mi11:26:271:01:246:3520:56
6:44
+0:09
20K
12.43 mi11:47:401:22:376:3921:13
6:50
+0:06
Half
13.11 mi11:52:191:27:166:394:39
6:49
-0:01
25K
15.53 mi12:09:211:44:186:4317:02
7:02
+0:13
30K
18.64 mi12:31:582:06:556:4922:37
7:17
+0:15
20M
20.00 mi12:42:082:17:056:5110:10
7:29
+0:12
21M
21.00 mi12:49:582:24:556:547:50
7:50
+0:21
35K
21.75 mi12:55:192:30:166:555:21
7:09
-0:41
23M
23.00 mi13:04:272:39:246:569:08
7:18
+0:09
24M
24.00 mi13:11:412:46:386:577:14
7:14
-0:04
40K
24.85 mi13:17:562:52:536:576:15
7:19
+0:05
25.2M
25.20 mi13:20:422:55:396:582:46
8:01
+0:42
Finish
26.22 mi13:27:583:02:556:597:16
7:08
-0:53

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

6:27 /mi

Average Pace

6:59 /mi

Slowest Pace

8:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:27:16

48% of race

Time at Steady Pace

1:14:53

41% of race

Time at Slower Pace

20:46

11% of race

Average Pace: 6:59 /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 mi10:45:0420:016:2720:01
6:27
#1997
10K
6.21 mi11:05:3140:286:3120:27
6:35
#2600
15K
9.32 mi11:26:271:01:246:3520:56
6:44
#3107
20K
12.43 mi11:47:401:22:376:3921:13
6:50
#3437
Half
13.11 mi11:52:191:27:166:394:39
6:49
#3515
25K
15.53 mi12:09:211:44:186:4317:02
7:02
#3899
30K
18.64 mi12:31:582:06:556:4922:37
7:17
#4384
20M
20.00 mi12:42:082:17:056:5110:10
7:29
#4625
21M
21.00 mi12:49:582:24:556:547:50
7:50
#4736
35K
21.75 mi12:55:192:30:166:555:21
7:09
#4781
23M
23.00 mi13:04:272:39:246:569:08
7:18
#4788
24M
24.00 mi13:11:412:46:386:577:14
7:14
#4823
40K
24.85 mi13:17:562:52:536:576:15
7:19
#4809
25.2M
25.20 mi13:20:422:55:396:582:46
8:01
#4831
Finish
26.22 mi13:27:583:02:556:597:16
7:08
#4818
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1997190619064493(Top 17%)4197(Top 28%)4197(Top 187%)
10K6.21 mi3.10 mi2600-6032480-5742480-5743370(Top 13%)3207(Top 21%)3207(Top 143%)
15K9.32 mi3.11 mi3107-5072960-4802960-4804493(Top 17%)4197(Top 28%)4197(Top 187%)
20K12.43 mi3.11 mi3437-3303258-2983258-2984714(Top 18%)4386(Top 29%)4386(Top 196%)
Half13.11 mi0.68 mi3515-783330-723330-725351(Top 20%)4934(Top 33%)4934(Top 220%)
25K15.53 mi2.42 mi3899-3843673-3433673-3435702(Top 21%)5220(Top 34%)5220(Top 233%)
30K18.64 mi3.11 mi4384-4854099-4264099-4265907(Top 22%)5307(Top 35%)5307(Top 237%)
20M20.00 mi1.36 mi4625-2414312-2134312-2136632(Top 25%)5720(Top 38%)5720(Top 255%)
21M21.00 mi1.00 mi4736-1114410-984410-986313(Top 24%)5417(Top 36%)5417(Top 242%)
35K21.75 mi0.75 mi4781-454443-334443-336169(Top 23%)5341(Top 35%)5341(Top 238%)
23M23.00 mi1.25 mi4788-74447-44447-45270(Top 20%)4657(Top 31%)4657(Top 208%)
24M24.00 mi1.00 mi4823-354467-204467-205910(Top 22%)5040(Top 33%)5040(Top 225%)
40K24.85 mi0.85 mi4809+144448+194448+195485(Top 21%)4672(Top 31%)4672(Top 208%)
25.2M25.20 mi0.35 mi4831-224456-84456-86530(Top 25%)5256(Top 35%)5256(Top 235%)
Finish26.22 mi1.02 mi4818+134444+124444+125961(Top 22%)4900(Top 32%)4900(Top 219%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21stories
+97ft-345ft

Overall

4493

Males

4197

M40-44

4197

5K→10K

3.1 - 6.2 mi

Top 13%
×5stories
+79ft-138ft

Overall

3370

Males

3207

M40-44

3207

10K→15K

6.2 - 9.3 mi

Top 17%
×3stories
+67ft-78ft

Overall

4493

Males

4197

M40-44

4197

15K→20K

9.3 - 12.4 mi

Top 18%
×5stories
+106ft-86ft

Overall

4714

Males

4386

M40-44

4386

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5351

Males

4934

M40-44

4934

Half→25K

13.1 - 15.5 mi

Top 21%
×4stories
+66ft-88ft

Overall

5702

Males

5220

M40-44

5220

25K→30K

15.5 - 18.6 mi

Top 22%
×9stories
+181ft-148ft

Overall

5907

Males

5307

M40-44

5307

30K→20M

18.6 - 20.0 mi

Top 25%
×5stories
+64ft-50ft

Overall

6632

Males

5720

M40-44

5720

20M→21M

20.0 - 21.0 mi

Top 24%
×8stories
+106ft-24ft

Overall

6313

Males

5417

M40-44

5417

21M→35K

21.0 - 21.8 mi

Top 23%
×7stories
+17ft-86ft

Overall

6169

Males

5341

M40-44

5341

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5270

Males

4657

M40-44

4657

23M→24M

23.0 - 24.0 mi

Top 22%
×6stories
+12ft-82ft

Overall

5910

Males

5040

M40-44

5040

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5485

Males

4672

M40-44

4672

40K→25.2M

24.9 - 25.2 mi

Top 25%
×1story
+13ft-16ft

Overall

6530

Males

5256

M40-44

5256

25.2M→Finish

25.2 - 26.2 mi

Top 22%
×2stories
+22ft-21ft

Overall

5961

Males

4900

M40-44

4900

Passing Analysis

Category:
Athletes Passed
384
Passed By
3205
Net Change
-2821
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1997
5K → 10K8611-603#1997#2600
10K → 15K7514-507#2600#3107
15K → 20K22352-330#3107#3437
20K → Half482-78#3437#3515
Half → 25K20404-384#3515#3899
25K → 30K28513-485#3899#4384
30K → 20M22263-241#4384#4625
20M → 21M26137-111#4625#4736
21M → 35K2873-45#4736#4781
35K → 23M6875-7#4781#4788
23M → 24M3570-35#4788#4823
24M → 40K4834+14#4823#4809
40K → 25.2M1537-22#4809#4831
25.2M → Finish5340+13#4831#4818
TOTALS3843205-2821
📊

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